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

Project file on the free design tool: https://easyeda.com/GreatScott/ATtiny...

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Buck Converter video:    • DIY Buck Converter || How to step dow...  
Boost Converter video:    • DIY Boost Converter || How to step up...  
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Project information (schematic, code, ....) on Instructables:
http://www.instructables.com/id/DIY-B...

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/_d6S...
1x MCP602: https://s.click.aliexpress.com/e/_dZI...
1x 7805 5V regulator: https://s.click.aliexpress.com/e/_d8k...
1x IRLZ44N: https://s.click.aliexpress.com/e/_dWh...
1x 100kΩ Potentiometer: https://s.click.aliexpress.com/e/_dX8...
1x 0.03mH Inductor: https://s.click.aliexpress.com/e/_dYc...
1x 1N5819 Schottky Diode: https://s.click.aliexpress.com/e/_dYR...
2x Screw Terminals: https://s.click.aliexpress.com/e/_dYb...
2x 100nF Capacitor: https://s.click.aliexpress.com/e/_dU4...
1x 100µF, 1x 220µF Capacitor: https://s.click.aliexpress.com/e/_d7d...
2x 10kΩ, 2x 5.1kΩ, 2x 20kΩ, 1x10Ω Resistor: https://s.click.aliexpress.com/e/_dTP...
Ebay:
1x ATtiny85: http://rover.ebay.com/rover/1/711-532...
1x MCP602: http://rover.ebay.com/rover/1/711-532...
1x 7805 5V regulator: http://rover.ebay.com/rover/1/711-532...
1x IRLZ44N: http://rover.ebay.com/rover/1/711-532...
1x 100kΩ Potentiometer: http://rover.ebay.com/rover/1/711-532...
1x 0.03mH Inductor: http://rover.ebay.com/rover/1/711-532...
1x 1N5819 Schottky Diode: http://rover.ebay.com/rover/1/711-532...
2x Screw Terminals: http://rover.ebay.com/rover/1/711-532...
2x 100nF Capacitor: http://rover.ebay.com/rover/1/711-532...
1x 100µF, 1x 220µF Capacitor: http://rover.ebay.com/rover/1/711-532...
2x 10kΩ, 2x 5.1kΩ, 2x 20kΩ, 1x10Ω Resistor: http://rover.ebay.com/rover/1/711-532...

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)