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_Buck_Boost_Converter-RXig0YIif Previous video: https://youtu.be/fe_t5PEudgA Buck Converter video: https://youtu.be/m8rK9gU30v4 Boost Converter video: https://youtu.be/QnUhjnbZ0T8 ATtiny Programming Shield: https://youtu.be/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)