Transistor - Diode tester
Before many years ago,i had bought a kit transistor-diode tester,and with soldering iron i stick the electronic components over to PCB,many years later i decided to put it inside in old mobile phone base charger,
it work fine for test transistor if it is PNP-NPN,if it is good or not,and make and diode test.When the transistor it is PNP flash the one led left side,and if it is NPN the led from the right side.
When the transistor it is not good or not flash the led,or flash and two leds like flip-flop.If the diode it is good flash the one led,are not good flash and two leds like flip-flop.
| Here it is the PCB with componets,and with 2 screws to touch it with plastic base | Here i make a test at one diode | Here i make test at one transistor | ||
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| I put from down side 4 new small sponge | And here it is complete. | Click over to photo for you see video. | ||
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