[Arm-netbook] modifying a 7 inch notebook cabinet to accept apccard
ronwirring at Safe-mail.net
ronwirring at Safe-mail.net
Wed May 31 21:04:57 BST 2017
-------- 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 apccard
Date: Fri, 26 May 2017 12:34:18 -0400
> 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
1 teensy for the keyboard and 1 teensy for the touchpad?
Are there not simpler microcontrollers?
> 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.
It seems to be too complicated.
> 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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