- [Hardware] A Raspberry Pi inside a TI-84+
- 10 Nov 2014 12:19:39 pm
- Last edited by Muessigb on 26 Feb 2015 11:40:58 am; edited 6 times in total
Hello,
This is the question thread for Raspberry Pi meets TI-84+
I'm currently working on a Raspberry Pi with a touchscreen lcd (as I killed the original 84+ LCD as it has such a a small connector (@Kerm you haven't a spare 83+ lcd laying around?)), normal rechargeable batteries that I boost to USB (the pcb includes a charger chip for charching them and a booster one), and I'm trying to write a linux Kernel module input driver for my keypad matrix
I successfully figured out the keypad matrix, but I really screwed it up by cutting the board to small and accidentially dropping solder onto one pad (i sucked it up and the pad connecting to the next column died in the solder sucker :/)
Well. Today I contacted (as I'm still at school) the person, who lends the calculators to the students and asked him for a broken 84+, which was given to me for free! But it *sadly* still works. Should I kill it or do you think that I could be able to get the pad back).
Pictures are here:
http://imgur.com/a/o8EBc
---------------------
EDIT:
Ok don't mind that stuff above. I ruined multiple partially or completly working calculators, trying to get it working. I recently resumed the project and bought me a Raspberry Pi A+ instead of the way bigger model B+ I had earlier. Then I drilled out the battery department, as it will run from a phone battery anyways. It will have USB host and audio + analog video out, a charging port, but no hdmi.
I'm not sure about the screen. I have the choice between an original TI-83+ LCD (attached to a partially working TI-83+, that would then be detached) or a TFT, which's width is a little to small. Note that the TFT has a builtin touchscreen and is already fully supported, and has kernel modules to download. But it needs more wiring, doesn't look authentic, consumes more power and needs way more signal cables to work (parallel), increasing the size dramatically.
My biggest worries are still about the size, as there's little to no space for the Pi + LCD + Keypad matrix.
Also the keypad matrix is a lot of work and needs a proper linux kernel driver, that needs to be written.
This is the question thread for Raspberry Pi meets TI-84+
I'm currently working on a Raspberry Pi with a touchscreen lcd (as I killed the original 84+ LCD as it has such a a small connector (@Kerm you haven't a spare 83+ lcd laying around?)), normal rechargeable batteries that I boost to USB (the pcb includes a charger chip for charching them and a booster one), and I'm trying to write a linux Kernel module input driver for my keypad matrix
I successfully figured out the keypad matrix, but I really screwed it up by cutting the board to small and accidentially dropping solder onto one pad (i sucked it up and the pad connecting to the next column died in the solder sucker :/)
Well. Today I contacted (as I'm still at school) the person, who lends the calculators to the students and asked him for a broken 84+, which was given to me for free! But it *sadly* still works. Should I kill it or do you think that I could be able to get the pad back).
Pictures are here:
http://imgur.com/a/o8EBc
---------------------
EDIT:
Ok don't mind that stuff above. I ruined multiple partially or completly working calculators, trying to get it working. I recently resumed the project and bought me a Raspberry Pi A+ instead of the way bigger model B+ I had earlier. Then I drilled out the battery department, as it will run from a phone battery anyways. It will have USB host and audio + analog video out, a charging port, but no hdmi.
I'm not sure about the screen. I have the choice between an original TI-83+ LCD (attached to a partially working TI-83+, that would then be detached) or a TFT, which's width is a little to small. Note that the TFT has a builtin touchscreen and is already fully supported, and has kernel modules to download. But it needs more wiring, doesn't look authentic, consumes more power and needs way more signal cables to work (parallel), increasing the size dramatically.
My biggest worries are still about the size, as there's little to no space for the Pi + LCD + Keypad matrix.
Also the keypad matrix is a lot of work and needs a proper linux kernel driver, that needs to be written.