ah…forgot about that
And I guess if you get a good off time build you probably won’t be reflashing that often huh?
ah…forgot about that
And I guess if you get a good off time build you probably won’t be reflashing that often huh?
Yeah, that’s a minor problem…
This version has:
I haven’t gotten things 100% worked out with where I’m removing the solder mask for LED- and LED+.
First set is on the May 04 panel!
tStop on minus pad
need - and + on tDocu
And I usually make the identifiers .6~.8 but that’s just me (yeah…nitpicky I know)
And need a BLF on it somewhere
I did mention that in post #10. There’s plenty of copper there to solder to. I’ll probably leave both pads covered in the next version and remove the mask from at least part of the two big vias. If someone wants to solder to the small 1x1mm surface area they just need to scrape.
Identifiers? The GND vias are 0.5mm because that’s what fits.
The tDocu letters R1, U1, the white letters on the silk screen (identifiers ???)
Still a pretty darn cool design
Oh, gotcha. I just ignore that stuff until the rest is sorted out.
Is R1 a resistor or diode?
Depends on whether D1 is populated with a Zener diode or not.
I was confused why there is a zener diode for a single cell flashlight driver. I'm guessing you're designing in options for use in other lights later on?
It looks good.
Well, really just for flexibility. Mainly as you say - in case someone wants to use it in a different light. Also though, someone might choose to run the F13 on a pair of 18350. Or if some battery manufacturer ever made a good 26350 :drool:
Thanks, I couldn’t reconcile the print and the pictogram.
Or if some battery manufacturer ever made a good 26350 :drool:
Don’t tease me bro.
What did I change? I don’t know. I spent too much time tweaking stuff tonight.
Just for fun, here are the drills:
I realized that there was no reason for the exposed copper GND ring on the bottom of the board in this application, and it’s actually a pain because it prevents you from easily aligning the 7135’s. So I put the mask back over that and removed the mask from the vias because I think that looks cool and why would I need a better reason than that I also realized that I do not have a polarity marking for D1. Oops. Hopefully that gets fixed in a future revision. Maybe I’ll feed the voltage divider directly from BAT+ in a future revision too.
First set is on the
May04 panel!
My first set is on the June 06 panel Can’t wait!
Very nice!
The drills looks like the starry sky
Those thru hole wire positions are nice…huge thick wires can be used…excellent
What is the 7135-A and B for…not populating all the 7135 positions for zener builds??
Very nice!
The drills looks like the starry sky
Those thru hole wire positions are nice…huge thick wires can be used…excellent
Thanks! Starry sky was my first thought as well, I was paying attention to something else and it took me off guard when I scrolled past the drills on Oshpark.
What is the 7135-A and B for…not populating all the 7135 positions for zener builds??
* I marked two sets of 7135’s: “A” and “B”. You must place a 7135 or jumper to GND with at least one location from each set. Each set has 4x 7135’s in it, two on top and two on bottom. It should be really easy to make sure at least one from each set is populated.
All the 7135’s on the bottom are grounded…
I’m a bit confused…the center pin on the 7135 has a solid connection all the way thru underneath to the tab on the back…so the bottom side with the spring, when you solder them down they are all automatically grounded
And I see the thru holes from the bottom go to the top sides, so they too would be grounded…correct?
And on the top side, you could put a simple trace from the back pad to the ground ring under the solder stop
Ah, but if they ain’t there in those A and B position…no under the chip ground path…NOW I see it…DUH! (smack head, coulda had a V8 moment )
Not everybody wants 16*7135 inside these little flashlights! I imagine that this PCB will generally be used with something in the range of 4*7135 to 12*7135.
There are two portions of the circuit which required ground paths and do not have a direct connection to the main GND ring.
C1 is the easiest example to look at. It obviously has no ground connection unless one of the 7135-A placements is populated. We are using the “solid connection” you mentioned as a zero-ohm jumper to get past the blocking trace!
Since I used a complete ring on both sides there is actually space to break the PWM and LED+ rings and allow a path to GND. Maybe I’ll do that. Personally I like complete rings and I see no scenario where at least one position on both A and B wouldn’t get populated.