For the transmitter, he turned an Arduino Pro Micro into a USB sound card which he could plug into his laptop. That outputs both the audio signal and a 40 kHz carrier signal, implemented using the ...

1. Description This tutorial shows how to establish a basic RF communication link using cost effective wireless modules (434 MHz transmitter and receiver). The use of low-cost RF modules could be ...

Use the power amplified NRF24L01 with antenna on the receiving end to achieve a total 1KM of range with the transmitter. Use I2C connector on top of Arduino Pro Mini to give the receiver a display for ...