Hello, sadly I cannot find a specific topic posting finished projects, so @admins feel free to move this topic.
Background: I'm a RC-car driver and often use temporary race tracks for bashing with my friend. So this project was born: IR 2.4GHZ multi client Lap timer for Arduino Features: Highly transportable IR-tracking lap timer for up to 6 different RC-cars.
Function description: You need at least 3 devices:
- IR-generator pillar: This device contains an Arduino mini generating a very short IR code. Via 3 IR-LED’s the code is beamed permanently
- Transponder box within car: Arduino Nano/mini + IR receiver + NRF24L01 module. If a IR signal code is recognised (car is passing the IR pillar) a short unique code will be send via the NRF2401 module to the master box. Up to 6 different transponder can be used (Currently only 2 are implemented)
- Master Box: Arduino Nano + NRF24L01 module + Encoder + Display. Collecting the transponder data for generating lap times,…
The whole project (code, details, photos) can be downloaded here: https://drive.google.com/folderview?id=0B3sgtwOcRTSUaW9MazM2MjljSlE&usp=sharing
Edit: Whole project is on instructables: http://www.instructables.com/id/IR-24GHZ-Multi-Client-Lap-Timer-for-RC-Cars/