This circuit is powered using a 12 volts DC power supply , so the relay used for this project must be a 12 volts relay . This circuit is working very simple , when both plates of the sensor are ...

The circuit is too simple so that it can be enclosed in a small box. A 12 volt miniature battery is used to power the circuit. Two transistors T1 and T2 are used as electronic switches to turn on / ...

Flickering LED Circuit. 16 Comments . by: Nick Caiello. October 30, 2008. Title: Copy. ... The code switches the LEDs on and off randomly for a flickering effect and is based on this instructable.

With the circuit values shown, R2 will drop a bit less than 5 V before D3 turns on. Prior to turn on, D2 remains back-biased and no current flows through the LED (D1).

A poor-quality LED bulb isn't the only thing that can cause the glow. If you're using switches with motion sensors or timers, the LED bulb may draw power from their circuits and emit a faint glow.

The Fig. 1 example includes LED loads D1 + D2, D3 + D4, D5 + D6 and a power-supply output voltage, with a constant output current, providing the circuit input voltage (V IN).

Learn about symbols for electrical components and how to draw circuit diagrams. Bitesize Scotland Science article for learners at Second Level Curriculum for Excellence.ls explained for curriculum ...