Free Simple Circuit Diagram
As an alternative to bipolar transistor, a lamp flasher can be built by using two power FETs. Like other flasher circuit, this circuit alternately switch the two lamps off and on. It is based on a simple astable multivibrator that formed by the two power FETs. To modify the flashing rate, just remember that flash rate is determined by the […]
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A one shot multivibrator generate a fixed width pulse at the output when the input is triggered. This fixed width output should be consistent, regardless the width of the input trigger. One example of one shot multivibrator circuit is shown in the following schematic diagram, which uses LM139 as the main active component: The width of the output is determined […]
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This bi-stable circuit uses an op-amp, acts similar with RS flip-flop. Bi-stable circuit is a circuit with two stable states, low and remain low until set is triggered, or high and remain high until reset is triggered. Here is the schematic diagram of the circuit:
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This LED flasher circuit uses 555 IC, and is capable of driving up to 10 LEDs. The good news is, the use of multiple LEDs in series doesn’t increase the power consumption when compared with using only two LEDs. If we use only two LEDs, then we have to sink the power into a current limiter resistor, which dissipate the […]
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