2017-06-04

[public] 1.10M views, 22.6K likes, dislikes audio only

GreatScott!

Amplifier circuit file on EasyEDA: https://easyeda.com/GreatScott/ClassDAudioAmp-8577705d8e0442faacfe601503588491

Support me for more videos: https://www.patreon.com/GreatScott

Previous video: /youtube/video/X0ihx9_1iFY

Class AB Audio Amp video: /youtube/video/oGTXczCV30A

Facebook: https://www.facebook.com/greatscottlab

Twitter: https://twitter.com/GreatScottLab

More project information (schematic pictures,....) on Instructables: https://www.instructables.com/id/DIY-Class-D-Audio-Amplifier

Thanks to EasyEDA for sponsoring this video.

Free circuit design tool with 200,000 users: https://easyeda.com

$2 for10pcs 2-layer 10x10cm PCB prototype here: https://easyeda.com/order

Wide selection in-stock components: https://lcsc.com

Parts list (Incomplete, see Instructables for Ebay and Amazon.de, affiliate links):

Aliexpress:

1x 3.5mm Audio Jack: https://s.click.aliexpress.com/e/_dYyosJz

1x 10kΩ Potentiometer: https://s.click.aliexpress.com/e/_dX83GAF

1x LM393 Comparator: https://s.click.aliexpress.com/e/_d7ObgpD

1x TLC555 Timer: https://s.click.aliexpress.com/e/_dTrUY9D

1x 74HC04 Inverter: https://s.click.aliexpress.com/e/_d8c7LDl

1x IR2113 MOSFET Driver: https://s.click.aliexpress.com/e/_d7SJq6b

2x IRLZ44N MOSFET: https://s.click.aliexpress.com/e/_dWhSrDl

1x 7805 Voltage Regulator: https://s.click.aliexpress.com/e/_dXSrfiP

1x 7812 Voltage Regulator: https://s.click.aliexpress.com/e/_d8OcXHl

2x PCB Terminal: https://s.click.aliexpress.com/e/_dYbstfZ

3x 47µF, 1x 22µF Capacitor: https://s.click.aliexpress.com/e/_d7dOwRz

7x 220nF Capacitor: https://s.click.aliexpress.com/e/_dU4FEsB

3x UF4007 Diode: https://s.click.aliexpress.com/e/_dYR45Bh

2x 10kΩ, 2x 10Ω, 1x 2kΩ Resistor: https://s.click.aliexpress.com/e/_dTPpXjt

2x 33µH Inductor: https://s.click.aliexpress.com/e/_d6A4mKL

In this project I will show you why a class AB amplifier is pretty inefficient and how a class D amplifier on the other hand improves this efficiency. At the end I will show you how we can apply the theory of operation of a class D amp to a couple of common components in order to create our own DIY class D audio amp.

Music:

2011 Lookalike by Bartlebeats

Killing Time, Kevin MacLeod (incompetech.com)