No one can find a copy of that board, or we would have been done ages ago. Not sure what happened to DEL, but he is MIA for now.
I am designing the driver presently, and it is near completion. I am using Eagle. I am not terribly good at this, so if you have Eagle and would not mind checking out the present state I would appreciate it. PM me your email if you are interested.
Toykeeper maybe forward that information to Barry so he can inform the engineers who are working on the lantern production prototype that it can be modified that way. I already sent them the LED pad 2-channel design for that part.
I got my right hand today hurt bad
But I can try to get it, hopefully the antibiotics wirk or they ha e to cut my right pointer ng finger open and I will be handicapped a lot longer
Problem is what is U3 for?
No files to start wirh so modding my Q8 driver
Lexel, DEL describes the driver board a little bit in post 736. After the images, at the bottom of the post, it tells what U3 is among other things. Here’s the relevant text:
U3 is a precision DC opamp and does the closed-loop current control for the LED driver (driving a meaty FET in linear mode). A sense resistor creates the feedback signal. The MCU (a venerable tiny85) generates the reference signal. Driver dropout should be < 150 mV, giving regulated control down to about 3.2 V.
U4 is an all-in-one power-bank chip from TI’s BQ24 or BQ25 series (currently looking at the BQ25895, it is also used in the higher end Xiaomi power banks).
I still have itchy spots which crust over then thicken and split open on my arm from a cat bite 5 years ago. Sounds worse than it is, but the point is don’t underestimate animal bites, some of the bacteria they can carry are nasty.
What sort of people does Barry have working for him if they need to be spoon fed everything? Are they simply a build to print contract manufacturer that makes flashlights?
Well, he has already been making a lot of driver designs, so he has plenty of starters to make this from. Changing a few things here and there doesn’t take very long. But, the point remains, and I agree - he’s awesome! Thanks from me too, Lexel!