In this video, I will discuss in detail the selection of the most important Raspberry Pi accessory, the power supply, including the reasons and background.
Why does the official version of the power supply output 5.36V at no load? From where does the value of 4.63V that causes the low voltage warning come? What is CPU throttling, which occurs when the voltage drops below 4.63V?
If you can solve these questions, you will understand why the Raspberry Pi 4 needs an official power supply.
Doctor BMH
Wataru Nishida, MD🩺, PhD🎓
00:00 Introduction
01:02 Voltage Measurement
02:36 Voltage Drop
03:58 Low Voltage Warning
08:13 Power Management IC (MxL7704)
11:56 CPU Throttling Experiment
20:03 Kernel Build Experiment
24:00 Closing
📚 REFERENCES (Links mentioned in the video)
https://blogs.baremetalhack.com/raspi-power-supply
👀 SEE ALSO
💾 antBASIC GitHub https://github.com/baremetalhack/antBASIC
🌐 BMH homepage https://baremetalhack.com/en.html
🐣 Doctor BMH’s Twitter account https://twitter.com/DoctorBMH
👏 SPECIAL THANKS TO
・BMH icons and characters: Dai Watanabe (わたなべ大) https://twitter.com/kakideko
・Illustrations in the slides: I-RA-SU-TO-YA (いらすとや) https://www.irasutoya.com
・Epilogue music: “Absolutely Carefree” (Serj Anto), licensed by PremiumBeat
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