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ICStation DIY Kit Clap Switch Suite Sound Sensor Module DIY Electronics

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 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
serial number
componen ts
R1 R8 R12
D1 D2
R4 R6
Ф 5 red
R5,R8,R10 ,R11,R13
2.54 2P 卧式
power   line
2.54 2P 单头
C1 C5 C6
FR-4 28*49

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:



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

First we should say that ICStation doesn't accept any form of pay on delivery.Items used to be shipped after receiving the order info and payment.

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(1) Due to the high risk of package lost recently, we have to stop using the free shipping way these days. Hope for your kind understanding! And the $3 is for tracking number and delivery insurance ^0^ Enjoy order from us. 

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(2) Shipping time 
Shipping time is 7-20 business days to most of countries; please view below table for exactly shipping time to your location. 

7-15 working days to: Most of Asia countries
10-16 working days to: USA , Canada , Australia , UK , Most of Europe countries
13-20 working days to: Germany , Russia
18-25 working days to: France , Italy , Spain , South Africa
20-45 working days to: Brazil , Most of South America countries

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(1)Shipping Fee: Free for the order which meet the following requirements
Total price of the order >= 200USD or Total weight of the order >= 2.2KG

When the order meets to one of the above requirement, it will be shipped for FREE via EMS/DHL/UPS Express to below country. 
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(2) Shipping Time
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Because the package would be returned to the sender if it had not been signed by the receiver in 2-3 day (DHL) or 1 week (EMS,) or 2 weeks (Registered Email), please pay attention to the arriving time of the package. 


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2) Chinese Holiday Reminder: During annual Chinese holidays, services from certain suppliers and carriers may be affected, and delivery for orders placed around the following times may be delayed by 3 - 7 days: Chinese New Year; Chinese National Day,etc. 
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4) Track the order which with tracking number via below links:

Registered Airmail: www.17track.net/en

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ICStation DIY Kit Clap Switch Suite Sound Sensor Module DIY Electronics