Electronic circuits & Projects » Kits

Electronic dog whistle

ElectroSchematics.com — Thu, 21 Jan 2010 13:47:00 +0000

Need electronic dog whistle? It is widely known that dogs can hear sounds with frequencies higher than the humans cant hear. Sound frequencies higher than 20 kHz can be hardly detected by humans but animals are very sensitive to it. Basing this fact, an electronic dog whistle can be constructed and used to call dogs [...]

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Electronic dog whistle

Electronic Dog Caller Circuit Schematic With this electronic dog caller circuit you can call your...
Electronic dog repellent, dog chaser schematic Electronic DOG Chaser Repeller The electronic dog repeller circuit produces...
Top 10 Electronic Circuits March 2010 It’s time for the Top 10 Electronic Circuits for March...

Digital Volume Control

ElectroSchematics.com — Mon, 18 Jan 2010 16:17:46 +0000

The heart of this digital volume controller DVC circuit is IC2 4067, 16-channel analog multiplexer. Because the 1kΩ has been connected between every input and output, the multiplexer can act like a potentiometer. The total resistance is 15kΩ . You can use different values for the resistor to obtain a different characteristic. The current consumption [...]

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Digital Volume Control

Electronic Potentiometer circuit This is a digitally controllable electronic potentiometer. The heart of...
Diode digital thermometer circuit This digital thermometer circuit diagram uses a common 1N4148 diode...
Touch volume control Touch controls are not only used to switch devices on...

Audio compander schematic

ElectroSchematics.com — Fri, 15 Jan 2010 16:09:21 +0000

This audio compander circuit schematic is equiped with NE575 produced by Signetics, it is working with a 3 – 7V battery and has a current consumption of 3.5mA at 3V and 5mA at 7V. The companding process ( input compression, output as expander) is improving the signal/noise ratio on a communication line. NE575 contains 2 [...]

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Audio compander schematic

Audio duplex communication link schematic You need two of this circuits to create a duplex...
Audio limiter circuit schematic This audio limiter circuit is easy to build, works with...
Automatic Gain Control – AGC Automatic Gain Control or AGC is a circuit design which...

Sound Generator – Jet engine aircraft

ElectroSchematics.com — Mon, 04 Jan 2010 15:05:05 +0000

This is a simple sound generator to produce jet engine aircraft sounds and it will run on any battery voltage between 3v and 40v. The circuit will produce 4 sounds : low speed sound of aircraft, high speed sound of aircraft, missile and machine gun. They are activated by connecting pins 12, 13, 14 or [...]

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Sound Generator – Jet engine aircraft

Voice, sound recorder circuit schematic This voice or sound recorder built with ISD1012, ISD1016 and...
Anxiety Symptoms Generator Do you want to feel the anxiety symptoms or get...
UM3561 Siren Generator Design UM3561 is an excellent ROM IC that can generate Multi...

Full duplex audio line

ElectroSchematics.com — Wed, 30 Dec 2009 14:31:18 +0000

This full duplex audio line circuit enables two audio signals in opposing directions to flow simultaneously through a common twisted pair line. And it does that without complicated communication technology. This technique called full duplex is not really new. It is common in telephone technology. However, the telephone uses a carrier signal. This circuit on [...]

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Full duplex audio line

Audio duplex communication link schematic You need two of this circuits to create a duplex...
Universal line amplifier A line amplifier is a circuit which is good to...
Mini audio compressor schematic This mini audio compressor circuit use only one active component...