Go up first the road of Electromechanical of one key switch of a low power comsumption, the characteristic of this circuit depends on closing all dynatron when machine to end entirely scarcely bad news report.

 

The principle is very simple:

 

The output that uses Q10 and input position are opposite (blame door) the electric current of character and capacitance accumulates character. The emissive knot of the Q6 when firm electrify and Q10 all by 10K resistor short circuit so Q6 and Q10 all end, right now electric current of bad news of actual measurement circuit is 0.1uA only, l_out output is high, h_out output is low. Right now C3 passes R22 slow charge to be equal to VCC voltage finally, should press the C3 after S3 gives Q10 base discharge through R26, q10 is rapid and saturated, q6 also because this is saturated, h_out turns into tall n, to Q10be when C3 discharge knot pressing falls the C3 when 0.7V is controlled discharges no longer, if key-press flick C3 will discharge further,right now the saturation of Q10 is pressed fall 0.3V left and right sides, should press again S3, q10 ends namely.

 

This circuit is OK and perfect solve key-press shakes and grow to jump by key-press the problem of archives, switch condition retroflexions the moment that produces in key-press contact only, existence of even if key-press shakes later or grow the circumstance switch condition that presses key-press to won’t be affected. Because the resistance of R22 is very great,this is (opposite R23, r26, after the voltage when C3 capacitance stabilizes R25) , r22 is far the switch position that can’t change Q10, the C3 after the state that R22 wants to be able to change Q10 must want to wait for S3 flick will shed the small electric current of R22 to accumulate memory, the instant of repass S3 contacts fast big electric current to release the position that changes Q10 thereby later.

 

 

 

The prototype of this circuit comes from Internet, parameter has adjust, principle and likeness of circuit of the first low power comsumption here no longer give uncecessary details. The subject that this invitation views again after two circuit understand above deep bolts 3 archives circuit:

 

This circuit is actual the confluence that is before this post two circuit, can come true low power comsumption bides his time and 1 archives, 2 archives, pass 3 grade such as machine. Electrify at the beginning of as a result of Q1, q4, the Be knot of Q5 is shunt-wound resistor, accordingly all dynatron end circuit low power comsumption bides his time, c3 begins to charge VCC voltage. Should press after S1, q5 saturation, at the same time Q1 also because this is saturated, q4 of L_out1 output low n ends —>Q3 ends, Q2 is saturated, c3 discharge is pressed for the saturation of 0.3V(Q5 fall) the left and right sides. Press again S1, q5 ends —>Q2 of L_out1 output tall n ends, q4 saturated L_out2 outputs low n, the meeting defer of Q3 of delay time action as a result of R4 and C1 is saturated, base of the Q3 after can making sure Q2 ends completely just can be low n, because of this Q2, q3 won’t saturated. Should press again S1, q5 by end turn into saturated L_out1 outputs saturation of low n —>Q2 again (at the same time Q4 ends) , —>Q1 of Q3 saturated defer ends, circuit is entered bide one’s time condition.