Wireless Quiz Buzzer System using Arduino, nRF24L01 and TP4056 lithium battery charger

Part 2: I show you how to make a wireless quiz buzzer system using nRF24L01 modules and Arduino’s. The buzzers are totally self-contained including a built in lithium battery with charger. Part 1 was a wired version, which you can see here: The main controller, also wireless, now has the option to disable buttons from people who have already guessed an answer and has a 3.5“ socket to connect the audio output to an external amp. I’ve also left the USB port exposed for future use in case I want to build an application that can use the button data in real time as well as control them I put this to the test last night with a special Jubilee quiz! worked perfectly... Support me to continue making videos: Patreon: Discord: Source Code & Schematics: Tip: If you have any issues with the DFPla