Measure if a mountain biker stops at a sign. If confirmed, open a gate and once they have passed the gate, close it and begin a LED timer display sequence.

For our mountain bike races, there is a need for competitors to stop at a stop sign on the course. Rather than have a volunteer stand at the stop sign to check that a competitor comes to a stop, it might be easier to develop an electronic solution. This stopping is necessary to ensure all competitors start from the same location.

I think the electronic part of the project is relatively simple for the experienced Freelancer. However, some testing/adjustment may need to be made to the sonar sensor to ensure it is working at desired. This system will be deployed outside and I have not been impressed with PIR sensors in the past - so hopefully the Sonar Sensor solution may work (I am also open to any other ideas a Freelancer may have!)

The adjustment will come in the measurements and what we determine as a 'stopped' rider and 'departed' rider. The most important thing here is consistency. I don't mind if we have a little 'play' in the system - as long as its easy to understand and the results are replicated.

Ideally, I would like the solution mounted to a pole as shown in the attached images. I am not expecting the Freelancer to undertake fitment to a box or pole, but please bear this in mind regarding mounting and setup.


- I have several Arduino boards and batteries from an unfinished project that I could use

- The most affordable sensors I have found would be these [login to view URL] and picture attached - but I am open to suggestions.

- I need to construct 7 of these units.

Please see the accompanying images which offer some more explanation of the desired system.

If you have any questions, please ask.

Skills: Arduino, Electronics

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About the Employer:
( 14 reviews ) Mandurah, Australia

Project ID: #18896528

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Greeting there , I could absolutely help you with your Arduino project i am very excited work on your project and help you get it done in short time About my experience : [login to view URL] More

$555 AUD in 10 days
(34 Reviews)

14 freelancers are bidding on average $634 for this job


Hi,client. I have 15+ years experience in a circuit, PCB design, manufacture and assemble, and firmware coding. I had developed many products ago using various microcontroller including STM32 serial, Arduino, Raspb More

$1000 AUD in 30 days
(39 Reviews)

Hello sir, I have experience in designing electronics circuits and can make your project. i will make your project completely on my side and will deliver a working prototype. I can also develop hardware compatible and More

$700 AUD in 20 days
(32 Reviews)

Hello, Have a great day. We will ship fully working prototype as you needed. We will keep provision of Remote firmware update so that onsite testing can be done. Please feel free to contact us. Best Regards, Shah More

$1500 AUD in 30 days
(44 Reviews)

hi there i am an electrical engineer with 8+ years of experience related to arduino and sonar. i can design this project for you and can ship you a working prototype to you. let me know if you are interested.

$1000 AUD in 10 days
(27 Reviews)

Hello there, I am an Electrical Engineer by profession and have been doing Arduino projects for a while now. I have worked with quite a lot of sensors and know all about configuring and debugging them. You can visit More

$555 AUD in 10 days
(18 Reviews)

Hello I have got your job posting “Measure if a mountain biker stops at a sign. If confirmed, open a gate and once they have passed the gate, close it and begin a LED timer display sequence.” and I am very much More

$400 AUD in 7 days
(35 Reviews)

Hi sir. I am an electronics engineer with experience in embedded system design.I have rich experience on Ardunio, various Sensor and LCD. I have understood your requirements. and would like to discuss it in more deta More

$800 AUD in 10 days
(9 Reviews)

Hi, I am interested in your project. You can see my projects on [login to view URL] and as well as on [login to view URL]

$444 AUD in 10 days
(9 Reviews)

Hello! I had gone through your project details. I can assist you in developing such device. Following will be project layout:- 1. Preparation of flow layout of program as per your requirement. 2. Setting up o More

$250 AUD in 10 days
(13 Reviews)

Yes Buddy, its me Imad, have done 200+ projects regarding matlab, arduino, c#, vb dot net, web dev and android,,,,,,,,U will feel brotherhood,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

$250 AUD in 10 days
(22 Reviews)

I'm reading your project and analyzing the data, for programming I can excel, I think there is an electrical part that must be analyzed and treated, if you allow me to work on this project I will deal with an optimal More

$555 AUD in 10 days
(0 Reviews)

Hello I am Electronic Engineering and have working experience of more than 3 years of teaching and developing products based on Arduino specially. would love to help you.

$250 AUD in 10 days
(0 Reviews)

Propose using a ToF sensor such as the VL53L1X. It has a much narrower detection cone that ultrasonic sensors.

$611 AUD in 10 days
(0 Reviews)