The NRF24L01+ Arduino wireless transceiver shield is ideal for a wide range of applications. For instance, it can be used in home automation projects to control lights, fans, and other appliances ...

[Ralph] wasn’t satisfied with the required 5 control pins to drive his nrf24l01+ transceiver module, so he used this circuit needing just 3 pin using an ATtiny85. One of the key components wa… ...

All of this would probably require more temporal resolution than you’re going to get out of a microprocessor running Arduino code, but should be possible using hardware timers.