Supply Voltage Monitor with 555 IC

This is a supply voltage monitor circuit, an indicator to show if the power supply is in good condition. Designed using the IC 555 timer, this circuit will flash the LED1 when the supply voltage surpass preset level.  With flashing indicator, at least there will be two benefits, first, the power consumption will be lower since the indicator doesn’t have […]

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Power FET Lamp Flasher

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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