Do or Donut SAO

donut shaped LED matrix SAO

Why do I start stuff like this?

Do or Donut SAO | check stock before deciding on parts

2019-11-27 20:45:04

The title says it pretty much, but I had some trouble getting somewhat reasonable priced IS31FL3731 in SSO, while you can get the QFN version just anywhere. My current BOM for one donut is around 7 Euros now, which still seems reasonable. 800 LEDs in 0603 are coming my way, too. Hundreds of red, yellow, orange, green, blue, white, pink and purple.

Do or Donut SAO | check stock before deciding on parts

2019-11-27 20:45:04

The title says it pretty much, but I had some trouble getting somewhat reasonable priced IS31FL3731 in SSO, while you can get the QFN version just anywhere. My current BOM for one donut is around 7 Euros now, which still seems reasonable. 800 LEDs in 0603 are coming my way, too. Hundreds of red, yellow, orange, green, blue, white, pink and purple.

Do or Donut SAO | Routing is done, PCB ordered

2019-11-24 23:06:03

I've chosen to go with JLCPCB and order 5 white test boards and a bunch of LEDs.

https://cdn.hackaday.io/images/5365441574631713184.png
https://cdn.hackaday.io/images/1544051574631713561.png

Do or Donut SAO | Routing is done, PCB ordered

2019-11-24 23:06:03

I've chosen to go with JLCPCB and order 5 white test boards and a bunch of LEDs.

https://cdn.hackaday.io/images/5365441574631713184.png
https://cdn.hackaday.io/images/1544051574631713561.png