DIY Buck/Boost Converter (Flyback) || How to step up/down DC voltage efficiently

2016-10-09

[public] 655K views, 15.3K likes, dislikes audio only

Project file on the free design tool: https://easyeda.com/GreatScott/ATtiny_Buck_Boost_Converter-RXig0YIif

Previous video: /youtube/video/fe_t5PEudgA

Buck Converter video: /youtube/video/m8rK9gU30v4

Boost Converter video: /youtube/video/QnUhjnbZ0T8

ATtiny Programming Shield: /youtube/video/9LjfkjwMqXI

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

Twitter: https://twitter.com/GreatScottLab

Support me for more videos: https://www.patreon.com/GreatScott?ty=h

Project information (schematic, code, ....) on Instructables:

http://www.instructables.com/id/DIY-BuckBoost-Converter-Flyback

Thanks to EasyEDA for sponsoring this video.

Check out their free circuit design tool here: https://easyeda.com

Parts list (Amazon.de on Instructables, affiliate links):

Aliexpress:

1x ATtiny85: https://s.click.aliexpress.com/e/_d6SPsKP

1x MCP602: https://s.click.aliexpress.com/e/_dZIAwSP

1x 7805 5V regulator: https://s.click.aliexpress.com/e/_d8kqX6x

1x IRLZ44N: https://s.click.aliexpress.com/e/_dWhSrDl

1x 100kΩ Potentiometer: https://s.click.aliexpress.com/e/_dX83GAF

1x 0.03mH Inductor: https://s.click.aliexpress.com/e/_dYct48b

1x 1N5819 Schottky Diode: https://s.click.aliexpress.com/e/_dYR45Bh

2x Screw Terminals: https://s.click.aliexpress.com/e/_dYbstfZ

2x 100nF Capacitor: https://s.click.aliexpress.com/e/_dU4FEsB

1x 100µF, 1x 220µF Capacitor: https://s.click.aliexpress.com/e/_d7dOwRz

2x 10kΩ, 2x 5.1kΩ, 2x 20kΩ, 1x10Ω Resistor: https://s.click.aliexpress.com/e/_dTPpXjt

Ebay:

1x ATtiny85: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=201250561025&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x MCP602: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=181846803759&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x 7805 5V regulator: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=281678007991&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x IRLZ44N: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=261074291323&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x 100kΩ Potentiometer: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=191984937391&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x 0.03mH Inductor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=400985381578&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x 1N5819 Schottky Diode: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=130703663173&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

2x Screw Terminals: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=181846953484&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

2x 100nF Capacitor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=222272460844&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

1x 100µF, 1x 220µF Capacitor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=182051237506&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

2x 10kΩ, 2x 5.1kΩ, 2x 20kΩ, 1x10Ω Resistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=271598211084&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

In this project video I will show you how a buck/boost converter (flyback) works and how you can easily build one that can step up and step down DC voltage efficiently.

Music:

2011 Lookalike by Bartlebeats

Killing Time, Kevin MacLeod (incompetech.com)