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Thursday, January 14, 2010

Simple MOSFET Tester Circuit

This is a simple design circuit for test the MOSFET condition. In this circuit included in the category astable multi vibrator. This circuit is used to test N-MOSFET (the power kind e.g irf830), whether it works or not. If it is not working, the LED will not flash. If MOSFET is working it will operate in the astable multi vibrator circuit causing the Led to flash. This is the figure of the circuit.


To make the circuit cheap, the other half of the astable utilizes an NPN transistor. This circuit can test almost any NPN transistor. As a common emitter buffer that also drives the led as it receives pulses from the MOSFET drain, this circuit uses the NPN transistor.

Note:
Diode that used in this circuit is a light emitting diode.

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