Signal Chain Basics Audio metering enjoying the VU
Audio metering is present in almost any equipment that plays or records audio from cell phones displaying bar graphs of audio output levels, to home stereos wit...
Audio Circuit(BassMidTreble)
I don`t know if this is a good design or not.Circle Op-amp are 2nd order low/high pass filter. Low pass filter range is 20-250Hz High pass filter.....
Simple Stepped Volume Control
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Tech Gear Multi-Voice Changer
The Voice Changer has two different inputs, the microphone and the switches. The Voice Changer then outputs a signal to an OpAmp to amplify the signal being sen...
Human Voice A1 Loud Clear English Talking Watch 2 Alarms Rooster Crow 12 24
This particular model speaks in a pleasant female voice at the touch of a button, and if you need to be reminded of something during the day, it has an alarm fu...
TA8184P Schematic for Dual Channel Voltage/tone Control Ic
Tho TA8184P TA8184F is DC controlled dual volume, balance, Tone (8ass and treble) IC. it is suitable for car stereo, radio cassette, music center, TV multiplex ...
TA2042F Schematic for Dual Pre Amplifier With A Music Search For Auto Reverse Car Stereo
The TA2042F is dual pre amplifier with a music interval detection circuit for auto reverse car stereo. This IC contains dual amplifier, forward/reverse control ...
A Studio Preamplifier
The first was interested in a flexible preamp for use with a high-end acoustic guitar with piezo-electric bridge pickup, and the second wanted a preamp for use ...
Fred Nachbaurs Theremax modifications
The purpose of this page is neither to give a comprehensive review of this popular theremin design, nor to be an introduction to the fascinating and quirky worl...
theremin bamttech
This page steps through each section of my implementation of BAMTRAT. Many of the component values shown were determined experimentally, to suit my own tastes a...
Simple sound trigger for cameras and flashes
This acticle describes how to build a simple yet effective sound trigger for cameras or flashes. The circuit allows to experiment with high-speed photography.....
Loudness control
First you will have to use a opamp like ne5532, than calculate the frequency you want on each block(on block for flat, one for bass and one for high), don`t for...
msp430 audio prototype
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FM Wireless Microphone
A very simple, inexpensive and interesting project which provides lot of fun to a home experimenter or hobbyist. This simple transmitter can transmit speech ove...
Dual Input-Combining Stereo Line Amplifier
This circuit takes two separate line-level stereo (L & R) signals and combines them into one stereo (L & R) output, thus avoiding the need to switch between two...
Rain Sound Effects Generator
This rain sound effects generator circuit simulates the rain noise and may be used in the field of electronic music and radio shows. As a noise source we use a ...
Guitar Control
IC1A op-amp is wired as an inverting amplifier, having its gain set by a three ways switch inserting different value resistors in parallel to R4. This input sta...
Audio Amplifier Output Relay Delay
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 ...
Twin-T RC Notch Filter
The two T-notch filter can be used to block unwanted frequencies or if placed in an op amp as a bandpass filter. the notch frequency occurs where the capacitive...
Stereo Decoder
In FM stereo transmission left and right channels are algebraically encoded into sum (left + right) and difference (left-right) signals. This is done in order t...