类型: IC
作者:
dr_derivative
发布时间: 2019-04-29 10:06:18
更新时间:
2019-04-29 10:06:18
原链接:
https://geekhack.org/index.php?topic=100452.0
Some time ago I designed a standard 60% PCB for
SMK 2nd generation switches. Currently there is no 60% SMK PCB on the market; there
was an IC on DT some time ago that never progressed and a
Chinese GB that is no longer available AFAIK. If there is
enough interest I could run a groupbuy for this PCB,
probably some time during the summer.
Image stolen borrowed from DT wiki
I have ordered some
prototypes since I wanted a couple of these PCBs for myself
anyway. These protos should arrive in a few weeks. If I were
to run a groupbuy for this I would likely need another proto
round anyway, so feel free to request any changes you wish.
All the specs given are for the current prototype and can
still be changed.
Also, if anyone wants I could write a
big-ass guide to SMK 2 nd gen switches before the GB for
people who don’t have much experience with them.
Layout support
More layout support can be added if it is requested
in the IC. While there is a little bit of swiss cheese on
the bottom row I don’t really want to remove layout support
since there is no alternative PCB people can use if their
layout isn’t supported by this one.
Specs
- Standard 60% PCB
- Compatible with both PCB and plate mount SMK 2nd gen switches (with & without legs)
- Supports common switch positions for both Cherry and Alps keycaps
- USB Type-C (I can also use a universal footprint and make a Mini-B version available maybe)
- Has all resistors needed for USB C-C compatibility
- Static and short-circuit protection
- Powered by an STM32 chip
- QMK compatible
- ENIG (gold finish) pads
-
Green soldermask (‘cause it looks classy AF)
Estimated Pricing
Based on some quick back of the envelope calculations I expect the PCBs to cost around 30-35 (~$33-$39 USD) + shipping, etc. I’ll get some more accurate quotes closer to the GB stage to finalise pricing. These estimates are at pretty low MOQs since I expect this to be a pretty niche PCB, but the price will of course come down if we hit higher MOQs.