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Author Topic: "Drop-In" PCB Hardware Mod for the TI-83+SE  (Read 20710 times)

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Offline TIfanx1999

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #30 on: January 31, 2014, 04:41:59 pm »
I was actually thinking a phone battery or something similar might be the way to to. Some cameras have pretty small lithium ion rechargeable battery packs as well. Also, what about the GBA SP or Nintendo DS? Those batteries might be worth checking into as well, though I am unsure of the size.
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Offline Keoni29

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #31 on: January 31, 2014, 06:31:52 pm »
I have one of those from my broken ds. I will look up the pinout and see if I can put it to use.
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Offline Geekboy1011

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Re: Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #32 on: January 31, 2014, 07:27:18 pm »
They are marked +/- and that's it! Nice and easy I like that idea to.
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Offline DJ Omnimaga

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #33 on: February 01, 2014, 09:44:14 am »
Just avoid the older iPhone batteries, since they seem to have an history of expanding or exploding. But choose one that isn't too expensive either.
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Offline Geekboy1011

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #34 on: February 01, 2014, 12:06:04 pm »
The ds one is about 9$ for an official one and the nockoffs are about 3-4$ so cheap enough by my standards!
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Offline Geekboy1011

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #35 on: February 01, 2014, 09:16:36 pm »
Got the start of a schematic going not sure if its all done right. Can someone check my math/configurations for me. I can answer questions as needed. Just do not want to fab the board and lose the money if its wrong.



Edit Sorunome: resized image
« Last Edit: December 09, 2014, 08:03:53 am by Sorunome »
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Offline Keoni29

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #36 on: February 02, 2014, 04:55:44 am »
I built an ATmega328 in my calculator once and the reset line was tied to the ON button. It works fine.
How are you going to wire up the usb? You cannot put more than two devices on the serial bus.
I assume you pulled the charger and regulator circuits from the datasheet of those IC's, so I can safely assume those are allright. I'd make a prototype first before you order a pcb. With some smd prototyping board you could maybe even fit it inside a calculator.
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Offline Geekboy1011

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #37 on: February 02, 2014, 01:25:04 pm »
for 3 of the pcb's its only like 15$ which really isn't that expensive i actually think the prototyping board is more costly.

I am also using the atmega32u4 which is the device in the arduino leonardo. Which has a built in usb slave controller so no VUSB good proper usb <333


Any tying it to the on button wont work for this instance as the on key is used to arbitrate things in cn2 programs but I like that idea for a normal project!
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Offline Keoni29

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #38 on: February 03, 2014, 12:18:06 pm »
So, how are you planning on connecting both the calculator and the microcontroller to the same usb port??
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Offline Geekboy1011

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #39 on: February 03, 2014, 02:48:15 pm »
They are not thats the trick. The calculator is connected to the atemga via its link port then the arduino acts as the usb device. With some code the arduino acts as one of a few things, In this case they are a silverlink and a GCN hub. The usb also charges the battery that is powering everything. So yeah.
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Offline Keoni29

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #40 on: February 03, 2014, 05:16:54 pm »
So that leaves you with a spare connector at the back of the calc: the linkport. You can hook up sound output to that for example :D
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Offline Geekboy1011

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #41 on: February 03, 2014, 05:31:21 pm »
That' has been the intention, I plan on putting a low powered speaker built inside the case of mine at least. Just to be able to say hey I want music!
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Offline Keoni29

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #42 on: December 08, 2014, 06:47:14 pm »
*bump* Any progress?
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Offline Streetwalrus

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #43 on: December 08, 2014, 06:49:21 pm »
Yeah, I wonder too since I'm also interested in this mod. :)
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Offline Keoni29

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Re: "Drop-In" PCB Hardware Mod for the TI-83+SE
« Reply #44 on: December 08, 2014, 06:51:41 pm »
Esp. because of the atmega inside. If enough people install one of these in their calc I plan to port TIMID to this chip.
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