HACKED!: Adding a Current Limit Feature to a Buck/Boost Converter

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Previous video: https://youtu.be/Fj0XuYiE7HU
DIY Buck/Boost Converter: https://youtu.be/ZiD_X-uo_TQ
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Twitter: https://twitter.com/GreatScottLab
More project information (schematic, pictures,....) on Instructables: https://www.instructables.com/id/Adding-a-Current-Limit-Feature-to-a-BuckBoost-Conv/

Parts list (incomplete, see Instructables for more, affiliate links):
Aliexpress:
1x Buck/Boost Converter: https://s.click.aliexpress.com/e/_dTevK0K
1x LF33 Voltage Regulator: https://s.click.aliexpress.com/e/_dT0fKCw
1x 10nF Capacitor: https://s.click.aliexpress.com/e/_dU4FEsB
1x 10µF Capacitor: https://s.click.aliexpress.com/e/_d7dOwRz
1x 0.1Ω Current shunt: https://s.click.aliexpress.com/e/_dSyQdMA
2x 3.3kΩ, 2x 100kΩ Resistor: https://s.click.aliexpress.com/e/_dTPpXjt
1x MCP602 OpAmp: https://s.click.aliexpress.com/e/_dTvJRGw
1x 10kΩ Trimmer: https://s.click.aliexpress.com/e/_dTFyPv5
1x UF4007 Diode: https://s.click.aliexpress.com/e/_dYR45Bh
1x Voltage/Current Meter: https://s.click.aliexpress.com/e/_d8lymHM

Ebay:
1x Buck/Boost Converter: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=263026689519&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
1x LF33 Voltage Regulator: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=311572996786&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
1x 10nF Capacitor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=181982214939&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
1x 10µF Capacitor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=401206644592&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
1x 0.1Ω Current shunt: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=182383981237&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
2x 3.3kΩ, 2x 100kΩ Resistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=401036186511&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
1x MCP602 OpAmp: 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 10kΩ Trimmer: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=182551169452&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
1x UF4007 Diode: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=291549913009&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg
1x Voltage/Current Meter: http://rover.ebay.com/rover/1/711-53200-19255-0/1?icep_ff3=2&pub=5575101368&toolid=10001&campid=5337582279&customid=&icep_item=282652383468&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg

Music:
2011 Lookalike by Bartlebeats
Ecstatic Wave, Jens Kiilstofte
https://machinimasound.com/music

In this episode of HACKED! I will have a closer look at a common buck/boost converter and create a small, additional circuit that adds a current limit feature to it. With it, the buck/boost converter can be used just like a variable lab bench power supply.

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