GREAT IT Electronic Acoustic Clap Control Switch DIY Kit Sound Sensor Electronic Circuit DIY Suit Integrated PCB Module
This circuit is mainly composed of audio amplifier circuit and bistable trigger circuit. Q1 and Q2 constitute a secondary audio amplifier circuit. The audio signal received by MIC is coupled to the base of Q1 through C1. After amplification, the collector is fed directly to the base of Q2. A negative square wave is obtained at the collector of Q2, which is used to trigger the bistable circuit. R1 and C1 limit the frequency response of the circuit to a high sensitivity range of about 3kHz. When power is switched on, the state of bistable circuit is Q4 cut-off, Q3 is saturated, and LED 1 is not bright. When MIC receives the control signal, it outputs a negative square wave after two-stage amplification. After differential treatment, the negative spike pulse passes through the base of D1 and Q3, which makes the circuit Flip rapidly and the LED light up. When MIC receives the control signal again, the circuit flips and the LED goes out. If the circuit of LED lamp is connected with other circuits, the voice control of other circuits can also be realized by J2.
Comment Designator Footprint Quantity
104 C1, C5, C6 CAP 3
1UF C2 CAP5 1
103 C3 CAP 1
47UF C4 CAP5 1
4148 D1, D2 DIODE0.4 2
LED D3 LED5 1
CON2/2P插针 J1 SIP-2 1
CON3/2P插针 J2 SIP-3 1
MICROPHONE2 MK1 MIC 1
S9013 Q1, Q2, Q3, Q4 PNP-DIP 4
2.2K R1, R9, R12 AXIAL0.4 3
470K R2 AXIAL0.4 1
47K R3 AXIAL0.4 1
4.7K R4, R6 AXIAL0.4 2
10K R5, R8, R10, R11, R13 AXIAL0.4 5
470 R7 AXIAL0.4 1
1K R14 AXIAL0.4 1
PCB SSY-M04 1
1005001629844480 - greatit