Audio Tone Control Using The TLC074 Operational Amplifier

This application report describes the design and function of a stereo high-fidelity tone control using a single TLC074 quad operational amplifier. A rail-to-rail operational amplifier is used to pr...

Stereo Sound Controller IC BA3853BFS

The BA3853BFS is a dual-channel electronic volume controller built around a low-noise, low-distortion VCA. It is suited for car-audio applications, and has performance that rivals mechanical-type v...

4-Channel Multi Mode Audio Amplifier

Sometimes we need configurable multichannel amplifiers for experiments or for use in offices or schools. Here is a multi mode audio amplifier circuit based on

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Pump Up the Volume

Dynamic range is something of a challenge for rig makers now.  Even with great AF dynamic range, the capability of DSP can push the noise floor down to the point where it's hard to hear the&nb...

Adding APF and Variable Bandwidth to the Sub Rx

Bringing the main RX DSP flexibility to the sub RX using modern active filter technology
Based on the testin...

How to Build a Microphone Amplifier Circuit

In this project, we will go over how to connect a microphone to an amplifier circuit so that we can amplify the sounds recorded by the microphone.

This way, if the sig...

PC-Based Candle Igniter

Here’s a PC-based lighting system that lets you light up a candle using matchsticks by just pressing the ‘Enter’ key on the PC’s keyboard. It is especially useful when celeb...

IR-Controlled Water Supply

This circuit can be used in homes or small restaurants for any type of water supply unit, such as toilet flush or washbasin tap...

Crystal AM Transmitter

Here is the circuit of a medium-power AM transmitter that delivers 100-150 mW of radio frequency (RF) power...

Simple Key-Operated Gate Locking System

This simple key-operated gate locking system allows only those persons who know the preset code to open the gate. The code is to be entered from the keypad within the preset time to operate the mot...

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