MAKE AN LED AUTOVOLT, ZENER, BATTERY VOLTAGE TESTER || CREATIVE IDEAS FOR USED GOODS

In this video I use an old adapter that is no longer used or may be damaged. I use it as a test tool for LEDs, zener diodes and battery voltage. This tool of course still has its shortcomings.
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[@joko2696]

Good

[@SobatElektronik]

kaka mang mantafff banyak kreatif