I can change the pad then people can choose what they use but your right a resistor may work better, but wouldn’t give polarity protection.
Yeah I wasn’t thinking about reverse polarity. I tend to put my batteries in the correct way 
:zipper_mouth_face:
Yeh so do I but you never know
.lbr file is here
Thinking of just making an order of some then measuring and making sure before any boards are ordered. What value are we thinking 20k? 50k?
To be able to make it really dim definitely 50K, perhaps even 100k (you can always set it lower)
Polarity protection is only needed with the pot fully open I guess? In that case when setting the pot you have to be careful, when it is set you can just put in your battery the wrong way around with no damage to the tail leds?
I use clear perspex spacers so can get away with even lower brightness and longer run times I’m leaning towards 50K then use the D1 pad to set the lowest available value around 10K
where do you get that perspex? Wouldn’t the LED’s themselves be reverse-polarity protection?
Yes I suppose that’s true. They are the ones from aliexpress
I make the spacers myself, I have a chunk of 2mm clear perspex. Drill a 7.5mm hole, saw a squarish piece around it and then sand it round to size with the disc-sander.
Would you mind posting a link? The link I had in the op originally now redirected to a completely different product, so I deleted it.
Thanks
uhh is the brown just a peel off paper or something? I think that’s the link I had originally, but the pictures used to show clear
Oh that’s not right! Bare with me!
Appears they no longer stock them. I have quite a few if you’re in need.
Found! HERE
lol that looks better. Do those require any trimming at all?
I haven’t had to trim any so far but depends on the light being used.
Cool. The smaller ones from Home Depot I always have to increase the interior diameter a bit to fit over the switch.
What Home Depot dept? I have a step drill.
They’re nylon washers, in the hardware/screws/nails aisle at my home depot. I also use a step bit to drill out the middle.
They’re not exactly clear, but they help to diffuse the light more evenly under the boot at the cost of some efficiency.
Linked at the bottom of the OP
Thanks. I think Orchard Supply might also have them. That’s where I normally get nylons.
A while ago I realized 17mm was still too big for many lights. A few months later, I have finally gotten around to shrinking the pcb down to 16mm. While I was at it, I enlarged all pads bigger than they were on v3, and added the pot footprint (thanks pyro for the idea and .lbr). Also, instead of adding 1 or 2 more vias, I made all vias much larger than before. The only negatives I can think of vs the 17mm v3 board are:
- The two sides are now dependent, you can’t just cut a trace and have two distinct circuits
- The spring pad diameter has gone down from 10mm to 9.5mm
As always, let me know if you see any errors.
I was thinking about doing one with the pot right in the middle of the spring pad. Thoughts?
My initial concerns:
I don’t know if the pot case is electrically neutral
It would make spring bypasses more difficult