Sound Activated Switch circuit | Electronic Schematic Diagram https://electronicscheme.net Schematic Diagram & PCB Design Sun, 05 Jul 2015 06:07:31 +0000 en-US hourly 1 https://i0.wp.com/electronicscheme.net/wp-content/uploads/2017/05/cropped-transparent_text_effect.png?fit=32%2C32&ssl=1 Sound Activated Switch circuit | Electronic Schematic Diagram https://electronicscheme.net 32 32 129969089 Sound Activated Switch https://electronicscheme.net/sound-activated-switch/?utm_source=rss&utm_medium=rss&utm_campaign=sound-activated-switch https://electronicscheme.net/sound-activated-switch/#comments Fri, 09 Jul 2010 08:58:07 +0000 http://electronicscheme.net/?p=473 This is a sound activated switch circuit. It’s will turn on and turn off based on a loud sound such as clapping your hands. You […]

The post Sound Activated Switch first appeared on Electronic Schematic Diagram.]]> This is a sound activated switch circuit. It’s will turn on and turn off based on a loud sound such as clapping your hands. You can adjust the sensitivity (how loud of a sound will activate the circuit) from a pin drop to a Mack Truck Horn. Very practical for a variety of projects. Add a relay to turn on a light when your dog barks, or set of a siren when an intruder makes a loud noise.

Here the circuit diagram:

Sound Activated Switch circuit diagram

This circuit operates on 9 VDC battery or you may use a DC power supply instead of a battery. Electret microphone used to catch the sound (very sensitive). The sensitivity can be adjusted via potentiometer.

Components List:

R1, R5, R16 = 10k?
R3 = 22k?
R2, R6, R9, R13 = 220k?
R4, R10, R12, R14 = 100k?
R7 = 270k?
R8 = 4.7M?
R11 = 1M?
R15 = 330k?
R17 = 4.7k?
P1 100k? Trim Pot		 C1, C3 = 10nF
C2, C4 = 100nF
C5, C6, C8, C9 = 1nF
C7 = 1uF/16V Electrolytic
C10 = 100uF/16V Electrolytic
Q1 = 2N3904
Q2 = MPS6531
U2 = 4001 Integrated Circuit
U1 4011 Integrated Circuit
LED = LED Red
MIC = Electret Microphone

PCB Layout:

Sound Activated Switch pcb design

Download the manual instruction for this sound activated switch circuit:

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Sound activated switch kit manual

1 file(s) 112.65 KB
Download Kit Manual

This circuit kit available at http://www.electronickits.com/kit/complete/elec/ck1607.htm, go to that page to buy the kit.

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