Make your own auto volt led tester . We can find out the voltage from an LED with a voltage range of 0 29 Volts.
Parts :
1. 3wires digital voltmeter
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2. Step Up / Boost Converter XL6009
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3. Micro USB DIP Socket
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4. Switch
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5. Multitester Cable
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6. Mobile Adapter
7. Resistor 2.2 Kilo Ohm
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