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AUDIBLE_VOLTMETER

2015-03-23 02:18  
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AUDIBLE_VOLTMETER
The audible voltmeter can be used to test for ac or dc voltages in a circuit. With S1 closed, the circuit can be used to test for voltages between 4 and 24 V. When S1 is open, it can be used to check for the presence of voltages of up to 200 V