Quick questions

[PapaKev]

Hello All,

New to pedal building, but experienced in project building. I think I have most everything figured out, but have a couple questions. I've did deep dive searches but haven't found anything specific. Sorry if I missed it.

Does the power supply need to have a negative or positive center pin? (Building the Impv2 first). I thought I had this figured out but have confused myself to the point I don't trust my decision.
This may seem petty, but I'm pretty anal with getting things correct. What size LED is used? 3mm 5mm or other? I'm guessing 5mm but what to make sure.

Thank you for your help. Looking forward to building a few of these for my son.
-Kevin

[madbean]

All projects are center tip neg. unless otherwise indicated in the build doc. There are some fuzzes that are positive ground but still use negative tip for power. I think the only truly positive ground project I have right now is the Total Recall.

You can use any size LED you want and that fits. For 1590A projects I stick with 3mm b/c that is what's proportional to the enclosure size. I use 5mm for almost all other projects.

[PapaKev]

Thank you!