[Arm-netbook] modifying a 7 inch notebook cabinet to accept apc card

[Christopher Havel]

You use the Arduino IDE to program Teensies, IIRC. They might also have
their own. Code is uploaded directly to a USB port on the Teensy. Have a
look around --> https://www.pjrc.com/teensy/

You *probably* need a Teensy++ 2.0. That is not a guarantee, just a
recommendation. I have not myself played around with Teensies, they're
expensive (relative to Arduino Nano/Micro clones on eBay, and to my typical
budget) and I tend to think in hardware terms far better than anything
software/firmware. I can't really help you beyond what I've just written.

The computer doesn't 'see' keymapping. The computer sees a string of
information that tells it what key was depressed and released and when.
"Keymap" is where the key is in the matrix, which the computer doesn't care
about. The computer cares that you pressed the ESC key and released it x
number of microseconds later, not that it's row 1, column 1 in the matrix.

You should look up the USB HID protocol and the PS/2 keyboard protocol.
Those will tell you a lot of how the computer 'sees' and 'talks to' a
keyboard... and how the keyboard 'talks' back.

On Fri, May 26, 2017 at 12:27 PM, <ronwirring at safe-mail.net> wrote:

> -------- Original Message --------
> From: Christopher Havel <laserhawk64 at gmail.com>
> Apparently from: arm-netbook-bounces at lists.phcomp.co.uk
> To: Eco-Conscious Computing <arm-netbook at lists.phcomp.co.uk>
> Subject: Re: [Arm-netbook] modifying a 7 inch notebook cabinet to accept
> apc card
> Date: Thu, 25 May 2017 17:40:52 -0400
>
>
> > Keyboard is easy if you know a little electronics. A laptop keyboard is
> a matrix keypad. Rows and columns. One key connects one row to one column.
> >
> > Look up a little thing called the "Teensy" -- it is a microcontroller
> board. You can (if you are very good at soldering) connect from the
> keyboard's PCB connector (cut the
>
>
> Can the teensy make the key mapping correct and the key mapping will be
> correct when arriving at the computer's usb port?
>
> PCB and solder to the connector while it's still on there -- no shorts,
> mind you, or it won't work, and the pin pitch is usually insane...) to a
> Teensy and make a "custom keyboard" that way. You will of course have to
> program the Teensy but that's the easy part ;) an Arduino Leonardo clone
> from eBay (also try to find, if you still can,
>
>
> Can you use a raspberry pi 0 to program a teensy?
>
>
> "Arduino Micro" clones -- NOT the "Pro Micro" ones, they won't have enough
> pins). Same code will run there and work just fine.
> >
> > Forget the battery, unless you have a reflow toaster oven (or other
> homemade reflow equipment, or access to the professional gear) -- you will
> need it for the kinds of chips that let computers talk to batteries, AFAIK.
> Too much trouble.
> >
> > I am designing, for a competition on Hackaday, a "made from common
> modules" "laptop" that I'm calling the AnyTop. The goal is that anyone can
> build it if they can use a screwdriver, knife, and some sort of drill. (The
> drill is only needed in one place.) It won't have a battery... but it will
> be a laptop form factor and it will work. Luke, would some discussion of
> this be on-topic?
> >
>
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