Vacuum Tube Circuits
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Tone Control Circuits
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Noise Generators
When you need to test an audio circuit with broadband noise, this circuit works great. It uses just three inexpensive C-MOS ICs that generate a series of output...
Audio Mixers Circuits
The mixer circuit below has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic...
Boss SD-1 Super OverDrive guitar pedal schematic diagram
The Boss SD-1 Super OverDrive is a pedal with a simple design, using only one dual operational amplifier (uPC4558C) and 6 transistors, with an asymmetric overdr...
Pearl CH-02 Chorus Schematic Diagram
The Pearl CH-02 Chorus is a long discontinued pedal with a superb sound. It has 4 knobs: DEPTH, SPEED, TONE and MIX BALANCE. The TONE knob only adjusts the tone...
Boss GE-7 Equalizer guitar pedal schematic diagram
The Boss GE-7 Equalizer pedal adjusts the harmonic contents of an instrument in 7 separate bands ranging from 100Hz to 6. 4kHz, with a boost/cut 15dB per band. ...
Boss DM-2 Delay Guitar Pedal Schematic Diagram
There are at least 3 different versions of this circuit. The first DM-2 version was using the MN3005 BBD and the MN3101 Clock Driver IC (PCB marking: ET5214-510...
Boss DD-2 Digital Delay Guitar Pedal Schematic Diagram
The DD-2 is one of the best digital delay pedals and actually sounds very analog! The pedal was sold from 1983 and it did officially go out of sale 1986 but it ...
Boss MT-2 Metal Zone distortion pedal schematic diagram
The MT-2 Metal Zone ™ is one the most popular guitar pedals, providing over-the-top, insane distortion tones with huge mids and lows and an ultra-saturated so...
Sound card microphone
Most sound card microphone inputs require a minimum signal level of at least 10 millivolts, but some older 8-bit cards need as much as 100 millivolts. The typic...
Surf Simulator Circuit
Do you long for a beach holiday on a tropical island, but you don t have the necessary wherewithal? We ve got just the answer: build the i-TRIXX surf simulator,...
Cuckoo Sound Generator Circuit
This circuit generates a two-tone effect very much alike the cuckoo song. It can be used for door-bells or other purposes thanks to a built-in audio amplifier a...
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 motorcycles, but also on models and various games and toys...
Sound Effects Generator 2 circuit
All sound effects are generated internally by the HT2884 IC. Power is a 3 Volt battery, but the IC will work with any voltage between 2. 5 and 5 Volts. Switch S...
TV Muter Circuit
Many households are still graced by tube-type television sets. If you want to connect one of these large tellies to your stereo system to improve the sound qual...
IR Music Transmitter and Reciever circuit
Using this circuit, audio musical notes can be generated and heard up to a distance of 10 metres. The circuit can be divided into two parts: IR music transmitte...
ir music transmitter and receiver
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Paraphase Tone Controller circuit
This unique property makes the ˜paraphase configuration of interest if only treble or bass needs to be adjusted - it is not possible to adjust both at the same...
Automatic Loudness Control Circuit
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