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Tshibangu

@tshibsamuel477

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5.0
86

6.5

6.5

83%

PCB Designer & layout | Embedded Programming

$30 USD / Hour

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Flag of TUNISIA

Tunisia (7:06 PM)

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Joined on February 3, 2023

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3 Recommendations

$30 USD / Hour

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My name is Samuel, and I am a mechatronic engineer with a specialization in mechatronics, based in Tunisia, with over six years of experience. During this time, I have successfully delivered a wide range of projects, continually expanding my expertise and refining my skills. I am now offering my professional services in designing and prototyping electronic boards using Altium Designer. My PCB design expertise encompasses: Single and Multi-sheet Schematics Single/double-sided and Multi-layer PCB layouts Data and control interfaces: UART, USB, SPI, I2C, SDIO, PCIe, and more Power supply design, including SMPS & LDOs Digital video, audio, and multimedia interfaces: HDMI, MIPI DSI/CSI, I2S, TDM Reverse engineering for existing designs With a commitment to quality and precision, I am ready to bring your electronic board designs to life.

Verifications

On time

98%

On budget

99%

Accept rate

99%

Repeat hire rate

9%

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Portfolio

Portfolio

13913610
Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

13806699
Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

12375591
This project involved the design and development of a complex 6-layer PCB for the LuckFox Pro Ultra W, a high-performance networking device. The primary goal was to ensure optimal signal integrity and power delivery for 100Gb Ethernet connectivity.

PCB Design for LuckFox Pro Ultra W

This project involved the design and development of a complex 6-layer PCB for the LuckFox Pro Ultra W, a high-performance networking device. The primary goal was to ensure optimal signal integrity and power delivery for 100Gb Ethernet connectivity.

PCB Design for LuckFox Pro Ultra W

This project involved the design and development of a complex 6-layer PCB for the LuckFox Pro Ultra W, a high-performance networking device. The primary goal was to ensure optimal signal integrity and power delivery for 100Gb Ethernet connectivity.

PCB Design for LuckFox Pro Ultra W

This project involved the design and development of a complex 6-layer PCB for the LuckFox Pro Ultra W, a high-performance networking device. The primary goal was to ensure optimal signal integrity and power delivery for 100Gb Ethernet connectivity.

PCB Design for LuckFox Pro Ultra W

13891547
Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

13869794
Designed a compact custom control board for a client on Freelancer: a `31 x 121 mm` PCB (max `7 mm` height) that drives two solenoids using `DRV8432` drivers and a `SAM D21` MCU. The project included reverse-polarity protection for a `52 V` input stage, schematic and PCB development, 3D/layout optimization for tight mechanical constraints, and full documentation of design decisions and component sizing.

Solenoid Board R&D

Designed a compact custom control board for a client on Freelancer: a `31 x 121 mm` PCB (max `7 mm` height) that drives two solenoids using `DRV8432` drivers and a `SAM D21` MCU. The project included reverse-polarity protection for a `52 V` input stage, schematic and PCB development, 3D/layout optimization for tight mechanical constraints, and full documentation of design decisions and component sizing.

Solenoid Board R&D

Designed a compact custom control board for a client on Freelancer: a `31 x 121 mm` PCB (max `7 mm` height) that drives two solenoids using `DRV8432` drivers and a `SAM D21` MCU. The project included reverse-polarity protection for a `52 V` input stage, schematic and PCB development, 3D/layout optimization for tight mechanical constraints, and full documentation of design decisions and component sizing.

Solenoid Board R&D

13756091
Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

13913610
Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

Developed custom firmware and desktop tooling for a YC3121-based 384-dot ESC/POS thermal printer. The project includes USB and BLE printing support, runtime printer tuning, thermal head and motor control, self-test printing, barcode/QR/image rendering, custom font upload, buzzer/LED feedback, power management, and a Python desktop configuration UI for diagnostics and settings export. Tech used: C, FreeRTOS, ESC/POS, BLE, USB printer class, Python, PyWebView, embedded firmware, thermal printer drivers.

YC3121Thermal Printer Firmware

13806699
Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

Designed a custom Ethernet switch board for product development and firmware bring-up, built around the Microchip LAN96459F (128-TQFP) and controlled by an STM32H743BIT6 host MCU. The goal was to create a reliable development platform that combines fiber and copper networking while exposing full managed-switch control for future embedded applications. Main features Switch IC: Microchip LAN96459F (managed L2 switch) Host controller: STM32H743BIT6 Ports: 2x SFP fiber + 2x RJ45 10/100BASE-TX Host link: RMII data interface + SPI register/config management Clocking: external 125 MHz reference for SerDes Power architecture: dedicated 1.15 V core/analog and 3.3 V I/O/PHY rails Development focus: hardware validation, switch firmware integration, port configuration, diagnostics, and future product prototyping

LAN96459F Managed Ethernet Switch

12375591
This project involved the design and development of a complex 6-layer PCB for the LuckFox Pro Ultra W, a high-performance networking device. The primary goal was to ensure optimal signal integrity and power delivery for 100Gb Ethernet connectivity.

PCB Design for LuckFox Pro Ultra W

This project involved the design and development of a complex 6-layer PCB for the LuckFox Pro Ultra W, a high-performance networking device. The primary goal was to ensure optimal signal integrity and power delivery for 100Gb Ethernet connectivity.

PCB Design for LuckFox Pro Ultra W

This project involved the design and development of a complex 6-layer PCB for the LuckFox Pro Ultra W, a high-performance networking device. The primary goal was to ensure optimal signal integrity and power delivery for 100Gb Ethernet connectivity.

PCB Design for LuckFox Pro Ultra W

This project involved the design and development of a complex 6-layer PCB for the LuckFox Pro Ultra W, a high-performance networking device. The primary goal was to ensure optimal signal integrity and power delivery for 100Gb Ethernet connectivity.

PCB Design for LuckFox Pro Ultra W

13891547
Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

Designed and developed a compact custom PCB to replace an existing Arduino-based Wi-Fi prototype, integrating Ethernet connectivity, voltage monitoring, and temperature sensing into a single production-ready board. The system was optimized to fit within a 70 mm × 50 mm footprint while maintaining full compatibility with existing C++ firmware. The final design includes an RJ45 Ethernet interface, a 12V input with accurate voltage sensing (0–15V range), and an onboard temperature sensor. A suitable microcontroller was selected for efficiency and reliability, with USB/UART access provided for easy firmware updates. Complete deliverables include schematic and PCB design files, manufacturing-ready Gerbers, BOM, and a bring-up guide to ensure straightforward deployment and validation.

Compact Ethernet PCB Design

13869794
Designed a compact custom control board for a client on Freelancer: a `31 x 121 mm` PCB (max `7 mm` height) that drives two solenoids using `DRV8432` drivers and a `SAM D21` MCU. The project included reverse-polarity protection for a `52 V` input stage, schematic and PCB development, 3D/layout optimization for tight mechanical constraints, and full documentation of design decisions and component sizing.

Solenoid Board R&D

Designed a compact custom control board for a client on Freelancer: a `31 x 121 mm` PCB (max `7 mm` height) that drives two solenoids using `DRV8432` drivers and a `SAM D21` MCU. The project included reverse-polarity protection for a `52 V` input stage, schematic and PCB development, 3D/layout optimization for tight mechanical constraints, and full documentation of design decisions and component sizing.

Solenoid Board R&D

Designed a compact custom control board for a client on Freelancer: a `31 x 121 mm` PCB (max `7 mm` height) that drives two solenoids using `DRV8432` drivers and a `SAM D21` MCU. The project included reverse-polarity protection for a `52 V` input stage, schematic and PCB development, 3D/layout optimization for tight mechanical constraints, and full documentation of design decisions and component sizing.

Solenoid Board R&D

13756091
Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

Built a 4‑channel smart battery charging and monitoring system around an ESP32, designed to safely charge and profile multiple cells in parallel. The firmware coordinates four BQ2589x charger ICs through a TCA9548A I2C multiplexer, measures current/voltage using ACS781 sensors, and drives RGB status + load control via 74HC595 shift registers. It provides real‑time telemetry (JSON over serial), per‑channel status reporting, and load‑based capacity estimation, with a clean modular C++ architecture (DeviceManager/ChannelManager) developed in PlatformIO.

ESP32 Controlled Li-ion Battery Test

5.0 · 86 Reviews
86 Reviews
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Ashish

5.0

₹5,000 INR

6 minutes ago

ESP8266 MCU PCB Design & Schematics

Samuel worked in a highly professional manner and completed the project on time and within budget. He addressed all of our comments and change requests promptly and without any hassle, demonstrating excellent communication and attention to detail throughout the project. I would definitely work with him again and highly recommend his PCB design services.

Circuit Design
LoRa

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Flag of UNITED STATES

Lewis

5.0

$135 USD

4 days ago

Compact SHT45 Sensor PCB Design

Outstanding work. Was very focus on my project and completed it ahead of schedule.

Electronics
Microcontroller
Electrical Engineering

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Flag of ESTONIA

Ilja

5.0

€35 EUR

7 days ago

PCB Layout Optimization in Altium -- 2

Excellent PCB designer! The work was completed professionally, with great attention to detail and high quality. Communication was excellent throughout the project, and all my questions and requested changes were handled quickly. The final design met all my expectations, and I would definitely recommend this freelancer to anyone looking for reliable PCB design services. I look forward to working together again!

Electronics
CAD/CAM
Electrical Engineering
PCB Layout
Circuit Design

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Flag of CANADA

Inotronix

5.0

$1,150 USD

10 days ago

ESP32 BLE firmware with ESP-IDF on VSCode

Amazing freelancer, really knows what he is doing. Highly recommend him to anyone. Will work with him again in the future.

Electronics
Microcontroller
Electrical Engineering
Bluetooth Low Energy (BLE)
Firmware

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Flag of INDIA

Sai

5.0

₹23,250 INR

18 days ago

Bluetooth Trackpad Development

I had an excellent experience working with Tshibangu S on my PCB design project. They demonstrated strong technical expertise, understood the project requirements quickly, and delivered a clean, well-organized design that met all my expectations. Communication was prompt and professional throughout the project. They were receptive to feedback, implemented revisions efficiently, and provided valuable suggestions that improved the overall design.

Electronics
Mobile App Development
User Interface / IA
PCB Layout
Product Design

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Experience

PCB Design Engineer ( Altium, KiCad, Eagle, EasyEDA)

Jan, 2021 - Present

•

5 years, 6 months

SAMFREVOLT

Jan, 2021 - Present

•

5 years, 6 months

Responsibilities include completing the designing of PCB projects from scratch to final Gerber data output taking into account the state of the art designing tools for rigid, flex boards by using such advanced CAD tools as Cadence OrCAD & Allegro, Altium Designer, KiCad, Eagle, easyEDA

Flag of TUNISIA

Ariana, Tunisia

Jan, 2021 - Present

•

5 years, 6 months

HARDWARE DESIGNER

Jan, 2019 - Present

•

7 years, 6 months

ST-CONCEPT

Jan, 2019 - Present

•

7 years, 6 months

it's been 5 years that I currently hold the position of hardware designer at ST-concept which is a start up focusing on electronic design.

Jan, 2019 - Present

•

7 years, 6 months

Education

Université Tunis Carthage

2021 - 2023

•

2 years

mechatronics engineer

Flag of TUNISIA

Tunisia

2021 - 2023

•

2 years

Certifications

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