3 ms·
I didn't know that castellated holes on a PCB were to facilitate SMT. Sure makes it look like a stamp though… ;-)
by JKCalhoun 11mo ago
I didn't know that castellated holes on a PCB were to facilitate SMT.
Sure makes it look like a stamp though… ;-)
- adolph 11mo agoCastellations also enable use in a "burning fixture" like the below. The fixture has bent pins that hold the PCB physically and connect electrically to the PCB's leads. https://www.amazon.com/DIYmall-ESP32-WROOM-32-Programming-Fixture-Download/dp/B09WD3DFP8 https://www.amazon.com/DIYmall-ESP32-WROOM-32-Programming-Fi...
- geerlingguy 11mo agoWould love to see someone design a PLCC or IC Socket that would let you slide one of these in (like those old sockets they had in Macs for optional FPU chips).
- adolph 11mo agoI just looked that up and it seems like a nice system (although physically complex/costly to manufacture) [0]. The only FPU-optional Mac I had was a IIsi which had an optional FPU that used the Nubus slot. 0. https://www.worthpoint.com/worthopedia/macintosh-color-classic-fpu-math-co-1854196246 https://www.worthpoint.com/worthopedia/macintosh-color-class...