5*7135 regulator chips that will allow a standard 14500 Li Ion battery to run with custom firmware up to 1750mA to the emitter (vs the 500mA boost on AA, or 800mA linear with Li Ion)
Top
Bottom
Standard BOM from a Nanjg 105C, you can either strip a 105C or purchase the materials separately for assembly Digikey shopping cart (courtesy of Comfychair)
Original design and motivation provided by Mattaus
(only took me about 10 tries )
Added the tPaste and bPaste layers to the gerber build so now it should work at OSHStencils in generating proper stencil files Files here
Revision V1.01 (just cosmetic, added BLF SK68 to bottom and added the paste layers to the .zip file)
Below for OP
Ok Mattaus
Using your Eagle Tutorials and your starter boardā¦this is what I came up with
Using what you started withā¦this is the horrible boardā¦not finished and probably has a million errors
Sure, you can improve a lot of things but its not horrible IMO. Its a first board. Those 0.1 vias are the only thing Iām seeing that would really prevent it from working. Eagle shows a bunch of airwires (thin yellow signal lines) because some of your wires were not connected properly with the route command.
One VIN trace is a bit close to an attiny pad.
0.254mm is ok for signal lines. When there is room is good to make traces thicker. For the LED- out trace from the 7135s, you could just throw an arc over it to thicken it. Not proper but it would be easy & will work.
You just want a functional board that you can order to start out with, right?
Oh, the center positive circle on the bottom is missing bStop. It will be covered in soldermask as it is now.
By default eagle places tStop & bStop on vias. They will be exposed, uncovered my soldermask. Personally I like covered ātentedā vias but its not a problem.
Yea I saw thatā¦I put it onā¦but ran out of time (had to get ready for work)
Pretty much a functional āprototypeā just to see if I can put on in a standard SK68 and put a 14500 in it with STAR firmware (more or less a pocket rocket from what it is now)
Tell me about itā¦.thus my endeavor to create the non āwhy did I screw up my driverā filing method
I originally asked Mattaus to assistā¦but he has MUCH bigger projects to work on
I think his Eagle tutorials were a kind way of saying āMake your own damn boardā
Soā¦here I izā¦trying not to screw it up too muchā¦once I get a working board [still heavily in the prototype phase]ā¦I will put it up on the OSHPark projects
However wight in the Knucklehead Buck Driver Discussion thread gave us a quick tutorial on how to remove those, so you bet I will be hiding the snot out of the vias where possible
Looking good but need more vias between input + and L. Move the via at R1 north, slide R1/R2 west and north to allow U1 to also move west allowing space for more vias. Also, on mcu side, shift L- via from 1:30 to 10:30 and drop L+ to 4:30 to line up with wire notches in mcpcbās.
Edit- also increase solder pad are for ground tab(not ground pin).
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