This is my first post here, so I apologize if I missed any rules for posting - please let me know if I did
I was wondering if anyone has given any thought about making a fully portable recurBOY - with an output display and a battery pack. I have one of those car backup camera LCDs which needs 12V and a power draw of 3W. I have no idea what I am doing but I believe I calculated that 3000mAh battery would probably get me an hour or so of battery life.
A gameboy shell would be pretty sweet! Would be pretty rad to show up to a set with all gameboys - some with LSDJ for tunes and some with recurBOY for visuals
One of the main objectives of my fully portable setup is to be able to effectively battery power the recurBOY, its 1.8" control LCD, and a 3-4" composite output display.
It looks like this could be achieved with a 3.7V LiIon battery, TP4056 for charging, and an MT3608 to boost voltage. The MT3608 can boost up to 28V and thus should be sufficient to power my cheap 12vdc car backup display. Here’s why I think the adafruit PAL/NTSC display is what I need to use:
If MT3608 is boosted to 12vdc to power the car backup display, the raw 3.7vdc from the battery would directly power the rpi and 1.8" control display. I don’t think this will work as most documentation says you need at least 5vdc to power the control display.
I could use two MT3608, one at 12vdc to the output display, one at 6vdc to the control display, and then run raw 3.7vdc from battery to the rpi. I haven’t been able to find reported success running these boost converters in parallel, though.
If I use two of the low-voltage displays designed for rpi, I can power both of them off MT3608 running 6vdc and then 3.7vdc from battery to the rpi. Only issue here is that the display requires a driver board for NTSC output that is hard to come by.
The more I research this, the more I wonder if it would be possible to output the display output over the GPIO pins. If so, it would make more sense imo to have the controls overlay the display output (the way a typical TV menu overlays the TV picture). I am out of my depth here though, so I understand this is a complete deviation from the original vision for the recurBOY, and also that this may not be feasible at all given HW/SW constraints of the rpi.
Current status… things are looking hopeful. As of now, I just wanted to make sure the components would fit around the drill holes from the pre-existing gameboy PCB. Still need to draw the traces but before I do that, want to change some hardware first.
For example, I want to switch the potentiometers and have them facing out the sides of the gameboy housing. Was also going to change the rca and cv inputs to be plugged into the top of the case. May also want to change the size of the screen but not sure what that would entail. Ultimately, I would love to have the buttons be the same type buttons for the gameboy, but right now I am just trying to build something that works! I think it will take a couple of iterations, but at least I know it might be possible.
Hardware has been updated, all vertical jacks are now horizontal. Everything is still looking good just need to draw the traces. Was wondering if @cyberboy666 you have any advice for the traces, specifically curious about this one I’ve highlighted in yellow:
I feel like the mantra to this website is, giving easy access to affordable visual tools to those who need them. I would like to use a gameboy shell as a case because they are cheap to purchase and easily accessible. From what I am reading on the internet, it seems possible to power a Raspberry PI Zero with 4 AA batteries. Would just need to add something like a buck convertor:
If that doesn’t work, was thinking about creating a modified 3d printed version of the gameboy case that would be able to house the battery pack that @homegrown is conceptualizing. One day at time, I’ll work more on this project next week.
regarding that weird trace - its the data_line between the pi0 and tft screen…
i was finding that some of the (aliexpress) tft screens i got would work fine when i connected them to pi with wires, but didnt work when connected on the pcb. dont really know why but narrowed it down to this particular trace. so made it a bit thicker/longer and everything iv tested on this version of the board works soo
could just be a weird out of spec batch from the factory or maybe interference somewhere on the board idk haha
PCBs are in! I need to make 5 or 6 drill holes bigger… The board also needs to be a few millimeters taller. I didn’t think I would get it right the first time but we’re pretty close! Right now I am more concerned with all the electrics working, either than that things are looking good.
Parts have been ordered, waiting for them to arrive… keeping my fingers crossed that all goes well. I was curious to whether there would be enough room for the Raspberry Pi Zero to fit and it looks like it will!
Ordered some original recurboy PCBs just for fun. If you need one, I don’t mind mailing a few out. The PCBs designed for gameboy I won’t give out until I make some corrections.
Talking with my friends discussing lowest pricing, I agree for now 3D printed shells are the most viable option. Working with the gameboy shell, there would have to be some modifications that would require a drill and also a screen resizing.
@homegrown let me know what your battery design is looking like I think it might be great for a 3D printed build.
I still want to brainstorm and work on a recurboy design that would fit in a gameboy shell but I know that it is going to take time and I want to help create something easy that other people can build now, I have a friend with a 3D printer and I think we can put together some stl files that could house homegrown’s battery design
I also want to add a AC or DC powered option, but that is for a later design.