Sofirn SP40 Headlamp

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Nachtfeuerzeug
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I bought a couple of these AP-15 headbands from Battery Juction for a better price than the Nitecore model. 

Recent/ongoing Mods:

https://imgur.com/a/8qUyZbL

https://imgur.com/a/EHq0i

 

                                

 

contactcr
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I hear the perfect light for checking on babies is a gchart piggybacked MCU on a SP40. Hope all is well

gchart
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contactcr wrote:
I hear the perfect light for checking on babies is a gchart piggybacked MCU on a SP40. Hope all is well

I wouldn’t doubt it Wink

I’m currently putting two of my babies (well, toddlers) to sleep as we speak. Their nightlight? A custom Sofirn SC31. At first I just did an MCU swap. Then I went all out and designed a driver that uses a watch crystal to keep (extremely accurate) time. 10 hours on, 14 off. Ramping UI, e-switch LEDs as battery warning, etc. And with the MCU running at a super low clock rate, standby drain is like just a few uA.

Now that you mention it, I was going to disassemble my SP40 to peak at the PCB/MCU but my buddy still has it. Hmmm… I’m going to need that back!

Board is not public, it has a mistake I haven’t corrected… just did an air wire

contactcr
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I didn’t see gchart’s measurements and took my own:

~17.35mm where PCB sits

lens: 19.37 × 1.1mm glass, could probably fit up to 19.5-6mm max

9.07mm reflector+glass height
6.57mm reflector led opening

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