SparkFun Forums 

Where electronics enthusiasts find answers.

Questions relating to designing PCBs
By plusea
i want to design a tiny 3mm thick PCB and since it is super expensive (170$ for 10pcs) to order 3mm thick PCBs, i'm wanted to ask advice on what people with experience think of this design and what issues i might run into.

the board is super simple - basically a breakout for a mini Neopixel (SK6812MINI) where the LED is mounted at one end and the grooves are the 4 Pins (+,-,Din, Dout). shrink-tube is used to couple a 2mm diameter sideglow optic fiber in front of the LED. and conductive thread is used to sew the contacts to the plated half-via groves.

here some photos of my handmade prototypes:



here a rough sketch:


here the dimensions i have in mind:


- what could be issues with milling such small boards?
- if the narrowest part of the 3mm thick board is 1.5mm wide, does this become a weak point or is the FR4 strong enough, especially since it will be a plated via at that point?
- in order to minimize waste, could it be possible to layout the boards as illustrated above so that two boards share the same plated via?
- any tips on PCB manufacturing services that do 3mm thick PCBs in small quantities? seeed studio costs 170$ for 10pcs.



// more photos here: ... 1569545895)
// more documentation here:
By lyndon
Actually, thinking more about it, I'd use a more "normal" PCB size with a right-angle light pipe to attach the fiber. I assume that standard fiber optic connectors would be too bulky?
long long title how many chars? lets see 123 ok more? yes 60

We have created lots of YouTube videos just so you can achieve [...]

Another post test yes yes yes or no, maybe ni? :-/

The best flat phpBB theme around. Period. Fine craftmanship and [...]

Do you need a super MOD? Well here it is. chew on this

All you need is right here. Content tag, SEO, listing, Pizza and spaghetti [...]

Lasagna on me this time ok? I got plenty of cash

this should be fantastic. but what about links,images, bbcodes etc etc? [...]