RE: HLH - Pi Portable Design blog 2

genebren — Mon, 26 Mar 2018 15:55:53 GMT

Nice update on your Hack job. As usual a very clear and deliberate approach to the problem. Good luck on your build and on the competition.

Gene

RE: HLH - Pi Portable Design blog 2

gecoz — Mon, 26 Mar 2018 07:09:48 GMT

Hi Doug,

I'm not sure if this is what you are after, but here I'm attaching the button matrix schematics from the link you posted (rev 3):

[View:/resized-image/__size/620x296/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-1799cb1f-f74d-40d8-a061-c6b3c0bf1bd2/3566.contentimage_5F00_186858.png:620:296]

[View:/resized-image/__size/620x479/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-1799cb1f-f74d-40d8-a061-c6b3c0bf1bd2/4075.contentimage_5F00_186859.png:620:479][View:/resized-image/__size/620x479/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-1799cb1f-f74d-40d8-a061-c6b3c0bf1bd2/3580.contentimage_5F00_186860.png:620:479]

If, on the other hand, what you are after is the wiring details of the rows/columns pins to the RPi GPIO pins, I'm not sure there is any schema around, because I think you are fairly free to map them the way suits your design best, as long as you reserve 8 GPIO pins on the RPi. The instructions you find here explain how to configure the kernel module matrix-keypad, in order to map your keys.

I hope it helps,

Fabio.