Looking for schematic of generic 8*7135 driver from FastTech

Flashlight Modding and DIY Parts
1

Do you have schematic for this driver?
I am interested in what pins are connected to stars.
TIY

2

It’s liketly the same driver here .
You can see the vias below the absent attiny.

3

Thanks thefreeman
I am also suspecting it is same as nanjag 105c but since it has 3 stars instead of 4 I am nor sure

4

Ah sorry I didn’t notice there were 3 stars instead of 4.

5

Any reason you are using that driver? You can get a convoy one for arould the same price, or you can buy a programmer to run another firmware. https://budgetlightforum.com/t/-/30672

6

One of those stars is unconnected / always grounded.

Just poke it with a meter, check continuity.

But there’s no guarantee that it’ll be the same µC, either in pinout or its innards.

7

I like the option to change behavior with the stars

8

But are the other 3 stars are the same?

I would if I had it but delivery is ~3 weeks

I can replace the µC if needed :slight_smile:

9

Hello
have this from back in the day :blush:

1 Thank
10

There ya go…

The “blue” star is grounded, ie, does nothing.

11

Yep this is 105c, the question is: is the YJP the same?

12

2 more I found in my Nanjg_105C folder 1 is a schematic!!! cheers

13

best I can do 4ya as these drivers come in many variants the specific board you quoted from fasttech YJP markings with 3 stars not 4 as on 105c is 99% the 1 in my pic hope it helps :wink: google is ur friend
follow numbers to mcu pins

14

Thank you nmbusa, seems like no star is connected to PWM