Audio Power Meter
This simple circuit indicates the amount of power that goes to a loudspeaker. The dual-color LED shows green at an applied power level of about 1 watt. At 1. 5 ...
Audio Clipping Indicator
Detects clipping in preamp stages, mixers, amplifiers etc., Single LED display 9V Battery supply unit This circuit was intended to be used as a separate.....
A Low Power Wireless Audio Power Amplifier
Battery-Powered portable unit, Suitable for all type Televisions Using this low-cost project one can reproduce audio from TV without disturbing others. It.....
4 Channel Portable Audio Mixer
High-quality modular design, 9V Battery powered Very low current drawing The target of this project was the design of a small portable mixer supplied by.....
3khz Low Pass Filter and Audio Amplifier
This circuit uses a switched capacitor filter IC from National Semiconductor to filter signals with frequencies higher than the 3KHz needed for voice audi.....
1W BTL Audio Amplifier
The TDA8581 from Philips Semiconductors is a 1-watt Bridge Tied Load (BTL) audio power amplifier capable of delivering 1 watt output power into an 8 ohm l.....
DIY Audio Function Generator Part 1
Most of my Blog posts involve short 3-4 hour projects/hacks that I just build up for learning and fun. I thought it was time to develop something a bit mo.....
Three ECC83-Based Tube Phono Preamplifier Circuits
The three circuits were based on the vacuum tube ECC83 designed to produce phono preamplifiers in compliance with the RIAA standards. Recording Industry A.....
Stereo Mixer for Microphone with 2 Channels
The circuit was designed to provide 2 channels on a stereo mixer that will be used for microphones while having a crossfader operation. NE5532 an intern.....
Soft-Action Mute Switch
This simple circuit is a line-level audio signal muting switch based on a soft-action power on/off process. When the S1 switch is closed, R4, C1 and Q4 JF.....
modular audio mixer with multiple input channels
The circuit was designed to create an audio mixer that can be assembled in modules while providing 6 or more input channels. Audio Mixer a device used t.....
Middle Frequency Equalizer with Parametric Feature
Equalizer a passive or an active electronic element or circuits (like tone control) used for the reason of altering or flattening the frequency response charact...
Hi-Fi Phono Preamplifier with RIAA Specification
The circuit was designed according to the RIAA implementation of Hi-Fi phono preamplifier for the purpose of reproducing an audio from a moving magnet car.....
Graphic Equalizer Circuit for 10 Frequency Bands
The circuit was designed to create ten different frequency bands to be handled by a single graphic equalizer to produce and maintain a predetermined area.....
Equalizer Circuit Operating on Three Bands
The circuit was designed to illustrate the use of tone control circuit by which the audio signals are adjusted before being carried out to any output devi.....
Class A-Designed Symmetrical Audio Preamplifier
The circuit was designed to produce a preamplifier with symmetrical audio input while the output operates in Class A type. Preamplifier (pre-amp) a devi.....
3 Band Graphic Equalizer Circuit
The circuit illustrates the use of 3 frequencies to produce a graphic equalizer that will be used for acoustic signals. Equalizer a passive or an active.....
xx Band Audio Equaliser
A 20 Band EQ for my 900Watt MOSFET Power Amplifier. The Output Level would drop by the Ammount of resistors, so for 2 Equal Resistors, I should amplify it by a ...
DSP Mixed Signal Solutions for Multi Channel Audio
The drawback of this architecture is that it disregards the differences between the various channels. First, the subwoofer channel has a reduced bandwidth and i...
Making sounds with analogue electronics Subtractive synthesis
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