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Cmos logic probe

2017-08-18 04:54  
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The logic probe can indicate four input states, as follows: floating inputa€”all LEDs off
Cmos logic probe

logic 0 inputa€”D2 switched on (D3 will briefly flash on); logic 1 inputa€”Dl_ switched on; pulsing inputa€”D3 switched on, or pulsing in the case of a low frequency input signal (one or both of the other indicators will switch on, showing if one input state predominates).

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