Free Simple Circuit Diagram
A window comparator formed by two op-amps packaged into IC1 is the heart of the circuit below. With this technique, we can detect precisely and symmetrically either the positive or negative peak value reached by the monitored signal. The op-amps outputs are smoothed by C4, R7, and R8, mixed by D1 and D2, and feed the LED driver Q1 with […]
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This is a power on circuit that works temporarily only when the power is turned on, this LED illuminates for a few seconds, then turns off again. This design is eco-friendly since it consumes only a little power at the beginning of the power connection. Here is the schematic diagram of the circuit: The circuit uses the 47uF capacitor that […]
Read moreUsing a dual-colour LED and few surrounding components, we can make a very simple battery monitor. This battery monitor circuit is suitable for monitoring your car battery, enrich your dashboard with cool and functional accessory. Orange colour is produced by LED when the red and green LEDs are illuminted. The red LED illuminates below 10.5v, green LED illuminates above 11.6v, […]
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