Auto Adjustable LED Tester/Auto Adjust Voltage . 

Auto Adjustable LED Tester/Auto Adjust Voltage.
How To make a any type LED testing circuit use a led bulb driver.
any type LED testing circuit use only a LED bulb.
USE COMPONENT :-
1/ 9watt LED bulb (230v)
2/ Resistor 330ohm
3/ wire
4/ old adaptor
5/ power 230v ac
⚡230v⚡
out put ±90volt (0v-100v)
:Disclaimer:
This device is completely safe from electric shock but do not touch 2 wires at the same time.
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