sound activated relay | Electronic Schematic Diagram https://electronicscheme.net Schematic Diagram & PCB Design Sat, 04 Jul 2015 07:55:08 +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 relay | Electronic Schematic Diagram https://electronicscheme.net 32 32 129969089 Clap On / Off Switch https://electronicscheme.net/clap-on-off-switch/?utm_source=rss&utm_medium=rss&utm_campaign=clap-on-off-switch https://electronicscheme.net/clap-on-off-switch/#respond Thu, 31 Jul 2014 13:18:24 +0000 http://electronicscheme.net/?p=2296 This is the circuit diagram of Clap On / Off Switch. The circuit allows you to operate your lighting or any circuit device which use […]

The post Clap On / Off Switch first appeared on Electronic Schematic Diagram.]]> Clap On / Off Switch Diagram
Clap On / Off Switch Diagram

This is the circuit diagram of Clap On / Off Switch. The circuit allows you to operate your lighting or any circuit device which use 24V / 3A maximum supply, simply by clapping your hands.?It has a relay output that can be used to turn external devices on/off.? This circuit is good and ideal for disabled or elderly people.

Circuit Features:

  • good immunity against surrounding noises
  • ‘1-clap’ or ‘2-clap’-mode selection
  • ‘2-clap’-mode features built-in safety turn-off timer (approx. 5h)
  • output relay ‘pulse’ or ‘toggle’ selection
  • microprocessor-controlled
  • output relay with LED indicator

Circuit Specifications:

  • Supply 12Vdc / 150mA i.e. mains adapter (Order Code 660.446UK)
  • Outputs 1 x SPDT Relays
  • Output Load 3 Amps @ 24V max.

Notes:

  • This circuit available in kit, you can order the kit at quasarelectronics.co.uk, the circuit copyright belongs to them.
  • To switch 220V AC, you may try to find suitable relay meet your requirement.
The post Clap On / Off Switch first appeared on Electronic Schematic Diagram.]]> https://electronicscheme.net/clap-on-off-switch/feed/ 0 2296 Mini Voice Operated Relay https://electronicscheme.net/mini-voice-operated-relay/?utm_source=rss&utm_medium=rss&utm_campaign=mini-voice-operated-relay https://electronicscheme.net/mini-voice-operated-relay/#comments Wed, 25 Aug 2010 23:32:57 +0000 http://electronicscheme.net/?p=506 This is the circuit diagram of a voice operated relay. It similar with sound activation switch circuit which will turn on and turn off (connect […]

The post Mini Voice Operated Relay first appeared on Electronic Schematic Diagram.]]> This is the circuit diagram of a voice operated relay. It similar with sound activation switch circuit which will turn on and turn off (connect and disconnect) the switch depending on the sound input. The output switch of this circuit is act by a relay.

voice operated relay

Components list:

R1, R7     : 1K
R2, R4, R8 : 10K
R3         : 2K2
R5         : 1M
R6         : 200K
R9         : 39K
D1, D4     : 1N4004
D2, D3     : 1N4148
C2, C5     : 2.2uF/16V mini ecap
 
C1    : 10uF/16V mini ecap
C4    : 100pF
C3    : 100nF
Q1    : BC548
IC1   : LM358 (of Hitachi HA17358)
8 pin IC socket
Relay : AX-SH-112L
LED 3mm
Electret microphone


This mini-VOX – voice operated relay – is based on a circuit published in Silicon Chip, 9/1994, p31.

The off delay time may be adjusted by varying R3 and R4. Reducing R3 will result in a longer release time.

You could change the release time constant (C2 & R5) to say 30 seconds and use the VOX as a light switch with this delay time before turning off. Increase C2 to say 10uF and R3 to 3M3.

To make the easy adjustment, you may use potensiometer or trimpot to varying the value of resistor. You will need additional place on the PCB but it will easier for you to make some adjustment.

The kit of this circuit available at kitsrus.com and electronickits.com, you may buy the circuit there.
Below document is the manual instruction of this mini voice operated relay circuit (download) :

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Mini Voice Operated Relay

1 file(s) 91.96 KB
Download Kit Manual

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