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 ...

This circuit works on the principle that the base resistor is chosen to supply just the required current to turn the transistor on such that it remains in that just-about-linear region mentioned ...

The relay would short this junction to ground immediately upon transmitter turn-off. Using the normally closed contacts of the added relay will maintain a short circuit from the A17 Q2 collector to ...

When a Relay driver circuit is used in Sensor based electronic circuits, false triggering may occurs due to unwanted relay clicking. The input signal level is not sharp in most sensor circuits and the ...

1. The well-established relay-driving circuit uses an optocoupler to isolate the grounds and noise coupling between the low-voltage digital-control signal circuit (left) and the relay as load (right).