Sonic remote control light switch circuit (2)

The SKⅣ integrated circuit has the following characteristics: ① It needs to sound three times continuously within a specific time (Ol-iOs)
before the level of the circuit output terminal, i.e. pin ⑩, can flip; ② After three consecutive
sounds , Its additional output terminal, the 10th pin, can obtain a high-level
output of a specific width (O-iOmin adjustable) for load delay control.
    B in the old one is an electret condenser microphone, used to receive controlled acoustic signals. s is the voice control sensitivity selection
. When moving to position ①, the voice control command is [1. The ① pin is connected to the integrated circuit. At this time, a two- stage inverting amplifier in the integrated block is used. The voice control sensitivity is the highest, but it is easy to produce white excitation. Turn to the ② position, and a two-stage inverting amplifier
in the integrated block is used . The sound control is
The digging sensitivity and stable P soil are both good; when dialing to position ③, there is only one stage
inverting amplifier in the jr integrated block. Although the Lu control has the lowest sensitivity, the stability is the best. Readers can choose according to their needs. R,
and ' determine the length of the specific time of the circuit. If the resistance and capacitance value is large, the specific time will be long, and vice versa. If
the user continuously high-fives once in a specific state, the ⑩ pin will jump from the original low level of lb to a high level. vr is turned on
, the relay K is activated, and its moving contact kl is closed, and the light E Lights up; if Ran high-fives
three times in a row at a specific time, the circuit flips and pin ⑩ outputs low level. VT is cut off, k1 jumps open, and the electric spider goes out.
Since this circuit adopts a specific method of continuous sound within a certain range, it will only operate when it is turned on. Otherwise, there will be no response, so
the anti-interference performance of the circuit is significantly improved. RP is the bias resistor of microphone B, and RP is the resistor of microphone B. The value can be determined by
the sensitivity of the microphone.
    The power supply of this machine adopts w1108c16 voltage conversion module, which can directly convert 220V AC power into
6V direct comb voltage for the SKIV integrated circuit. K should use a small electromagnetic relay with a working voltage of 6V,
such as JZC-22F', DC6V type, etc. CRZ is available for B. Type 113F isostatic plate condenser microphone. Other components have
special requirements.