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Bass-treble tone control circuit circuit – Circuit Schematic
Bass-treble tone control circuit circuit
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 i...
Automatic Loudness Control circuit – Circuit Schematic
Automatic Loudness Control circuit
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 behavio...
6-Band Graphic Equalizer circuit – Circuit Schematic
6-Band Graphic Equalizer circuit
The EQ-2 it is a circuit of graphic equalizer 6 band of regulation. Each band is regulated from the potesometers RV1-6, that are, for better optical indicate of...
5 Band Graphic Equalizer circuit – Circuit Schematic
5 Band Graphic Equalizer circuit
Other one unit of graphic EQ. five bands. The basic difference with the other circuits is, that I use instead of IC, transistor and the power supply, go up in +...
Audio Auto Fade circuit – Circuit Schematic
Audio Auto Fade circuit
This circuit is design, in order to is heard the voice above the music. Useful for DJ, for small radio stations, for statements above the music, in shops etc. A...
Stereo Preamplifier with adjustment tone circuit – Circuit Schematic
Stereo Preamplifier with adjustment tone circuit
Many times we needed to use a simple circuit of preamplifier, with few components and facility of made. This circuit use a opamp. the Motorola, TCA5550, that co...
mini audio analyzer – Circuit Schematic
mini audio analyzer
This analyst is, a sensitive instrument, in the frequency changes and width of a acoustic signal. Thus the brightness of LED that turns on each moment of is pro...
Three-Level Audio Power Indicator circuit – Circuit Schematic
Three-Level Audio Power Indicator circuit
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 to a...
Speaker Microphone Circuit – Circuit Schematic
Speaker Microphone Circuit
This circuits allows you to use a cheap loudspeaker as a microphone. Sound waves reaching the speaker cone cause fluctuations in the voice coil. The voice coil ...
Three Channel Audio Mixer Circuit – Circuit Schematic
Three Channel Audio Mixer Circuit
Although the modular Portable Mixer design available on these web pages has become a hit for many amateurs, some correspondents required a much simpler device, ...
FET Audio Mixer circuit – Circuit Schematic
FET Audio Mixer circuit
As many or as few channels as are required can be added to the mixer. Do this by just duplicating the input "sections" which are clearly shown on the schematic....
DC-Coupled Audio Amplifier circuit – Circuit Schematic
DC-Coupled Audio Amplifier circuit
Designs for audio amplifiers with DC coupling to the load are not often encountered these days, even though they offer definite advantages.....
A Low Power Wireless Audio Power Amplifier circuit – Circuit Schematic
A Low Power Wireless Audio Power Amplifier circuit
Using this low-cost project one can reproduce audio from TV without disturbing others. It does not use any wire connection between TV and Loud Speaker. In place...
Low Power Op-Amp - Audio Amp (50 milliwatt) circuit – Circuit Schematic
Low Power Op-Amp - Audio Amp (50 milliwatt) circuit
The example below illustrates using an op-amp as an audio amplifier for a simple intercom. A small 8 ohm speaker is used as a microphone which is coupled to the...
Bass-treble tone control circuit – Circuit Schematic
Bass-treble tone control circuit
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 i...
FET Audio Mixer – Circuit Schematic
FET Audio Mixer
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 ...
Electronic Stethoscope – Circuit Schematic
Electronic Stethoscope
U1a operates as a low-noise microphone preamp. Its gain is only about 3. 9 because the high output impedance of the drain of the FET inside the electret microph...
Portable Mixer – Circuit Schematic
Portable Mixer
A low noise circuit equipped with a variable voltage-gain (10 - 100) pre-set, primarily intended as high quality microphone input, also suitable for low-level l...
Precision Metronome and Pitch generator – Circuit Schematic
Precision Metronome and Pitch generator
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One-IC two-tones Siren – Circuit Schematic
One-IC two-tones Siren
This circuit is intended for children fun, and is suitable to be installed on bicycles, battery powered cars and motorcycles, but also in models and other games...