Adding USB-C charging to a Skilhunt H03

zeremefico · December 31, 2019, 9:06pm

Great work!

Nachtfeuerzeug · December 31, 2019, 9:26pm

Nice mod! What did you use to cut that hole in the side?

tterev3 · December 31, 2019, 10:21pm

Combination of Dremel, drill, and small files

chadvone · December 31, 2019, 10:26pm

Awesome!

I have misplaced my H03.

MRsDNF · December 31, 2019, 11:02pm

Not sure I love black magic but do love your work.

Jerommel · December 31, 2019, 11:25pm

That’s a pretty amazing bit of modding.

Agro · January 1, 2020, 10:12am

So awesome…

Trail_Trek · January 1, 2020, 11:24am

Absolutely fantastic work!
Makes one of my favorite 90 degree lights even better.

gchart · January 1, 2020, 4:23pm

Fine work on that, tterev3!

A couple questions:

What was that original QFN MCU? I will likely be reverse engineering the UT01 soon and noticed it has an attiny44 on board, something I wasn’t expecting. I’m not sure if I’m going to replace the MCU (likely with a attiny816) or design a whole replacement driver.
Where did you get that simplified USB-C jack? It looks like something I might want for future projects.

tterev3 · January 1, 2020, 5:23pm

I’m not sure, it’s a very small 3x3 package that was covered in black silicone potting so it’s hard to make out any markings. I’ll check again

If you search eBay or similar for “Type C Female 6Pin SMT” you can find them

tterev3 · January 2, 2020, 2:52pm

Here’s the original microcontroller. It’s a 3x3mm QFN-20 marked 3AQ20 which seems to be a Nuvoton 8051-based part

Kame_Sennin · January 2, 2020, 3:42pm

Amazing work !

Agro · January 15, 2020, 9:12pm

Just to confirm…H03 has a separate e-switch PCB, right?

tterev3 · January 15, 2020, 9:21pm

Yes, with an indicator LED as well

Agro · January 15, 2020, 10:02pm

thx

djozz · January 15, 2020, 10:19pm

Very impressive, and a nice inprovement over the stock light! Thanks for posting about it.

Sirius9 · January 15, 2020, 11:03pm

Wow, very nice work

SKV89 · January 16, 2020, 3:25am

Truly impressive!

djmcconn · January 16, 2020, 3:40am

tterev3 No wonder I’m such a doofus. You and Davidef used up all the brains here in NC! Excellent work and well done on illustrating the process.

Sunnysunsun · February 19, 2021, 12:26am

Hi tterev3, hopping over from your D4v2 usb-C thread, how did you wire your tp4506?
The premade boards online all seem to use a whole bunch of capacitors and extra resistors but looking at your build, they seem completely unnecessary?

I’ve analyzed your wiring using your photos and a pdf from online and the best I could come up with was this:

Pin1: Temperature sensor pin- Connected to Pin 3 to bypass temperature limiting
Pin2: Programming pin- Connected to Pin 3 with a 1.2kohm resistor for 1A charging
Pin3: Ground pin- connected to USB-C Ground pins and Battery Negative
Pin4: Vcc- Connected to USB-C VBUS and Pin 8
Pin5: Battery- connected to Battery Positive
Pin6: Standby- not connected in your case. Would be used to to indicate the charging is done (Typically connected to a green LED)
Pin7: Charging (To indicate battery is charging (you’re connecting to your microcontroller, but typically connected to a red led)
Pin8: Enable- Connected to Pin4. Idk what this one does, enables the whole circuit to turn on? I assume connecting this directly to VBUS is enough to enable the charging?

Is my analysis correct? The perspective of your photo confused me a bit, and the documentation online was also a bit difficult for me as a beginner to understand.

Thank you, this was quite a long post for a very specific question and I understand if people don’t want to take the time to read it.