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    NeoPiGamer

    Scheduled Pinned Locked Moved Projects and Themes
    gameboygameboy advancegbaneopigamerpi zero
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    • A
      agentKrowka @mrvanes
      last edited by

      @mrvanes Well if you went for 14500 Li-ions - I know what you mean. I am yet to meat a good quality bat. of that sort (they usually have around 900 mah :/ ) Maybe you could try to squeeze in some 16650 bat. But they are a bit too long as far as I can see.
      I am trying to go with a 3.7v 3000mah flat lipo (64x48x8 mm) ... I think I cna fit it in if I rly try hard this weekend :D

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      • mrvanesM
        mrvanes
        last edited by

        Yes, they're 14500's. I made the mistake of ordering 18650's (pack) before I knew the difference (I allways call them AA's when I buy alkalines). Was a bitter surprise when they arrived after 3 weeks transport. But why would they print/sell/advertise 2900 when it's actually 900 (apart from blatantly lying for profit)?

        And yes, you will never fit 18650's in the GBA.

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        • A
          agentKrowka
          last edited by

          I was asking myself the same question and started to dig around to see if there is some similar bat. to AA size which would be better in terms of capacity .
          Found this most helpful thing:
          https://en.wikipedia.org/wiki/List_of_battery_sizes

          As per this apparently the "common" capacity for 14500 Li-ion is 700-800 ... So I guess they print it there just for profit ...perhaps ? Honestly - no idea :/

          One note.. Finding the best battery for the job was always a problem in all my projects that required batteries :/
          Mostly ended up using li-po packs. But with them comes the problem ----- size. They are super nice and flat which is pretty much useless int his project since a 3000mah will be somewhere around (60 to 80) x (80 to 100) x (around 3.5) mm.
          Best I found is 64x48x8 mm
          http://www.ebay.com/itm/3-7V-3000-mAh-Polymer-rechargeable-Li-battery-For-GPS-DVD-PDA-Tablet-PC-814864-/121823784043?hash=item1c5d436c6b:g:5xMAAOSwn8FXRm~T

          There is a option to take smaller capacity and make it as a pack 1s2p (1 series 2 parallel). Not good, since unbalance charging of parallel lipos is dangerous. So unless you find/make a suitable pack that you can take out and charge in external charger this option is useless.

          Last option is to just find one fitting Li-po and go with the capacity that it provides. I think you can find a 2500mAh li-po that would fit your design (with some plastic cutting) .

          If you figure out something different/better I would appreciate if you let us know.

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          • mrvanesM
            mrvanes
            last edited by mrvanes

            I'm sticking with the 1s2p 14500 Li-ion pack I made, if not for the sole reason of aesthetics. I like the look of the blue pack that snuggly fits the original AA container ;)

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            • mooseprM
              moosepr
              last edited by

              I have thought about using the 14500 batteries in mine, but changing the battery box so they are actually in parallel rather than in series. The pi will happily run from 4.2-3.3v if you pipe it straight into the 5v connection on the gpio, and most USB devices will work ok, the only thing I have had issues with, is a cheepo wireless keyboard/mouse from china. tp-link wifi sticks work ok.

              with that setup you will be getting 1800mah from the 2 batteries, but only 4.2-3.3v of course

              I have also thought about keeping the battery box intact, and running from alkaline batteries as a normal GBA would. I have heard (but yet to test) that the pi will run on as little as 2.7v, and if we believe everything we read on the internet, alkaline batteries are in the region of 1800–2600 mAh if you buy good ones. so a nice posh set of Duracell's could actually yield reasonable runtimes!

              want to get a tft into your project, look no further than here https://retropie.org.uk/forum/topic/7464/ili9341-tft-screen-guide

              FlavorF 1 Reply Last reply Reply Quote 0
              • FlavorF
                Flavor @moosepr
                last edited by

                We are using 2 14500 batteries in series in our current Game Pie Advance build. At some point, I'd like to move to using a different lithium pack, but this is quite nice for now. As you guys have said, it's nice to have them fit right into the AA holder of the GBA.

                http://www.flashmasta.com
                http://www.gamepieadvance.com

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                • Tekkaman_SladeT
                  Tekkaman_Slade
                  last edited by Tekkaman_Slade

                  @mrvanes - Congrats on completing your build. It looks great. Nice to know the NeoPiGamer has a spiritual cousin out there.

                  @moosepr - There are benefits to using a good quality 2500mah lipo vs AA cells with capacity and the ability to safely charge directly in the unit being some of them. The pi zero is very energy efficient so 2500mah should get you many many hours of continuous play (6-8+ to be exact).

                  @Flavor - Keeping the AA holder sounds nice, but it takes up valuable space. Removing it will actually give you space for a bigger better battery with adequate breathing room.

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                  • mrvanesM
                    mrvanes
                    last edited by

                    I updated the wiki with some storytelling and comments.
                    http://wiki.mrvanes.com/wiki/mrvanes/view/Raspberry+Pi/Advance+Zero/

                    I am very dissapointed in the so-called 2900mAh 14500's I ordered so I'm doing a second attempt using 900 Trustfires I found at AliExpress. Hope they're more honest and supply better stamina than what I get now. Will do a constant-load stamina test (using some game demo mode) from full charge to Pie lights down before and after to compare.

                    FlavorF 1 Reply Last reply Reply Quote 0
                    • FlavorF
                      Flavor @mrvanes
                      last edited by

                      @mrvanes Nice update, thanks. I did some research on 14500s, too. It seems that most people claim the Sanyo UR14500P cell is the best. I believe the P is for PROTECTED. You can find them on eBay, but they probably won't be as cheap as the ones you already tried.

                      After having played with it for a while now, how do you like the X/Y being microswitchy (as opposed to the A/B being rubber pads)?

                      http://www.flashmasta.com
                      http://www.gamepieadvance.com

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                      • mrvanesM
                        mrvanes
                        last edited by

                        I have no issues using the microswitches as opposed to the rubber pads whatsoever. And my kids (who have never used the original) neither ;)

                        The Sanyo's seem to be great indeed!
                        http://www.dampfakkus.de/akkutest.php?id=20

                        This is the Trustfire (2012)
                        http://www.dampfakkus.de/akkutest.php?id=19

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                        • FlavorF
                          Flavor
                          last edited by

                          With some drilling, 3 new wires, and a fair bit of brainstorming/planning, we were finally able to add X and Y buttons to the Game Pie Advance.

                          0_1477949739735_IMG_7499.jpg

                          http://www.flashmasta.com
                          http://www.gamepieadvance.com

                          1 Reply Last reply Reply Quote 1
                          • space cadetS
                            space cadet
                            last edited by

                            Awesome build man!

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                            • D
                              dukeofhentai
                              last edited by

                              I would love to see a step by step tutorial on how to do this. I want to breath new life into my old gba.

                              THanks.

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                              • _INNATE__
                                _INNATE_
                                last edited by

                                Hi, I'm sorry if you've already answered this question but I can't find it anywhere. I know you replied awhile back to someone asking about how you connected the screen. I understand how you modified it up until what you connect directly to the pi. I'm really just trying to finish up my schematic of my own project like yours so if you have a picture of the connections, that would be extremely helpful. Thank you and wonderful build!

                                Tekkaman_SladeT 1 Reply Last reply Reply Quote 0
                                • Tekkaman_SladeT
                                  Tekkaman_Slade @_INNATE_
                                  last edited by

                                  @_INNATE_

                                  The link in my previous post has all the pinout information for the display I used at the bottom of the page. Use the image in this post to match the display pins to the corresponding raspberry pi GPIO or SPI pinouts.

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                                  • mrvanesM
                                    mrvanes
                                    last edited by mrvanes

                                    Here are the results of the long overdue AA stamina tests of the Trustfire 900's:

                                    Load: NES Donkey Kong Classics Demo mode (start, then leave it alone).

                                    GBA Zero (2 AA's, 3.2" PiTFT, USB hub + USB audio)
                                    Old pack: 1.37:08
                                    Trustfires: 3.21:00 (207%)

                                    GB Zero (4 AA's, 2.8" PiTFT, USB hub + USB audio + USB Teensy + USB Wifi)
                                    Old pack: 2.16:54
                                    Trustfires: 4.36:00 (202%)

                                    So, conclusive it's safe to say that over 3 hours of gameplay are possible on a GBA Zero using 2 Li-ion AA's.

                                    FlavorF 1 Reply Last reply Reply Quote 1
                                    • FlavorF
                                      Flavor @mrvanes
                                      last edited by Flavor

                                      @mrvanes Excellent. I recently bought a couple Sanyo cells, so I plan to do some similar testing when they arrive. This is very encouraging!

                                      I added your info along with some battery test info that I generated over at http://forum.freeplaytech.com/thread-4418.html

                                      http://www.flashmasta.com
                                      http://www.gamepieadvance.com

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                                      • FlavorF
                                        Flavor
                                        last edited by Flavor

                                        BTW, I updated the aforementioned forum post with a new result. While I was previously getting less than 1.5 hours out of 2 14500 cells (which were the cheapest I could find), I now got almost 3.5 hours out of a new pair of the Sanyo UR14500 cells.

                                        This almost perfectly matches mrvanes' test with the 3.2" TFT (which is also what I'm using) with Trustfire batteries.

                                        http://www.flashmasta.com
                                        http://www.gamepieadvance.com

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                                        • E
                                          EemsRoro
                                          last edited by

                                          Hello @Tekkaman_Slade,

                                          I just recently became fascinated by the idea of playing SNES games on a GBA. So much so that I supported Freeplaytech's Kickstarter for Freeplay Zero, a custom board kit for RaspberryPi Zero in a GBA shell.

                                          A few questions:

                                          Is it possible with your build to use the default plastic/glass cover instead of having it exposed as shown?

                                          Would this project be too difficult for a completely new person to modding? I know that's why I got the kit because beside putting it in a shell and modifying some space in the shell for the board, it's pretty simple.

                                          Would you do this project again?

                                          Lastly, about how much money did you put into this? And if you were to build these how much would you sell it for? After exciting talking about this idea I spoke to some friends who would be interested in having me build one if I do one for myself.

                                          Thanks so much!

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                                          • S
                                            SteveyMcGinins
                                            last edited by

                                            Hey I know this is an old thread but WOW!
                                            I've been planning on doing something similar to this but how did you attach the buttons?? I get that you used the old Gameboy Advance motherboard but how did that work? If you could explain to me in detail that would be awesome!

                                            1 Reply Last reply Reply Quote 0
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