How to make amazing idea with Syringe
Hello . Today we want to teach how to make a simple voltmeter. We make this voltmeter with several LEDs, several resistors and several diodes. In addition, this voltmeter does not need a specific polarity and regardless of polarity
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Required electronic components:
Resistor 10K
Diode 4007
Diode zener
Led
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#voltmeter#indicator#syringe