Latch circuits based on transistors, to switch on and off a load with a momentary input signal
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A latch circuit is supposed to lock on and off a load (such as a relay coil or a led light), through a momentary input signal.
At the start condition both transistors and the led light are off, so at the node 2 we have a positive signal.
When you press the button both transistors are enabled, but the coil keeps off because it is supplied by 2,5 Volts.
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Jercio LED
roelh
Dejan Vasić
Szabolcs Lőrincz
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