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2 circuits

Multimeter Optocoupler
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Battery Resistor Switch Lamp LED Multimeter Power Source Fan Capacitor Diode Oscilloscope Transistor Relay Voltmeter/Ammeter Potentiometer Fuse Transformer Buzzer Inductor Bell Logic Gate LDR Op-Amp IC 555 Wattmeter MCB LM317 Optocoupler
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