In Progress

Design A Timing / Speed Circuit

I am building a speed detection system using laser gates but I need a schematic designed for me that will show me how to build this and what chips and other electronic devices I will need. I did find an existing design online which I am basically going to copy except I need some modifications made to this design. Here is a link to the design I found.....

[url removed, login to view]

HOWEVER....I do not want to display / record the time.... I want to display Miles Per Hour (mph). So, for the schematic that is shown in the above mentioned link, I would like an extremely accurate timing circuit instead of the stopwatch he uses in his design. I believe a crystal oscillator will be required for this but I am open to your suggestions. I would like this device to be extremely accurate so I am assuming the timing circuit will need the ability to time in 1/1000th of seconds. I need this circuit to calculate the mph based off the time recorded and distance between "Point A" and "Point B". Here is my explanation in simpler terms....

1. I want a laser and photo-sensor at "Point A". When an object passes through this laser beam, it should start the timer.

2. I want a laser and photo-sensor one inch away from "Point A" which I will call "Point B". When the object passes through "Point B" it needs to stop the timer.

3. I then need this circuit to take the time recorded for the object to pass from "Point A" to "Point B" and calculate the MPH. I would like the MPH reading to display on a 3 digit LED number display.

OTHER DETAILS:

The max speed of objects passing through the beams will be no faster then 150mph. I would like the MPH reading to remain displayed on the LED display until another object passes through "Point A" & "Point B"....at which time the new MPH reading will show up on the display. I would like this to be a battery operated circuit. Please give me your quote for the DESIGN schematic only. I do not need you to physically build this circuit. I can build it and test it myself.

Skills: Circuit Design, Electronics, PCB Layout

See more: take away layout, system sensor, pcb layout online, open gates design, online pcb layout design, online circuit design, layout pcb online, i want to design a building, id design online, i beam design, how to design circuit, find chips, find a design online, detection design, design pcb need, design a circuit online, circuit design com, beam design, pcb online, online circuit, how to design a pcb, how to design a circuit, build a circuit online, pcb design and layout, layout design online

About the Employer:
( 2 reviews ) Hastings, United States

Project ID: #5541481

Awarded to:

kabcpc

Hi! Suggest using Arduino. Here units that you need: - Mega-2560-R3-Mega2560-REV3-ATmega2560-16AU-Board - LCD-Keypad-Shield-LCD1602-LCD-1602-Module-Display - LM2596-BUCK-DC-DC-adjustable-high-efficiency-of- More

$30 USD in 1 day
(0 Reviews)
0.0

12 freelancers are bidding on average $774 for this job

betaenergy

Dear Sir, We are Reserach and Development company whose working area are : -Digital Motor Control -Analog Design -Electronic Design -Power Electronics -PCB design -Embedded system -Matlab -Simulation of ha More

$166 USD in 1 day
(13 Reviews)
4.6
amankaushal90

Hi , I am an electronics engineer by profession and an expert at arduino. I have done this type of project and I can guarantee you work on time with quality guaranteed. Please feel free to contact me by sending a priva More

$90 USD in 1 day
(1 Review)
2.8
HSjith

Hi, I am an electronic engineer. I have more than 5 year experience of designing circuits. I can make a much simpler circuit using microcontrollers. But you need a firmware to run it. What kind of circuit you need? Is More

$66 USD in 1 day
(3 Reviews)
2.7
designvin

Hello, I have a long experience in hardware and software product development and I am bidding this project based on that. I have designed and deployed several microcontroller and microprocessor based products. Can More

$83 USD in 7 days
(1 Review)
2.7
puzzles

A proposal has not yet been provided

$100 USD in 5 days
(1 Review)
2.6
kursadgulereem

Bir öneri henüz sağlanmadı

$30 USD in 3 days
(1 Review)
2.4
MAAM86

+10 years experience in electronics designs. Developed several systems in industrial field. Used most of measurement sensors. I hope i can help you :)

$1300 USD in 25 days
(1 Review)
0.0
chyconsl

HI, I have done similar projects in the past. I will like to use my experience to serve you better. You can trust my sincere indulgence both in quality and time frame. If you will give me a chance, I will ensure that y More

$7368 USD in 1 day
(0 Reviews)
0.0
everhard51

mls/h mtr/h mtr/sec cm/sec time over 2,5cm= the same as 150 mls/hr 150 240000 66,66666667 6666,666667 0,000375 =B3*1600 =C3/3600 More

$111 USD in 3 days
(0 Reviews)
0.0
basit18

Since I have many projects related to different electronics, I usually refer to microcontroller based circuits. Since its a small circuit you can go for 18 pin microcontrollers to employ interrupt based system. By usin More

$45 USD in 3 days
(0 Reviews)
0.0
TankAmit

Hello, I am assuring you the best optimized and low PCB area counts and stable and reliable circuit design.

$40 USD in 5 days
(0 Reviews)
0.0
sharpDressedMan

I have big experience with microcontrollers and digital schematics. So I can do this. Especially since it is a simple project.

$30 USD in 2 days
(0 Reviews)
0.0