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Stereo Tone Control – Circuit Schematic
Stereo Tone Control
This simple tone control can be used in may audio applications. It can be added to amplifers, used as a stand alone control module, or even built into new and e...
Baxendall Tone Control – Circuit Schematic
Baxendall Tone Control
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Melody Generator using IC UM3561 – Circuit Schematic
Melody Generator using IC UM3561
This is a simple audio circuit, using UM3561, for generating melodies which can be used in toys and any other home appliances. A good project for young beginner...
Audio Preamplifiers Projects and Circuit – Circuit Schematic
Audio Preamplifiers Projects and Circuit
This Hi Fi stereo preamplifier circuit is built with TDA1054 IC from SGS. TDA1054 is a 16-pin DIL package and integrates 2 separate preamp circuits. It is a low...
Audio Filters Circuits Projects – Circuit Schematic
Audio Filters Circuits Projects
This audio noise filter circuit is a bandpass filter for audio frequency band. It filters unwanted signals that are lower or higher than the audio frequencies. ...
Simple Audio Mixer Circuit – Circuit Schematic
Simple Audio Mixer Circuit
The simple audio mixer circuit is built on common base principle, where input voltages are transformed in alternative currents wich are summed to form the.....
Musical Doorbell Circuit – Circuit Schematic
Musical Doorbell Circuit
This featured circuit is a musical doorbell. After the button S1 is pressed, a short melody is played. When the button is pressed many times in rapid succession...
Stereo Balance Indicator Circuit – Circuit Schematic
Stereo Balance Indicator Circuit
The simplest stereo balance meter circuit schematic available on the internet! When Left and Right signals are equal, no output is present from U1 and pin.....
Stereo TV Decoder Circuit – Circuit Schematic
Stereo TV Decoder Circuit
A simple stereo tv decoder circuit build with MC1310P. Transistor Q1 is an audio amplifier and U1 is used as a 31. 5KHz subcarrier which is similar to 38KHz FM ...
Intercom Circuit – Circuit Schematic
Intercom Circuit
In this intercom schematic, the 8 ohm speakers is used as microphone and listening speaker. The 10K potentiometer controls volume and the total gain can be.....
SPDIF Monitor Circuit – Circuit Schematic
SPDIF Monitor Circuit
The SPDIF monitor is one of the many applications possible with the digital audio interface receiver Type CS8412 from Crystal. Other applications described in e...
AVC Automatic Volume Control Circuit – Circuit Schematic
AVC Automatic Volume Control Circuit
AVC - The featured circuit controls a volume line automatically. It delivers an output voltage of approximately 4 volts peak to peak. This voltage remains.....
Audio Processor Circuit – Circuit Schematic
Audio Processor Circuit
This audio processor circuit features the SSM2045 IC which was developed specially for electronic music applications and the 741 opamp IC. The circuit is c.....
3 Band Audio Equalizer Circuit – Circuit Schematic
3 Band Audio Equalizer Circuit
This 3 band equalizer circuit is an active filter network for bass, mid and high audio ranges. It is designed around the LM833 opamp from National Semiconductor...
DX Audio Filter Circuit – Circuit Schematic
DX Audio Filter Circuit
Most universal radio receivers have a very wide bandwidth that is not particulary for radio amateurs. The better models with narrower bandwith are almost a.....
Subsonic Audio Filter Circuit – Circuit Schematic
Subsonic Audio Filter Circuit
A subsonic filter is mostly used in low frequency technology. Most often, the very low frequencies create distorsions in music recording or reproduction. T.....
Sound Controlled Toggle Switch – Circuit Schematic
Sound Controlled Toggle Switch
Here is a simple toggle switch that can be operated through sound signals such as whistle or clap. The output of the toggle remains either low or high unti.....
Audio Noise Filter Circuit – Circuit Schematic
Audio Noise Filter Circuit
This audio noise filter circuit is a bandpass filter for audio frequency band. It filters unwanted signals that are lower or higher than the audio frequenc.....
Electronic Organ Circuit – Circuit Schematic
Electronic Organ Circuit
This electronic organ circuit is very simple to construct and is basically an emitter-coupled oscillator composed of T2 and T3. An squarewave voltage can be sam...
Classroom Microphone System Circuit – Circuit Schematic
Classroom Microphone System Circuit
This audio amplifier circuit is useful in classrooms to reduce the strain of lecturing, if the surrounding environment is noisy. It uses the power amplifier IC ...