Optocoupler Tester Tool for 4 Pin Optocouplers USB Power Detection Module
9,81 €
Applicable to 4-pin optocouplers, other types of optocouplers are temporarily not applicable. 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 reconfirm the test results.
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