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6 channel audio mixer – Circuit Schematic
6 channel audio mixer
This is 6 Channel Audio Mixer circuit. 3 channel for microphone input and the others 3 channel for audio input like CD player, computer, or television. There wi...
10 band graphic equalizer – Circuit Schematic
10 band graphic equalizer
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low cost mic mixer – Circuit Schematic
low cost mic mixer
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doorphone intercom – Circuit Schematic
doorphone intercom
An 8 ohm speaker is used both as a microphone and also an output device. The BC109C stage amplifies in common base mode, giving good voltage gain, whilst provid...
ecm mic preamplifier – Circuit Schematic
ecm mic preamplifier
Microphone amplifier schematics that may be used with either Electret Condenser Microphone (ECM) inserts or dynamic inserts, made with discrete components : Mak...
speak spell – Circuit Schematic
speak spell
A "talking" computer is not necessarily expensive - not if you mate one of the low-cost computers (Sinclair ZX-80, ZX-81, or Timex 1000) with Texas Instruments ...
ic speech – Circuit Schematic
ic speech
For some ten years Texas Instruments have been developing solid state speech technology with the result that speech can now be produced which faithfully preserv...
10 band equalizer – Circuit Schematic
10 band equalizer
This circuit uses a single chip, IC TL074 for achieving a 5-band graphic equalizer for use in Hi-fi audio systems. The 5-band graphic equalizer is true for radi...
fet audio mixer circuit – Circuit Schematic
fet audio mixer circuit
This is a simple project circuit for mixes two or more channels into one channel (eg. stereo into mono). The circuit can mix as many or as few channels as you l...
phone ringtone generator circuit – Circuit Schematic
phone ringtone generator circuit
At the same time, pulses obtainable from pin 1 will be of 1. 25 Hz and 20 Hz at pin 14. The three output pins of IC1 are connected to base terminals of transist...
audio graphic equalizer circuit – Circuit Schematic
audio graphic equalizer circuit
This is a design circuit for audio graphic equalizers, that are very common as commercial products but circuits for them are very rarely published. This circuit...
3 band equalizer – Circuit Schematic
3 band equalizer
This is a simple 3 band graphic equalizer circuit that`s built by a single op amp IC LF351 IC and few passive components. The component values of this circuit a...
car radio audio amplifier using tda2003 – Circuit Schematic
car radio audio amplifier using tda2003
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4 channel portable audio mixer 18 – Circuit Schematic
4 channel portable audio mixer 18
The target of this project was the design of a small portable mixer supplied by a 9V PP3 battery, keeping high quality performance. The mixer is formed assembli...
tl072 car subwoofer filter circuit – Circuit Schematic
tl072 car subwoofer filter circuit
Here is the circuit diagram of an easy subwoofer filter that can be operated from a 12V DC supply. Such a circuit is incredibly helpful in automobile subwoofer ...
tl062 subwoofer low pass filter – Circuit Schematic
tl062 subwoofer low pass filter
Many low pass filter circuits for subwoofer seem to be given And this is also just Another one. The circuit given here is Depending about the opamp TL062 from o...
usb sound card with pcm 2702 – Circuit Schematic
usb sound card with pcm 2702
Designing and building a USB sound card longer a head ache got the PCM 2702 integrated circuit from Texas Instruments. The PCM2702 is an integrated bit digital ...
usb audio interface circuit based dac – Circuit Schematic
usb audio interface circuit based dac
This is high quality Preamplifier circuit with built-in USB DAC for my power amplifier Leachamp. Schematics is from datasheet of PCM2902. Circuit includes DAC a...
op amp 6 line audio mixer circuit – Circuit Schematic
op amp 6 line audio mixer circuit
The mic inputs are amplified about 100 times or 40dB, the total gain of the mixer including the summing amplifier is 46dB. The mic input is designed for microph...
cdmp3 cd with cdroom circuit diagram – Circuit Schematic
cdmp3 cd with cdroom circuit diagram
Most of the CDROMS available have an Audio-Out Output to either plug in the headphones or connect it to an amplifier. This circuit enables one to use the CDROM ...