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Raspberry Gear with Pi 3 Questions
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Please be positive and constructive with your questions and comments.

Raspberry Gear with Pi 3 Questions

by njgsx96 on Thu Apr 14, 2016 11:14 pm

I am looking to build a Raspberry Gear following your instruction but using a Pi 3. In your instructions you mention any Pi can be used but with slight changes. What changes, if any are needed to reliably run the Pi 3 in this case?

-Is the 2500mAh battery going to be enough for 2-3 hours of gaming? Or should I step up to a 4400 or 6600 size?
-Will I still be able to use the PowerBoost 1000 basic or will that not do with the Pi 3?
-Any other changes I need to make to get this to work properly?

And then finally a separate question regarding the capacitive buttons on the back... are those to be the L and R buttons? I am trying to figure my layout as I was planning to add 2 more buttons to the front, just under the 2 already there.

thank you so much for providing these instructions and any information you can provide.
Thanks, Rich

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Re: Raspberry Gear with Pi 3 Questions

by adafruit_support_mike on Sat Apr 16, 2016 10:17 pm

First, download a copy of the RetroPie OS image and see if it works with the Pi3.

There's a lot of new hardware in the Pi3, and not all OS images have been updated to work with it.

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Re: Raspberry Gear with Pi 3 Questions

by adafruit2 on Sun Apr 17, 2016 7:00 pm

power wise, the Pi 3 does draw much more current. the powerboost 1000 may be OK running it but its at the edge of the capability. 2500mAh battery can probably run it, but wont be for as long. we just dont know for sure tho!

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Re: Raspberry Gear with Pi 3 Questions

by njgsx96 on Sun Apr 17, 2016 10:05 pm

Thanks guys for the replies!

I got the Game gear apart last night, took out all of the insides and started looking at fitment of everything. The Pi 3 will not fit where you have it in the instructions unless I remove the USBs, which I might do, since you have that in your instructions anyway. I was hoping to add 2 buttons below the stock ones as well as opposed to the capacitive buttons on the back, which affects fitment even further. Unfortunately I have to go away on business this week so I will not be able to go further until I return.

As it stands, I am going to build this with the Pi 3 in mind and see how it goes. Hopefully the powerboost 1000 is OK and I can always go bigger on the battery later if the 2500mAh is not enough. I am looking for 2-2.5 hours, which I think it should be able to do. Worse comes to worse, I can go with the Pi Zero, which I have a few of and then have no issues at all, but have limited capabilities when compared to the Pi 3. If so, the Pi 3 will be used for a different build, no worries!

Thanks again and hopefully I will have some progress to update next weekend!
Rich

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Re: Raspberry Gear with Pi 3 Questions

by njgsx96 on Tue Apr 19, 2016 5:22 pm

Doing some more researching, the Pi 3 is looking to be just not possible with what I am looking to do. First, it will pull more power than I thought, and I also forgot to add in draw from the screen. I would be lucky to get an hour out of the 2500mAh battery, if it can even provide a stable source of power. Also, under load, the powerboost might not be able to handle it properly if it needs more than 1A. However, it SHOULD handle the Pi 2. I know your instructions call for the Model B+ 512MB, but all things being equal, what are your thoughts if I swapped in the Pi 2 instead?

I am still tempted to try the Pi 3 and I still may, but I think I know the outcome.

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Re: Raspberry Gear with Pi 3 Questions

by njgsx96 on Sun Apr 24, 2016 10:49 pm

I made good progress on my build this week. Case is just about completely modified, capacitive sensors are ready to go and I modified the display as shown in the directions. Which leads me to my next question. I am going with the Pi 2 and as such, there is no composite video adapter on it. I didn't think of this prior to modifying the connector cable so hopefully all is not lost. I do see on the page explaining wiring the rear case, there is a snapshot of the bottom of B+, showing to solder to points there (labeled PP24 for the composite video signal). the Pi 2 has these as well. I am assuming this means I can use these points for the composite signal (and audio it looks like). Can you verify that for me please?

Thank you so much! Can't wait to complete this project!

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Re: Raspberry Gear with Pi 3 Questions

by adafruit_support_mike on Mon Apr 25, 2016 2:12 am

I'm not sure about that detail. Check over in the Pi Foundation's forum and see if the board's designers have more information:

http://www.raspberrypi.org/forums/

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Re: Raspberry Gear with Pi 3 Questions

by njgsx96 on Mon Apr 25, 2016 9:58 am

Thanks for the advice. I did a quick search on the forums and it looks like they call PP24 a "test port", although I did find a few folks who used it for the signal so I guess I will give that a try and we should be good. I guess a test port is as good as anything else since it does work. I saw I might have to adjust the config file to accept composite so I will check for that as well.

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Re: Raspberry Gear with Pi 3 Questions

by njgsx96 on Thu Apr 28, 2016 2:17 am

I have a question regarding the wiring, specifically the switch. In the diagram, the switch is run to the powerboost but in the actual picture of the wiring, it is wired to the Trinket LiIon/LiPoly Backpack Add-On. Which one should it be wired too? I am leaning towards the backpack (have the cut the lead there, right?) but wanted to ask to be sure.

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Re: Raspberry Gear with Pi 3 Questions

by njgsx96 on Tue Jun 07, 2016 12:01 am

I wanted to update my thread here. As I mentioned earlier, I decided to not go with the Pi 3 and went with a Pi 2. I actually had some issues that I ran into and ended up taking apart the whole thing and taking a 2 week break. I was able to return last week, renewed and in full force. I de-soldered the USBs and the LAN. Even though I scraped the lining inside as best I could, I sprayed the inside of the case with a rubberized paint as well for good measure. I dropped the capacitive buttons for 12mm tactile buttons and in the process of soldering the stock buttons, the pads came off so I went the copper tape route for all of the buttons. I had some button bounce but changing the capacitive pads, spacing the copper a little more and adding a delay in the teensy code seems to have fixed it and they work well. Also I hogged out the inside a bit more to fit a 4400Mah battery. I was able to assemble it and get it all loaded this weekend and overall I love this thing! So much fun and so much better than I could have imagined. It came with some lessons learned though, like...

-Learning Arduino is hard
-Take your time
-Plan everything, solder, test and assemble, in that order!
-Don't use crazy glue on the Game Gear case - it ruins everything it comes in contact with!
-A cig punch cuts the perfect hole in rubber to fit over a 12mm tactile button
-If you don't think you can do it, try anyway!
-Always buy extra parts - if you don't need them, someone you know might!

I learned a lot more of course but those are some quick ones. I maybe even have some changes if I am to make another, although I want to try my hand at a Pi Zero Gameboy next. Already have the parts!

Huge thanks to this forum and others and to Adafruit for providing amazing parts, service and direction!
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Re: Raspberry Gear with Pi 3 Questions

by adafruit_support_mike on Tue Jun 07, 2016 4:59 am

That's easily the best post I've read today. ;-)

I'm glad to hear you got it working, and thanks for following up!

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Please be positive and constructive with your questions and comments.