No, current pass through the circuit when the prob of circuit
is not touching any circuitry.
The base-emitter junction of the BC557 and the voltage across the green LED, the plus voltage across the red LED and base-emitter junction of the BC547 is ≈ (approx)= 2.1v + 0.6v + 1.7v + 0.6v = 5v this is greater then we supply voltage.If the circuit detects low
voltage (less then 2.3v), the green LED illuminates and the BC557 is turned on.If the circuit detects high voltage {above 2.3v} the green LED illuminates and the BC557 is turned on.
is not touching any circuitry.
The base-emitter junction of the BC557 and the voltage across the green LED, the plus voltage across the red LED and base-emitter junction of the BC547 is ≈ (approx)= 2.1v + 0.6v + 1.7v + 0.6v = 5v this is greater then we supply voltage.If the circuit detects low
voltage (less then 2.3v), the green LED illuminates and the BC557 is turned on.If the circuit detects high voltage {above 2.3v} the green LED illuminates and the BC557 is turned on.
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| SIMPLE LOGIC PROBE |
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