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FET Tester Schematic Diagram
   Typical example of specialize transistor tester Okay, this month newsletter is about building your own FET tester and this article was contributed by Mr Behzad.  FET Tester Schematic Diagram This is a simple and easy to build FET tester. It can test N-CHANNEL and P-CHANNEL FET. These are the following components that you need: 1) 2 pcs of red color LED 2) 1pc of green color LED 3) 1pc of DPDT switch (DPDT stands for Double Pole, Double Throw) 4) 1 pc of On/off switch 5) 1 potentiometer 10k ohms 6) 2pcs of resistor 470 ohms 1/4 watt 7) 1pc of resistor 470 K ohms 1/4 watt 8) 2 IC sockets- 8 pins dip 9) 1 small pc of project/circuit board 10) 1 pc of knob for the potentiometer 11) 1 Project box 12) 1 pc of 9 volt battery 13) 1 pc of 9 volt battery holder/connector   The IC sockets are good for holding the FET during testing time. We use just three pins of each socket for the Gate (G), Drain (D) and Source (S). One socket is for N-CHANNEL FET and the other one for P-CHANNEL FET. The DPDT switch is good for changing the mode of tester from testing N to P-CHANNEL FET. Another advantage of this tester is that if you have been using multimeter to test on FETs, you will find that our hands is too big for the small FET pins (TO- 92 Case). Thus by inserting the small FETs into the IC socket, you will eliminate the error of one finger touching on another pin during testing time using the multimeter. Test Result If the FET is shorted one of the red LED will lit. In order to confirm that the FET under test is good even if you increase the potentiometer to maximum the red LED should not lit otherwise the FET is bad or leaky. For a good FET the green LED will light up.    Thank you
اللهم انتصر لنا انتصارك لأحبابك على أعدائك اللهم لا تمكن الأعداء فينا ولا تسلطهم علينا بذنوبنا ..
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اللهم انتصر لنا انتصارك لأحبابك على أعدائك اللهم لا تمكن الأعداء فينا ولا تسلطهم علينا بذنوبنا ..
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