Hey guys. I have been trying to build a lap timing device that times my laptimes around a track with my bike. i have built something that trips with a laser but only one person can ride then. What I want to do is build a device that can time multiple bikes at the same time.
Is it possible to use radio transmitter and receiver devices such as the nrf24L01 or the 433MHz units to act as timing devices?
I have thought about this and as far as i can understand you will be able to transmit unique ID's for each different bike if they all fitted with a transmitter. However the part that i am not sure about (not even sure if it is possible) is how do u ensure the unique ID is sent at the exact same spot each lap? Like when the bike gets closer to the receiver the receiver will pickup the unique ID and do its thing and display the time but how can i make sure it picks up the unique ID at the exact same place every time?