We frequently get home automation tips, many of which have simple circuit-based on/off control for lights. [Paulo Borges] has created something quite different, however, with his in-the-wall servo-… ...

AC switch off via remote control and effect on energy consumption Using the remote control to turn off your AC is a common practice. It's convenient and allows you to control the AC from a distance.

You can see above that two Darlington transistors along with their base transistors allow logic signals to switch the relay on and off, driving the motor in one direction or the other based on the ...