Non-two-wire sound and light control stair delay switch circuit (5)

It is a sound and light controlled stair delay lighting switch composed of CD1017, CD4069 and thyristor optical coupler.
Its feature is that different light delay times can be selected by the number of clapping sounds.
    The 220V AC mains power is (1. step-down, VD1 rectifier, vs voltage stabilization and (1: filtered to obtain 12V DC
voltage for the whole machine. C and Rs form a differential circuit. When the power is first turned on, Al (CD4017) ⑥The pin is
high level , the circuit is cleared, the QO terminal outputs a high level, and the inverter outputs a low level via the NOT gate V. The thyristor type
optocoupler A3 (M(]r3041) has no output, transistor VTH j is short, and the lamp F does not light up. The photoresistor RI., NOT gate
VI, etc. form a light control circuit. During the day, RI. is low resistance, and the NOT gate VI outputs a high level, which makes the Al Bi prohibit counting
state , so the "light" ^ The electric light is on. Only at night when RIJ is high resistance and the NOT gate VI outputs low level, that is,
the ⑩ pin of Al is grounded, A1 can count. The sound control circuit is composed of piezoelectric ceramic piece B, NOT r l, NOT gate II, etc.
Complete. If no light is needed at night, as long as clapping hands or making other sounds, the sound signal is picked up by B,
amplified and shaped by NOT gate I and NOT gate II, and the rising edge of the generated pulse is added to the CP end of A for counting. At this time, Qo jumps changes to a low
level, and inputs III to a high level through the NOT gate V, and passes through R; the built-in light-emitting tube of A3 emits light,
both A3 and the thyristor VTH are turned on, and the lamp F is powered on and emits light. When l is turned on, the Ql terminal outputs High level, through VD2, R, charges to f.
, the circuit enters the delay state. When C, the voltage at both ends is charged to the leap value level at which the gate circuit flips, the non-gates
III and IV flip to output l island power half VD6 Add to the ⑥ pin of Al, Al is cleared, Qo outputs high level
A3j VTH is turned off, and the lamp E is turned off. At this time, the charge stored in G can be discharged through VD7, which can prepare for the delay of turning on the light
next time . Circuit The delay time depends on the value of R. and (1.)
    If Lian claps his palm twice, Al counts twice, Qo outputs a low level, and the light E lights up. At the same time,
Q2 outputs a high level, and this high level VD3, R. supplies electricity to G, causing the circuit to enter a delay state. At this time,
the light-on time is determined by the value of R, (1.). If the sound is sent twice in succession, the light is on at the same time, Q3 outputs high level, and
the light The duration of the electric light is determined by the values ​​of R and C. If four sounds are sent in succession, Q4 outputs a high level. Because of
this high level , it is directly added to (. At the end, A1 can be cleared and reset with almost no delay. , lights on: off.
This function is used for venues that need to turn off the lights immediately. The reader can adjust the value of R.-R. to set several
different delay times according to needs.
    Twenty gates] ~ NOT gate VI can A CD4069 six-inverter digital integrated circuit is used. A3 uses
an M()('3041 and other thyristor type optocoupler. Other component parameters are shown in the figure. There are no special requirements.