Features Controls the UHF Remote Mains Switch Up to 10 UHF Remote Mains Switch units can be controlled 16 encoder selections 200m range On/off switching Handheld operation 9V battery supply Transmit indicator Transmit error indication

If you want to control the UHF Remote Mains Switch in a stand-alone application, then you need to also build this UHF transmitter. As shown in the photos, it’s housed in a plastic case with two pushbutton switches for on/off switching. Press the On button and power is applied to the mains socket on the UHF Remote Mains Switch. Alternatively, press the Off button and the power turns off. What could be easier?

The front panel also provides access to a small rotary switch. This selects one of 10 "identities" which means that the transmitter can control up to 10 separate UHF Remote Mains Switches. This rotary switch is adjusted using a small blade screwdriver.

Immediately above the "On" button is a "transmit indicator" LED. This briefly lights each time a transmission is sent (ie, when ever the On or Off buttons are pressed). However, if there is an error, this LED will flash three times in a 1.5-second period.

Typically, an error will be indicated if both switches are pressed simultaneously or if a switch is pressed too briefly. In either case, it’s simply a matter of pressing the desired switch again to send the control signal.