A four channel relay board which can be controlled by a wireless remote which is connected to the receiver through a wireless RF link. The relays can be used to control 240 V appliances, motors, other electronic circuits, etc. The board can operate within a range of 100m when the remote is in line of sight and around 50m when indoors.
Each relay board comes with a adjustable address option which can be used to operate multiple remotes in the same area by assigning different addresses to each relay board. The remote provides 4 push switches which can be manually operated to control the relays. The input pins are also brought out to a row of header pins, which can be used to connect the remote to a microcontroller or an external circuit and control the relays through logic signals.
The RF link on this board works on the 433 MHz frequency. Both the transmitter and the receiver come with an onboard antenna and offer a compact and simple design. The boards also support an external antenna for better range and reception.