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3 channel audio mixer – Circuit Schematic
3 channel audio mixer
This audio mixer circuit uses an LM3900 IC but is not a profesional audio dj mixer. The IC houses four integrated Norton amplifiers. The advantage of using the ...
Dynamic Mic Preamplifier Circuit – Circuit Schematic
Dynamic Mic Preamplifier Circuit
This mic preamp uses the low noise IC uA739. The circuit is an example of how a good preamplifier can be designed for dynamic microphones. The IC houses two ide...
Electronic Bicycle Horn Circuit – Circuit Schematic
Electronic Bicycle Horn Circuit
This simple electronic bicycle horn circuit uses only one gate of a 4093 quad 2-input NAND Schmitt trigger, U1, conected in a simple, low frequency, square.....
UM3561 Siren Generator Design – Circuit Schematic
UM3561 Siren Generator Design
UM3561 is an excellent ROM IC that can generate Multi siren tones simulating Police siren, Ambulance siren, Fire brigade siren and Machine gun sound. This 8 pin...
AVC Automatic Volume Control Circuit – Circuit Schematic
AVC Automatic Volume Control Circuit
The function of this automatic volume control circuit is to amplify signals without distorting its dynamic compression. The amplitude differences in the signal ...
FET Audio Mixer Circuit – Circuit Schematic
FET Audio Mixer Circuit
This FET audio mixer is an example of FET`s versatility. FETs are originally designed for high frequency applications but they can be used for audio frequencies...
LM833 3 Band Audio Equalizer – Circuit Schematic
LM833 3 Band Audio Equalizer
The main component of this 3 band graphic equalizer is LM833 produced by National Semiconductor. LM833 has a very low noise, and a band / amplifier of 15MH.....
VOX Circuit – Circuit Schematic
VOX Circuit
VOX is a switch ordered by voice, often used at microphones instead of the classic switch button. The vox described here may be connected to almost any type of ...
Subwoofer Filter Circuit – Circuit Schematic
Subwoofer Filter Circuit
This subwoofer active filter circuit is a 24 dB octave filter with a Bessel character and cutoff frequency of 200 Hz. So, if you are interested in experimenting...
Talk Over Circuit – Circuit Schematic
Talk Over Circuit
A very usefull talk over circuit which you can use in your radio stations, club or anywhere you want to speak over music without any movement of potentiome.....
One Transistor Audio Mixer – Circuit Schematic
One Transistor Audio Mixer
The simplest one transistor audio mixer circuit diagram on the net. It has only one transistor and can support as many audio signal as you can afford. BC10.....
Audio Compressor Circuit with SSM2165 – Circuit Schematic
Audio Compressor Circuit with SSM2165
A very simple audio compressor built with SSM2165 IC. There is no much explication about this compressor circuit schematic, just pay attention at capacitor.....
Stereo Encoder Circuit – Circuit Schematic
Stereo Encoder Circuit
This simple stereo encoder circuit schematic is build with 2 IC MMC4066E and MMC4047 and one transistor BC547B. On IC1 2 and 3 pins is the audio output whi.....
LM2896 Car Audio Amplifier Circuit – Circuit Schematic
LM2896 Car Audio Amplifier Circuit
This car stereo booster uses an LM2896 IC which has two integrated amplifiers. It can be powered with voltages up to 15 volts. The power output is 2. 5 watts pe...
Single Transistor Audio Mixer Circuit – Circuit Schematic
Single Transistor Audio Mixer Circuit
This single transistor audio mixer is used in an amplifier circuit design with base driven transistor and with its emitter being current controlled, most o.....
TDA1022 Audio Reverberator Circuit – Circuit Schematic
TDA1022 Audio Reverberator Circuit
The first reverberator we present is based on TDA1022, the most used BBD. Reverberator adjustements for proper functionality Before we connect the power su.....
Audio Wattmeter Circuit with LM3915 – Circuit Schematic
Audio Wattmeter Circuit with LM3915
This sound wattmeter uses a row of colored LEDs as a scale to show the relative power output of your amplifier in watts. It is easy to be inserted into the spea...
Low Noise Microphone Preamplifier Circuit – Circuit Schematic
Low Noise Microphone Preamplifier Circuit
The microphone preamplifier circuit design presented in this schematic use SSM2015 produced by Precision Monolithics Inc. (PMI) which offers a high amplificatio...
Simple VOX Circuit – Circuit Schematic
Simple VOX Circuit
VOX is a voice controlled switch, used often for microphones replacing the classic switching button. The actuating threshold is set thru the volume potenti.....
Electronic Doorbell Circuit – Circuit Schematic
Electronic Doorbell Circuit
This simple and cost-effective ding dong electronic doorbell circuit is based on IC 8021-2. The IC has an in-built circuitry to produce ding dong sound each tim...