Sony C-37A Condenser Microphone
One of my prize pieces of equipment is a pair of Sony C-37A large capsule tube, condenser microphones. I bought these from the radio station at college because...
Bionic Ear
This circuit, connected to 32 Ohm impedance mini-earphones, can detect very remote sounds. Useful for theatre, cinema and lecture goers: every word will be clea...
LED Audio Power Indicator
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...
10 LEDs VU meter
The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs providing a logarithmic 3 dB/step analog display. LED curren...
Hot Springs Reverb
The Hot Springs tanks and circuit board should be mounted in a location that is free of ambient electro-magnetic fields. The input and output jacks are typicall...
Spring Reverb Unit
Spring reverb units are most commonly used in guitar amps, having been replaced by digital effects in most other areas. This cannot really be classed as a "real...
Bass Guitar Compressor
The project described here is one that you can just build and have working straight away (although it is entirely possible that you will want to experiment a bi...
Guitar Reverb Effect
The guitar input stage is a class A amplifier with adjustable bias. A 2N3906 PNP tranistor is used for a low noise design on this stage. The output of the pream...
Mini Metronome
Q1 & Q2 provide linear frequency operation of IC1 following P1 resistance variation.
Q3 was added in order to obtain a louder click, similar to clockwork ...
Guitar Tremolo Unit
The unit is simple to build, and does not need really low noise opamps, since they only act as a modulator oscillator. I used 1458 dual types in the prototype, ...
MIDI Drum Machine
Simplified Analog Input Schematic
This schematic represents the input circuitry for a single input.
This circuit is a track and hold. The idea is that t...
Guitar Effect Bypass Circuit
Observing my "Boss" pedals and how they were switched on and off I figured there must be more to it. It took me only about 4 hours to design and test this circu...
Guitar Reverb Pedal project
This circuit was inspired by a friend who wanted a reberb
for his portable guitar amplifier. I originally tried using NE5532
low noise op-amps for the buffer...
WAH & FUZZ Guitar circuits
These two projects , Wah and Fuzz, are the results of a modification to a Morley dual channel volume control pedal that one of my sons suggested I undertake as ...
Fuzz-box circuit
This circuit was designed to obtain a valve-like distorted sound from an electric guitar or other musical instrument.
For this purpose a very high gain, three-...
Guitar Vibrato circuit
The circuit of the unit is fairly simple, but is a bit irksome to set up. The reason is that obtaining matched FETs is not easy, so I had to make sure that the ...
IC 2 tones Siren
Double-tone Police sound
Single-tone old ambulance sound This circuit is intended for children fun, and can be installed on bicycles, battery powered cars and ...
IC 2 tones Siren
Double-tone Police sound
Single-tone old ambulance sound This circuit is intended for children fun, and can be installed on bicycles, battery powered cars and ...
AudioWave 2.0
With AudioWave 2.0 your soundcard becomes a comfortable LF-signal-generator, which produces signals from 1Hz to 20 kHz with a resolution of 1 Hz. Phase shift be...
AudioWave 2.0
With AudioWave 2.0 your soundcard becomes a comfortable LF-signal-generator, which produces signals from 1Hz to 20 kHz with a resolution of 1 Hz. Phase shift be...