Electronics
Audio Amplifiers
Build Your Own Hi-Fi Audio Amplifiers
There’s nothing like hearing the amplifier you built play music for the first time! The LM3886 offers the highest audio quality, followed by the TDA2050, then the TDA2003. For portable or battery-powered projects, the LM386 is perfect. Check out the tutorials below and get started on an audio adventure!
Build a Great Sounding Audio Amplifier (with Bass Boost) from the LM386
Find out how to build a great sounding audio amplifier (with bass boost) from the LM386 IC, and learn what makes this amplifier sound better than the rest.
A Complete Guide to Design and Build a Hi-Fi LM3886 Amplifier
See how each part of the circuit works, how to calculate the best component values, and how to layout the PCB and wire your amplifier for great sound.
How to Hack a Headphone Jack
This tutorial will show you how to connect a 3.5 mm audio jack from an old pair of headphones to the audio input of your DIY audio projects.
How to Design and Build an Amplifier With the TDA2050
Follow along as I build a 25 Watt stereo amp with the TDA2050. I’ll show you how to change the gain, set the bandwidth, find the right heat sink size, and layout the PCB and wiring inside a chassis.
A Guide for Building TDA2003 Bridged and Stereo Amplifiers
A complete guide for building stereo and bridged audio amplifiers with the TDA2003, with tips for optimal PCB layout, grounding, and component selection.
Build a High Quality Audio Amplifier with the LM1875
Build an audio amplifier with excellent sound quality using the LM1875 audio amplifier chip. Step by step instructions and schematics included.
Ultimate Guide to Op-Amps – Part 1
Learn how operational amplifiers work, how to build an op-amp circuit, and some important parameters to consider when choosing an op-amp.
Transistor Amplifiers
Need a guide in designing your own transistor amplifier? Learn here the basics of gain, calculating gain, biasing, among others!
Ultimate Guide to Op-Amps – Part 3
Learn how to build non-linear op-amp circuits like a comparator, rectifier, peak detector, and constant volume amplifier. Schematics and detailed instructions included.
Ultimate Guide to Op-Amps – Part 2
Learn how to build eight different op-amp circuits, including an inverting and non-inverting amplifier, voltage follower, differential amplifier, integrator, differentiator, and summing amplifier.