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dub siren circuit – Circuit Schematic
dub siren circuit
The aim of this project was to have a bespoke object made using local manufacturing. At the time I was in dire need of a Dub Siren. I found a circuit diagram, w...
Simple Ring Modulator – Circuit Schematic
Simple Ring Modulator
This is a very simple ring modulator circuit which will allow you to make interesting analogue sound effects using two audio sources and some kind of amplifier ...
Kaoss Guitar Korg Kaoss Pad – Circuit Schematic
Kaoss Guitar Korg Kaoss Pad
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Converting an EV PL-76 or 1776 microphone to p48 powering – Circuit Schematic
Converting an EV PL-76 or 1776 microphone to p48 powering
The resistors could be 1/8w, The zener diode could be a 250mW part, or it could be a 1W part (1N number will be different). The electrolytic capacitor is plain ...
Phantom and T powering for condenser microphones – Circuit Schematic
Phantom and T powering for condenser microphones
An RF condenser design, it was powered by 12v, supplied to the microphone via the mike cable using a phantom circuit. This is the first known usage of a phantom...
Electronic VU Meter – Circuit Schematic
Electronic VU Meter
A portable CD player, radio, cassette player, a couple of microphones and PC sound card. I am feeding these into the inputs of an audio mixer the output of whic...
Arduino Audio DAC Options – Circuit Schematic
Arduino Audio DAC Options
DAC is short for Digital to Analog Converter. In this article we play around the code Michael Smith created for a PWM based DAC. I modified his code so that oth...
NAD C 520 – Circuit Schematic
NAD C 520
The LCD display on my NAD C520 compact disk player has become unreadable. The audio and CD deck are operating fine but operating the unit without a legible disp...
Bachmann Sound Tips – Circuit Schematic
Bachmann Sound Tips
The Bachmann Big Hauler locomotive has improved greatly over the last few years in appearance, reliability and noise level. However one thing that hasn`t improv...
STEREO TV DECODER – Circuit Schematic
STEREO TV DECODER
A block diagram of the stereo-TV decoder is shown in A. It shows the overall relationships be-tween the separate sections of the circuit; B through E show the d...
HEE HAW ELECTRONIC SIREN – Circuit Schematic
HEE HAW ELECTRONIC SIREN
The oscillator based on IC2 is responsible for producing the sound. Its output is connected to the base of TR1, which amplifies it to drive the speaker. Resisto...
STEREO LED VU METER – Circuit Schematic
STEREO LED VU METER
This circuit provides a cheap alternative to the LM3915 series LED displays. The meter relies on a square-wave oscillator built around two CMOS analog switches,...
ANALOG DELAY LINEECHO AND REVERB – Circuit Schematic
ANALOG DELAY LINEECHO AND REVERB
This circuit uses an SAD 512D (Reticon) chip, which is a 512-stage analog shift register. By varying the clock frequency between 5 and 50 kHz, delay time can be...
BIQUAD AUDIO FILTER – Circuit Schematic
BIQUAD AUDIO FILTER
The Biquad consists of two successive integration stages followed by an inverting stage. The entire group has a feedback loop from the front to the back consist...
EXTENDED RANGE VU METER BAR MODE – Circuit Schematic
EXTENDED RANGE VU METER BAR MODE
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IC DflIVE FOB VU METER – Circuit Schematic
IC DflIVE FOB VU METER
Used in high-quality stereo cassette deck operating from AC line or battery. Meter rectifier bridge is in feedback loop of opamp, to give highly linear AC/DC co...
MFB BANDPASS FILTER FOR MULTICHANNEL TONE DECODER – Circuit Schematic
MFB BANDPASS FILTER FOR MULTICHANNEL TONE DECODER
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AUDIO NOTCH FILTER FOR SHORTWAVE RECEIVERS – Circuit Schematic
AUDIO NOTCH FILTER FOR SHORTWAVE RECEIVERS
The notch filter can be added to just about any receiver to attenuate a single frequency by more Lhan 30 dB. This filter should be handy for reducing heterodyne...
ONE TRANSISTOR AUDIO MIXER – Circuit Schematic
ONE TRANSISTOR AUDIO MIXER
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FIVE INPUT VIDEO MIXER – Circuit Schematic
FIVE INPUT VIDEO MIXER
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