This device enables generic loads (here: valve actuators) to be controlled by TCP/IP. The power for the relay card and the Arduino Pro MINI is derived by a POE 802.3af ethernet switch. A Texas ...

Download "sms_call_gate.ino" Sketch from the repository and Upload it to Arduino. NOTE : Make sure to replace your number in code at line number 71. The number must be in international format. After ...

The use of transistors for switching things ON and OFF is a key feature of proper hacking. The ability for bipolar transistors to turn things ON and OFF is one of the less known uses while transistors ...

Relay Control for Extreme Loads: Relays perform a similar function to transistors, allowing a separate electrical signal to be controlled by an output. As noted here, while they can sometimes be ...