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STICKY Megathread: Random observations about electronic devices

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Observations Some CD players play audio on both headphones and speakers when the headphone plug is only partially inserted.

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“What will happen to a stun gun if you ZAP A 220 VOLT socket with it. What a stun gun is capable of” – KREOSAN English

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372

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Moist DVD-R detected as DVD-RAM by S182!

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The smallest Discman ever made - was smaller than a CD (partially exposed) - TechMoan

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What Is Brown Out Reset in Microcontrollers? How to Prevent False Power-Downs - Technical Articles

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Tech tips Mobile phone overheating from fast charging? Put it on a portable USB fan.

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324

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Tech tips Shorted USB data lanes signal a mobile phone the availability of indefinite charging speeds if manually supplied with a voltage.

381

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Observations Optical drives read some damaged CDs better with underclocked laser, at higher rotation speeds and after heating up?

400

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Observations Observation: The audio inputs (white and red) of old CRT televisions can be used without needing a video (yellow) signal, while newer TVs usually require a video signal for the audio inputs to be activated at all.

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Experiences If some features and controls are only accessible via the remote control - Something I disliked about CD/DVD players since childhood.

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Experiences 2012: A Samsung DVD-Video/Audio player had a feature that memorizes damaged files and mark them as unplayable. (Kept in memory even after disc ejection.)

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Observations Some optical drives refuse to speed up again after encountering damaged parts of a disc once. (And other strange speed limits.)

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Power Supply Design: Switch-Mode vs. Linear

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From dB to S-point : learn to play with power units

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Observations Some CD players from different vendors, when stumbling upon damage on audio CDs, accelerate disc rotation when the laser lost track, before trying to seek the last position again.

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Overburning CD-RW experience: Disc speeds up towards the end when played back using old audio CD player!

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692

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Google Pixel 5 price just leaked — and it’s very bad news for the Galaxy S20

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Why Power Adapters Are So HUGE - TechQuick

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213

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Why European power outlets have the best design (essay)

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Experiments Extreme Speed Record Player - PhotonicInduction

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Breaking In a Power Supply (Overloading Electronics) - DanTheAwesomeMan

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Tested: The Xiaomi Redmi Note 8 Pro supports both Qualcomm's Quick Charging and MediaTek PumpExpress fast charging standards.

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The evolution of fast charging – summaized. ( Quick Charge & Pump Express )

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I Built 1 Bit of RAM From Transistors

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