It is very easy to build an “SMS-controlled relay” with the help of a cheap GSM modem module and a small microcontroller board. Here, I’m using the SIM800L and Arduino Nano V3 to develop a nifty ...
Raspberry Pi users may be interested in a new 8 channel relay board named the PiRelay 8, specifically created for the Raspberry Pi range of mini PC systems. The relay board allows you to connect up to ...