Uploaded May 2023 | Updated September 2026, 2 weeks ago

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Previous video: youtu.be/OWEU1eR3Tyw
AliExpress video: youtu.be/NjNOGm3sCOQ
Capacitor video: youtu.be/2v8zBj7_sxg
Inductor video: youtu.be/hYOtx_2hYTU
Filter video: youtu.be/1wzUqVFyQ7o

You can get the mentioned products and capacitors here: (affiliate links)
Power Supply: https://s.click.aliexpress.com/e/_DmzJv9f
5V UPS: https://s.click.aliexpress.com/e/_DcQteFr
Mini Boost Converter: https://s.click.aliexpress.com/e/_DCwYdwh
Capacitors: mouser.de/ProductDetail/Samsung-Electro-Mechanics/CL32A226KPJNNNE?qs=sGAEpiMZZMukHu%252BjC5l7YYSaqHT4BB0iHXlLVxBE%2FL8%3D
mouser.de/ProductDetail/Samsung-Electro-Mechanics/CL31B105KAHNFNE?qs=h6Piwd%2FnvzliA%252BKuhKdPjw%3D%3D

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Websites which were shown during the video:
prodigit.com/show/how-to-test-noise-from-the-output-of-power-supply.htm
meanwelldirect.co.uk/glossary/what-is-output-noise
cdn.hackaday.io/files/1829407826904960/Xysemi_XR2981.pdf
ti.com/lit/an/snva871/snva871.pdf?ts=1682880670833&ref_url=https%253A%252F%252Fwww.google.com%252F
ti.com/seclit/ml/slup384/slup384.pdf

Thanks to Keysight for sponsoring this video.

0:00 The Problem of my AliExpress Products
1:16 Intro
2:04 Why is Noise/Ripple Bad?
3:39 How to Measure Noise Correctly
4:32 5V UPS Noise Problem
5:46 Solution 1: Post Regulation
7:51 Solution 2: Component Improvement
8:39 Capacitor Replacement
9:55 Other Component Problems
10:49 Mini Boost Converter Fix