Quality Control

Published on 2017-08-29 in PewPew FeatherWing.

I’m waiting for the parts for the first “production” batch of the PewPew Lite boards — just around 20-30 of them, to sell on Tindie. The LED matrices just arrived from the usual Aliexpress seller, and I decided to use one in an older prototype. Turns out that a green LED in one of the corners is dead.

Since the pins are responsible for whole rows or columns, it can’t be a bad connection. That really made me nervous, so I quickly assembled a testing rig for those matrices and tested all 30 of them:

I found one more faulty matrix, this time one pixel is noticeably darker than the others. All the other matrices seem to be fine. Caveat emptor.