Advertisement
DAC and Headphone Amplifier – Circuit Schematic
DAC and Headphone Amplifier
The idea behind the portable DAC is to get better sound than from the line out or headphone out of portable CD player, a pc sound card or other digital audio so...
Equalization Circuit – Circuit Schematic
Equalization Circuit
2 versions of the equalization circuit, the first having 6 db less insertion loss than the other. However, some may not be able to find a .68 microfarad capacit...
Bass Tuning circuit – Circuit Schematic
Bass Tuning circuit
A circuit that tailors the low end of particular items such as the bass drum and bass guitar to be used for individual tracks during mixdown, not across the ent...
Multimedia speakers – Circuit Schematic
Multimedia speakers
The Dutch magazine Audio & Techniek once published an article about one-way loudspeakers that were based on Audax units 1. Although speakers using just a single...
Active Noise-Canceling Headphones – Circuit Schematic
Active Noise-Canceling Headphones
The electronics consist of three op-amp circuits; each built around one half of an NE5532 dual op-amp. Each circuit uses that op-amp in a different configurati...
Audio Controlled Christmas Lights – Circuit Schematic
Audio Controlled Christmas Lights
The basic Idea was to have Christmas lights flash with the music. In my design I use an ordinary amplified computer speaker, a diode bridge, and a ‘CRYDOM’ ...
Sola Sound ToneBender – Circuit Schematic
Sola Sound ToneBender
This is probably one of the most legendary fuzz pedals that has ever existed, and for good reason too! This thing can produce some completely saturated fuzz tha...
Audio Jammer Noise generator – Circuit Schematic
Audio Jammer Noise generator
Audio Jammer Noise generator for detector audio circuit...
20Hz audio bandpass filter – Circuit Schematic
20Hz audio bandpass filter
This audio bandpass filter is useful for amplification and filtering of weak AM TV video carriers. For example, a DFM (digital frequency audio multimeter) may h...
Compressor-Limiter-Clipper for FM transmitters – Circuit Schematic
Compressor-Limiter-Clipper for FM transmitters
Audio signals as music or speech have big dynamic ranges. There are silent and loud sections. These audio signals aren't too good for a transmitter, which requi...
10 LED VU meter with LM3915 – Circuit Schematic
10 LED VU meter with LM3915
Supply voltage: 12 V. Supply current: 10 mA in stand-by, max. 80 mA. Input voltage: min. 20 mV rms. Indication range: 30 dB. LED currents: 7 mA. Ref. voltage of...
Audio Volume Control with Resistor Switches – Circuit Schematic
Audio Volume Control with Resistor Switches
The traditional potentiometer is implemented with an electrical contact that slides over a resistive layer. An example of a well-known audio-grade potmeter is t...
Audio frequency generator – Circuit Schematic
Audio frequency generator
My generator can produce sine- and squarewaves with frequencies between 1 Hz and 100 kHz and amplitudes ranging from zero to 1.55 Veff in 600 Ohms. Sinewave dis...
USB sound card with PCM2702 – Circuit Schematic
USB sound card with PCM2702
If you use great IC PCM2702 from BURR BROWN / Texas Instruments you can create a fully functional USB sound card. This sound card can be powered from USB port a...
TONE CONTROL AND SUBWOOFER OUT – Circuit Schematic
TONE CONTROL AND SUBWOOFER OUT
PT2350 is a tone control subwoofer cross-over low pass filter chip utilizing CMOS Technology. It features a tone control range of + 10dB (50Hz, 4 KHz) and subwo...
Electrostatic Loudspeakers project – Circuit Schematic
Electrostatic Loudspeakers project
Building ESLs involves the use of tools and materials that if handled improperly can be hazardous. Please make sure you know how to use these things before you ...
audio white noise generator – Circuit Schematic
audio white noise generator
This is a circuit that generates white noise, rolled-off to drive earphones or a small speaker. White noise creates is a "rushing" sound, which sounds something...
9 LED VU meter – Circuit Schematic
9 LED VU meter
This simple and easy to make circuit is a 5 LED VU Meter based on LB1409 IC from SANYO, which will indicates the volume level of the audio signal it senses. SUP...
Stethoscope with TL072 – Circuit Schematic
Stethoscope with TL072
U1a operates as a low-noise microphone preamp. Its gain is only about 3.9 because the high output impedance of the drain of the FET inside the electret micropho...
Stethoscope with TL072 – Circuit Schematic
Stethoscope with TL072
U1a operates as a low-noise microphone preamp. Its gain is only about 3.9 because the high output impedance of the drain of the FET inside the electret micropho...