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Simple 150 Watt Amplifier Circuit using Transistors

In this post we learn how to make a simple 150 watt power amplifier circuit using a typical OCL design which ensures cheap layout and use of minimum components, with high reliability. Introduction Referring to the figure a perfectly symmetrical OCL based amplifier can be seen , using discrete components suitable for all electronic enthusiasts … Read moreSimple 150 Watt Amplifier Circuit using Transistors

Audio Record/Playback Circuit using IC ISD1820

The post  explains the functioning of the  IC ISD1820 which is a single chip audio message record/playback chip featuring a 20 second audio recording and storing facility in its internal memory and playing it back through a small 8 ohm speaker whenever required. Introduction The IC ISD1820 is a device which features a single chip … Read moreAudio Record/Playback Circuit using IC ISD1820

Mp3 Player Using DF Player – Full Design Details

In this post we are going to construct an Mp3 player using arduino and DFPlayer. The proposed article has two Mp3 player designs, one with push button control and another one with IR remote control. We will also take a look at DFPlayer (Mp3 player module) and its specifications. By Arduino Guru  We all love … Read moreMp3 Player Using DF Player – Full Design Details

4 Channel DJ Audio Mixer Circuit for Discotheque Applications

This is a universal 4 channel DJ audio mixer project that may be customized and upgraded to 5 channel or even 10 channel level as desired by the user. 5 Stage DJ Mixer Five stages are employed within the layout; DJ mixer stage; Mono headphone amplifier stage; Balanced-microphone preamplifier stage; Stereo VU circuit stage, and … Read more4 Channel DJ Audio Mixer Circuit for Discotheque Applications

Balanced Microphone Preamplifier Circuit

In this post we learn about a simple Hi-Fi balanced microphone preamplifier circuit and also evaluate the calculations, specifications of the design through formulas. What is a Balanced Preamplifier A “balanced” amplifier or differential amplifier possesses not one but two distinct inputs and only the difference amongst these inputs is actually amplified. To elucidate just … Read moreBalanced Microphone Preamplifier Circuit

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