Bird Home Automation, a Berlin-based manufacturer of ‘DoorBird’ IP access control devices, is expanding its product portfolio, to include door intercoms with an integrated fingerprint sensor. IP video ...

In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...