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ICStation DIY Kit Clap Switch Suite Sound Sensor Module DIY Electronics

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5 1
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Description:
 Clap switch kit is composed of a number of resistors, capacitors and transistor amplifier circuit. Circuit is simple, welding easy, inexpensive, and can be widely used in voice-activated switch.

I. The Electrical Parameter
Operating voltage: 4.5 ~ 5V
PCB size: 28 * 49mm


II. The Circuit Theory
This circuit mainly by the audio amplifier circuit and a flip-flop circuit.
Q1 and Q2 form a secondary audio amplifier, an audio signal received from MK1 C1 is coupled to the base of Q1, the amplification is fed directly from the collector to the base of Q2, the collector of Q2 to obtain a negative square wave with to trigger the bistable circuit. R1, C1 limit the frequency response of the circuit for the high sensitivity range of about 3kHz. When the power is turned on, the state of the bistable circuit is off Q4, Q3 saturated, D3 does not shine.
When MK1 to a control signal output after the two-stage amplification of a negative square wave, after the differential processing by the negative spike D1 added to the base of Q3, the circuit rapidly inverted, D3 is illuminated. When MK1 again received control signal, the circuit took place flip, D3 extinguished. The board reserved for external control devices connected to terminals J1, can be a voice for other devices connected via J1 relay. (When connected to both ends of the relay coil relay to be anti and a diode)

This circuit uses a DC 5V power supply, turn off the machine when the LED current of 3 mA, the LED lights up the whole current of 6mA.

III. Circuit Schematics

IV. Parts Lists

serial number
componen ts
value
label
serial number
componen ts
Value
label
1
resistance
470
R7
10
1uF/50V
C2
2
 
1K
R14
11
 
47uF/16V
C4
3
 
2.2K
R1 R8 R12
12
1N4148
D1 D2
4
 
4.7K
R4 R6
13
LED
Ф 5 red
D3
5
 
10K
R5,R8,R10 ,R11,R13
14
Transistor
9013
Q1----Q4
6
 
47K
R3
15
Microphone  
9767
MK1
7
 
470K
R2
16
terminal
2.54 2P 卧式
J1
8
103
C3
17
power   line
2.54 2P 单头
1
9
 
104
C1 C5 C6
18
PCB
FR-4 28*49
1


Soldering to note:

Arrow pointing at the two pads, need to use wire links


As shown below:

 

Why change it:
when the effect of the wiring board, the figure where the red circle there was a small mistake, take the line did not come on the pads, a little bit worse, make friends, their answer it by the above method.

Postbag From ICStation Outstanding Partner Julian Ilett:

 

Feedback

By
Rating: [5] 5 of 5 Stars! Date Added: 2017-02-16 00:51:18
very happy with the diy kit and fast delivery to Finland will highly recommend many thanks

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ICStation DIY Kit Clap Switch Suite Sound Sensor Module DIY Electronics
$1.96
$2.39