RFID Journal announced today that Hewlett-Packard (HP), Avery Dennison and Impinj will be among the technology companies exhibiting at RFID Journal LIVE! Brasil 2013. The conference and exhibition ...

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 ...

For one, the sound doesn’t directly control the solid state relay used in the fan controller. When the microphone equipped Arduino detects enough noise, it will start a timer that keeps the fan ...