Comments on: USB charger bad https://www.epanorama.net/blog/2025/10/01/usb-charger-bad/ All about electronics and circuit design Tue, 14 Apr 2026 09:28:54 +0000 hourly 1 http://wordpress.org/?v=3.9.14 By: Tomi Engdahl https://www.epanorama.net/blog/2025/10/01/usb-charger-bad/comment-page-1/#comment-1866232 Mon, 01 Dec 2025 11:31:04 +0000 https://www.epanorama.net/blog/?p=198341#comment-1866232 What does rage-bait mean? Rage-bait (also spelled as ragebait and rage bait) is content (usually, but not always, found online) that tries to provoke anger or outrage, as a means of gaining attention or making money. The word is also used as a verb (“to make intentionally provocative or inflammatory statements”).

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2025/10/01/usb-charger-bad/comment-page-1/#comment-1864974 Sat, 08 Nov 2025 07:46:00 +0000 https://www.epanorama.net/blog/?p=198341#comment-1864974 Voisi olla terveellistä, että kaikki rakentelijat tietäisivät, miten li-ion-akku ladataan.
Sille on syynsä, miksi jokaisessa lataavassa laitteessa on älykäs latauspiiri, joka huolehtii siitä, ettei akku räjähdä.

https://www.akkutohtori.fi/litium-akun-lataaminen/#:~:text=Laturin%20tulee%20olla%20tarkoitettu%20litium,ett%C3%A4%20k%C3%A4yt%C3%B6ss%C3%A4si%20on%20oikea%20laturi.

“Litium[-]akkua ladataan ensin vakiovirralla, kunnes akun jännite saavuttaa Maksimijännite arvon. Tämän jälkeen laturi lataa akkua vakiojännitteellä, kunnes akun latausvirta on pudonnut noin 10% alkuperäisestä vakiovirrasta.”

]]> By: Tomi Engdahl https://www.epanorama.net/blog/2025/10/01/usb-charger-bad/comment-page-1/#comment-1863211 Thu, 09 Oct 2025 20:24:48 +0000 https://www.epanorama.net/blog/?p=198341#comment-1863211 Congratulations for makes Facebook a worse place by posting a non-working AI crap circuit diagram

]]> By: Shanaya https://www.epanorama.net/blog/2025/10/01/usb-charger-bad/comment-page-1/#comment-1863191 Thu, 09 Oct 2025 12:22:52 +0000 https://www.epanorama.net/blog/?p=198341#comment-1863191 This article rightly condemns a poorly designed circuit for Li-ion battery charging from USB power, highlighting the severe safety and performance issues like lack of current limiting and potential overcharging (fire/explosion risk) due to inadequate voltage regulation. The conclusion HCTRA System Map is to use a dedicated, safe charging solution like a TP4056 module.

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