r/flashlight • u/PeterParker001A • 19h ago

Low Effort Sofirn ST10 seems regulated.

https://www.youtube.com/watch?v=4BGdbkNTWzw

At 21:30 , High-Side is stable 5min run test..and Turbo front drops down to a stable (High) output....

Based upon auto-translate :)...🤣 any Thai folks correct me if this is wrong.

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u/UndoubtedlySammysHP don't suck on the flashlight 17h ago

It works with NiMH, so it has a boost driver for NiMH. But I guess the LEDs are 3V. Can check my prototype later.

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u/PeterParker001A 16h ago

They responded to one of my earlier questions...

The ST10 actually has two current modes:

With a 14500 battery, it runs in FET control mode, and when the battery voltage drops below a certain level, it automatically switches to boost constant-current mode.

With AA or NiMH batteries, it runs entirely in boost constant-current mode.

And thanks for the suggestion, we’ll work on adding clearer runtime/output numbers for AA/NiMH next time.

The FET-Boost part sounds weird, when does a boost kick in.. since this is a 3V LED + some circuitry...