On board transistor tester / Azizi Ala and Mohd Irwan Baharudin

This is a new type of tester equipment. This will check the transistor condition without remove the transistor from printed circuil . This circuit tester can be divided into 2 major part which is The Multivibrator and D-Flip-flop. The multivibrator will oscillates frequency at 500khz and the output will give the clock input or trigger to D flip-flop Ic. Transistor condition can be shown by indicator of LED The condition can be divided into 4 type which is short C/E, open C/E, Good NPN and GOOD PNP.