Author: Circuit Basics

How to Design and Build an Amplifier With the TDA2050

PCBs for this project are available here.  Note: This guide will also work with the TDA2030 as long as you keep the supply voltage below ±18 V. The TDA2050 is a great sounding chip amplifier with lots of power. In this tutorial, I’ll walk you through the amplifier design process as I build a 25 Watt stereo amplifier with the TDA2050. First, I’ll show you how to calculate the voltage and current requirements of your power supply, and show you how find a properly sized heat sink. Then, I’ll show you how to find the right values for all of the components in the circuit. I’ll also...

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A Complete Guide to Design and Build a Hi-Fi LM3886 Amplifier

Note: Editable PCB files are available for this project here. The LM3886 is one of the most highly regarded audio chip amplifiers in the DIY community. The reason for its popularity is due to its very low distortion, minimal external components, and low cost. With the right layout and component selection, you can build an excellent sounding Hi-Fi audio amplifier that will rival high-end amps retailing for several thousand dollars or more. In this tutorial, I’ll go step by step through the amplifier design process as I build a 40 Watt stereo amplifier using the LM3886. I’ll explain what each part of the circuit does, and show you how...

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A Guide for Building TDA2003 Bridged and Stereo Amplifiers

Note: Stereo and bridged amplifier PCBs are available for this project. The TDA2003 is a low cost audio chip amplifier that can put out some really nice sounds. It’s typically used for car audio amplifiers, but it also works great as a bedroom amp or anywhere else you need good audio without tons of power. In this tutorial, I’ll show you how to build two different amplifiers with the TDA2003. The first is a stereo amplifier that will output 7 Watts per channel. The second is a bridged amplifier that can output 14 Watts per channel. If you don’t already have it, I recommend downloading and...

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