Audio electronic circuits
Audio amplifier circuit diagrams, but also preamp, equalizer, mixer and other electrical circuit diagrams.
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10W Mini Audio Amplifier with very small count of electronic components based around TDA2003 circuit. You can use this powerful amplifier in any small audio... [read]
A 15 watt amplifier made using discrete components. Interesting and not so difficult do build.... [read]
20W Bridge Audio Amplifier kit, based on the TDA2005 IC, a class B dual audio amplifier, specifically designed for car radio applications etc.... [read]
This 3 channel 15 LED spectrum analyzer is the perfect addition to any audio amp project. It produces fantastic displays on three LED bars that can be individually... [read]
This project is a 3 or more lines mixer. For more than 3 inputs you can repeat the input parts... [read]
Here is a little audio amplifier similar to what you might find in a small transistor radio. The input stage is biased so that the supply voltage is divided... [read]
This complete high quality, low noise 5-BAND GRAPHIC EQUALIZER circuit is based around Monolithic Linear integrated circuit LA3600 manufactured by SANYO. This... [read]
This is a handy, easy to build general purpose 50 watt amp. The amp has an input for a radio, TV, stereo or other line level device.... [read]
A simple mixer with 3 line inputs and 3 mic inputs using commonly available parts. The mic inputs are amplified about 100 times or by 40dB, the total gain... [read]
Bass, Treble, Harmonic modifier and Brightness controls. Output power: 40W on 8 Ohm and 60W on 4 Ohm loads... [read]
The 60 Watt linear amplifier is simple all solid state circuit using power mosfet IRF840.... [read]
Here is the schematic for an 8 watt audio amp. This amp can be used as a simple booster, the heart of a more complicated amplifier or used as a guitar amp.... [read]
This very simple circuit just uses a couple of resistors, a capacitor and the easily available 555 timer IC.... [read]
This circuit, connected with 32 Ohms impedance mini-earphones, can detect very remote sounds. Useful for theatre, cinema and lecture goers: every word will... [read]
Tendency of catering: 15V Force of expense: 4,2Wrms in the 4W Minimal signal of entry: 94mVp-p with preamplifier, 0,65Vp-p without the preamplifier.... [read]
This circuit turns-off an amplifier or any other device when a low level audio signal fed to its input is absent for 15 minutes at least.... [read]
It displays the audio level in terms of 10 LEDs. The input voltage can vary from 12V to 20V, but suggested voltage is 12V.... [read]
This preamplifier has a low output impedance, and is designed to drive long cables, allowing you to listen to a remote music source without having to buy expensive... [read]
The controls may also be adjusted for use as a band stop (notch) filter or band pass filter.... [read]
Used to detect sound in some area. This circuit has only two transistors and several passive components... [read]
5 LED VU Meter kit is based on LB1409 IC from SANYO, which will indicates the volume level of the audio signal it senses... [read]
In order to obtain a good audio reproduction at different listening levels, a different tone-controls setting should be necessary to suit the well known behaviour... [read]
The LM1036 is a DC controlled tone (bass/treble), volume and balance circuit for stereo applications in car radio, TV and audio systems. An additional control... [read]
This circuit produces the sound of a beeper like the one in pagers which produces a "beep-beep" sound. Basically the circuit consists of a 555 timer oscillator... [read]
This circuit produces the famous Big Ben sound. It produces the "ding dong" sound when switched ON.... [read]
A Class A // Class AB amplifier rated 100 Watts when driving a 4 ohm loudspeaker... [read]
This circuit could be used for replacing your manual volume control in a stereo amplifier.... [read]
A low noise pre-amplifier suitable for amplifying dynamic microphones with 200 to 600 ohm output impedance... [read]
A microphone amplifier that may be used with either Electret Condenser Microphone (ECM) inserts or dynamic inserts, made with discrete components... [read]
Two low voltage, low power zeners are used to control electronically the level of an audio signal. The attenuation range is from 6 to 58dB for an input current... [read]
This simple circuit mixes two or more channels into one channel (eg. stereo into mono). The circuit can mix as many or as few channels as you like and consumes... [read]
The aim of this design is to reproduce a Combo amplifier of the type very common in the sixties and the seventies of the past century.... [read]
An amplifier to drive low to medium impedance headphones built using discrete components... [read]
This circuit corrects the problem somewhat and allows a larger voltage swing and probably more output power, but I don't know how much without doing a lot... [read]
Infrared cordless Headphone Amplifier circuit diagram.... [read]
Using this low-cost project one can reproduce audio from TV without disturbing others. It does not use any wire connection between TV and headphones. In place... [read]
This is a great intercom circuit that can be used in many ways. It uses 22V to operate and maybe it will work at a lower voltage ... [read]
Audio wireless transmitter and receiver. It uses laser beam from laser pointer to transmit audio signal. Not so applicable, but very interesting and easy circuit... [read]
The circuit comprises a 3-stage resistor-capacitor coupled amplifier. When ring button S2 is pressed, the amplifier circuit formed around transistors T1 and... [read]
The circuit is a microphone amplifier for use with low impedance (~200 ohm) microphones. ... [read]
This tiny circuit comprising of a single 3 terminal IC UM66 can be built small enough to be placed inside a greeting card and operated off a single 3V flat... [read]
Mini-box 2W Amplifier Designed for self-powered 8, 4 & 2 Ohm loudspeakers. Contains Bass-boost switch.... [read]
This is a very simple, low cost, Hi-Fi quality power amplifier. You can build it 5 ways, like it is shown in the table (from 20 W to 80 W RMS)... [read]
Audio preamplifier designed for dynamic or electret microphones. Uses several components which are easy to find. It has a 23.5k ohm input impedance. It can... [read]
This circuit has minimal number of components and it's easy to build. It measures peak level of a sound signal. It uses ... [read]
In recent years, following CD's introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old... [read]
It is designed for portable cassette players and radios. You can also use it as your PC Audio Amplifier. A few external components required to build this circuit.... [read]
Can be directly connected to CD players, tuners and tape recorders.... [read]
This circuit is mainly intended to provide common home stereo amplifiers with a microphone input.... [read]
The target of this project was the design of a small portable mixer supplied by a 9V PP3 battery, keeping high quality performance.... [read]
Precision Audio Millivoltmeter. Uses audio for measuring voltage.... [read]
This is a four channel amplifier ideally suited for use with quadraphonic equipment such as a Sound Blaster Live card. There is no volume control,audio levels... [read]
This nifty sound level meter is a perfect one chip replacement for the standard analog meters. It is completely solid state and will never wear out. The whole... [read]
This circuit takes an ordinary loudspeaker and allows it to be used in reverse, as a microphone. ... [read]
The add-on circuit presented here is useful for stereo systems. This circuit has provision for connecting stereo outputs from four different sources/channels... [read]
This preamplifier was designed to cope with CD players, tuners, tape recorders etc., providing a gain of 4, in order to drive less sensitive power amplifiers.... [read]
Stereo tape head preamplifier using LA3161 circuit diagram... [read]
The circuit is simple, yet is capable of excellent performance. I designed it specifically for use as an amplifier for the digital sound card in my computer.... [read]
This circuit is intended to indicate the power output level of any audio amplifier. It is simple, portable, and displays three power levels that can be set... [read]
Most of the CDROMS available have an Audio-Out Output to either plug in the headphones or connect it to an amplifier.... [read]
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Alarms, control, timers
- Audio
- Tools and measuring
- Power supplies
- Light and LED
- Radio
- Telephone related
- Miscellaneous
- For your car
- PC related
Top 15 circuits