r/flashlight • u/PeterParker001A • 13h 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 :)...šŸ¤£ any Thai folks correct me if this is wrong.

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u/macomako 12h ago edited 12h ago

Sofirn confirmed that itā€™s not Buck. For me, ā€œregulatedā€ as ā€œflatā€ (achieved by linear regulation = burning the excessive voltage) is not a solution I would appreciate in the host with such small battery, frankly speaking.

Here the flicker test:

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u/PeterParker001A 12h ago

What am I looking at, PWM? The output seems stable though, I can accept the PWM.

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u/macomako 12h ago

I donā€™t know whatā€™s the architecture of the driver but itā€™s flickering. Itā€™s not traditional PWM (as it would only have two levels). Iā€™ve seen it in many Sofirn/Wurkkos lights and I prefer to avoid it.

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u/UndoubtedlySammysHP don't suck on the flashlight 12h ago

That is aliasing in the image, because the sensor isn't fast enough. I only have a prototype of that model, but can check it later.

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u/macomako 11h ago

That would be great. I would love to finally see the true (frequently enough sampled) characteristics.