audio-circuits

This can also be called a poor man`s hearing aid because it can be constructed from some low cost components although its performance is not comparable to that ...

Filter

Many low pass filter circuits for subwoofer are given here and this can be simply another one. The circuit given here using the opamp TL062 from ST Micro electr...

Portable Phone Preamplifier

This assemblage was advised for amateurs owning an old accumulating of vinyl recordings and absent to accept it digitally remastered into a claimed computer. Or...

Headphone Audio Amplifier with Balance Control

Both halves of the circuit are identical. Both inputs have a dc path to ground via the input 47k control which ought to be a dual log type potentiometer. The ba...

Amplifier Circuit Output Relay Delay Audio

This is a simple circuit which I built to one of my audio amplifier projects to control the speaker output relay. The purpose of this circuit is to control the ...

Schematic MP3 Car Audio Power AmplifierCircuits

Here, it is a diagram of an Car audio active loudspeaker. The LF353 of, National Semiconductor. For Best Results using NE5532, is going to split audio signal in...

VU meter circuit for LM3915 PCB

This circuit uses just one IC and a very few number of external components. It displays the audio level in terms of 10 LEDs. The input voltage can vary from 12V...

LED VU Meter by IC LM3914 PCB

This be LED VU Meter by IC LM3914 circuit show with LED convenient for the stereo or sound all signal. This easy circuit again because use IC LM3914 show get 10...

Automatic Muting Circuit For Audio Systems PCB

Here`s a circuit diagram of automatic muting for audio systems using IC LB1403. The signal from pre-amplifier such as LA3160, LA3161 or HA1032 is connected to t...

Touch Sensitive Musical Bell With Timer PCB

This circuit diagram is a UM66 based touch sensitive musical bell. The circuit is built around CMOS IC CD4011 and popular melody generator IC UM66. The circuit ...

Audio Level Meter Circuit LM3915

This meter circuit uses just one IC and a very few number of external components. It displays the audio level in terms of 10 LEDs. The input voltage can vary fr...

Microphone Circuit-PC Sound Card

This microphone circuit was submitted by Lazar Pancic from Yugoslavia. The sound card for a PC generally has a microphone input, speaker output and sometimes li...

High-End Audio Modular Preamplifier

This circuit isn`t easy to built but you will get a great audio quality from this circuit. This circuit will give u a high quality preamplifier, capable to driv...

Sound Effects Alarm Generator

This schematic in very simple and easy to made. The IC produces all the sound effects, the output at Pin 3 being amplified by the transistor. A 64 ohm loudspeak...

Sound Level Meter with LM3915

Here`s a nifty sound level meter is a perfect one chip replacement for the standard analog meters. It is completely solid state and will never wear out. The who...

Auto Fade Implementation on Audio Signals Project PCB

TL072 a low noise JFET input operational amplifier with features such as common-mode input voltage range, high slew rate, operation without latch up, compensate...

Audio Level Meter

This is audio meter that can be monitored using a small panel meter with this circuit built from discrete components. The audio level meter circuit has a flat f...

2G—22W Stereo Car Audio Amplifier schematic diagram

This is a schematic diagram of stereo audio amplifier for your car. The circuit is powered by a single IC TDA1553 with some external components, this IC will ha...

Audio Voice-Over Circuit PCB

This is a circuit where a microphone and preamp circuit (voice circuit) have priority over any other audio signal. You can think of this as a one way intercom, ...

6 Input Mixer PCB

The mixer circuit above has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic...