Drops the voltage by 0.6v protecting the LED and reducing excessive drain. They should fit but cant say for sure about size this is just a quick look but will try and find a reliable source that I can get the correct size then will create and test.
I guess I don’t understand the circuit, pyro. The diode is just on one led? What does the back of the board look like?
btw, the pot I linked is 3x3.5mm, should fit your pads :-)
From Oshpark:
It occurred to me that the layout wasn’t optimum
Hey pyro, where did you get your library part for the pot? I want to try playing with it tonight. Yours looks good! So the diode is to protect if the pot is left fully “open”? I’m wondering if it might be better to put a 500ohm or 1kohm resistor for that instead. In the past the diode in series has made the light drop off too fast as the battery gets low.
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.