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Notch Filter – Circuit Schematic
Notch Filter
At first glance this circuit looks fairly complex, but when broken down, can be divided into high pass and low pass filter sections followed by a summing amplif...
Loudness Control – Circuit Schematic
Loudness Control
When listening to music at low volume levels, bass and treble frequencies are attenuated more than mid frequencies. This loudness control alters the frequency r...
3 Band Graphic Equalizer – Circuit Schematic
3 Band Graphic Equalizer
Using a single op-amp this easy to make equalizer offers three ranges, low frequency, mid frequency, and high. With component values shown there is approximatel...
A 20 Input Audio Mixer for Multiple Receiver Setups – Circuit Schematic
A 20 Input Audio Mixer for Multiple Receiver Setups
Because of this audio mixer, I can compare the various receivers just by twiddling the gain controls. No switching required. Makes A/B comparisons a snap. (They...
A Master Control Unit for Receive Audio – Circuit Schematic
A Master Control Unit for Receive Audio
An audio mixer to which all the receiver audio outputs go, which is described here. The audio mixer`s output is amplified and drives a common speaker. So I hear...
SHURE Model M62 Simple Audio Level Controller Circuit Design – Circuit Schematic
SHURE Model M62 Simple Audio Level Controller Circuit Design
SHURE is an American corporation produces consumer and professional audio-electronics manufacturer of microphones, phonograph cartridges, discussion systems,.....
Basic Differential BiQuad Filter – Circuit Schematic
Basic Differential BiQuad Filter
A biquad filter is a type of linear filter that implements a transfer function that is the ratio of two quadratic functions. It is available in low pass, high.....
Two-Tone Siren Circuit Schematic Using One IC – Circuit Schematic
Two-Tone Siren Circuit Schematic Using One IC
Two-Tone Siren Circuit Schematic Using One IC Circuit This circuit is intended for children fun, and can be installed on bicycles, battery powered cars and moto...
Cuckoo Sound Generator Circuit Schematic – Circuit Schematic
Cuckoo Sound Generator Circuit Schematic
Cuckoo Sound Generator Circuit Schematic Circuit This circuit generates a two-tone effect very much alike the cuckoo song. It can be used for door-bells or othe...
USB Powered Stereo Computer Speaker – Circuit Schematic
USB Powered Stereo Computer Speaker
This is the circuit diagram of USB powered computer speaker, or it widely known as multimedia speakers for PCs. The circuit has single-chipbased design, low-vol...
Two Station Intercom based on LM386 – Circuit Schematic
Two Station Intercom based on LM386
This a two station intercom. It uses two wires to run between each intercom unit. Each is self contained with its own battery, speaker, microphone and amplifier...
PCM2706 USB Sound Card – Circuit Schematic
PCM2706 USB Sound Card
Here the USB Sound Card circuit based on PCM2706 which dedicated for USB audio. With USB controller module inside PCM2706, there is no more additional programmi...
Telephone ringtone generator circuit – Circuit Schematic
Telephone ringtone generator circuit
Join the forum discussion on this post This is a simple home telephone ringtone generator circuit which is built with applying only several electronic component...
Stereo car audio amplifier TDA1557Q TDA1553Q – Circuit Schematic
Stereo car audio amplifier TDA1557Q TDA1553Q
This stereo amplifier is for car purpouse and can deliver up to 2 x 22W using a single TDA1557Q or TDA1553Q from Philips. TDA1557Q TDA1553Q datasheet More audio...
Stereo VU Booster – Circuit Schematic
Stereo VU Booster
This is a stereo VU booster circuit diagram based on transistor FCS9014 which usually used for pre-amp and regulator circuit. This circuit should be connected t...
Simple Mixer – Circuit Schematic
Simple Mixer
Here the simple mixer with 4 input and 2 op-amps: A basic mixer suitable for mixing microphones or even effects outputs. The overall gain from input to output i...
Infrared headphones transmitter circuit – Circuit Schematic
Infrared headphones transmitter circuit
The transmitter offers a optical link (infrared) for headphones. Three infrared leds (ir) are polirised by T1 current, P1 is used to adjust the current level. C...
Electro-Harmonix Small Stone Phaser Guitar Effect – Circuit Schematic
Electro-Harmonix Small Stone Phaser Guitar Effect
This is the schematic diagram of Electro-Harmonix Small Stone Phaser guitar effect pedal. The Small Stone is somewhat special in applying Operational Transcondu...
Audio preamplifier circuits – Circuit Schematic
Audio preamplifier circuits
Electronics Circuits Reference Archive Audio preamplifier circuits There are thousands of pre-amplifier circuits. These are three which have interested me and a...
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 frequencies. ...