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There are many different audio power amplifier ICs to choose from, but designing an audio power amplifier using an operational amplifier (op-amp) and bipolar transistors is quite advantageous. Compared to audio ICs, power transistors are easy to replace in case...
The circuit described here is of a dual audio signal tracer. An audio signal tracer is a simple device used to troubleshoot for audio signals in radio and other electronic circuitry. The device is a battery-powered stereo amplifier with two...
Presented here is an Arduino based audio meter that uses a liquid crystal display (LCD). A VU meter or standard volume indicator (SVI) is a device that displays a representation of signal level in audio equipment. In this project,...
Audio noise can be annoying, especially if you are trying to listen to a very weak radio station. Peaks of unwanted background noise completely swamp the broadcast signal, making it unintelligible. The audio noise limiter circuit presented here overcomes...
These days most audio systems come with remote controllers. However, no such facility is provided for normal audio amplifiers. Such audio controllers are not available even in kit form. This article presents an infrared (IR) remote controlled digital audio...
These days there a lot of audio power amplifiers in integrated circuits (ICs). But it is still interesting to produce audio power amplifiers with operational amplifiers (OAs) and with output power bipolar transistors. Some of the reasons for that...
Listening to music on a self-made system is great. Good-quality audio amplifier circuits can be constructed with minimum components. Described here is an LME49710 based audio amplifier. Author’s prototype is shown in Fig. 1. LME49710 based audio amplifier circuit As shown...
Switching on a television set in the evenings is a habit for most. Surfing through the channels we may find a telecast we like and go on to watch. While there are no issues on most days, you might...