User Friendly Optocoupler Tester for Electronics Enthusiasts and Professionals
ab 7,73 €
If the indicator light is always on or off, remove the optocoupler from the circuit board and insert it into the optocoupler seat of the breadboard to confirm the test results again. Confirm the optocoupler PIN1 (the pin marked with a small dot on the test board also has a corresponding pin 1).
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