Compared to DIY prototype cartridges, new Flash cartridges will be smaller and thinner.
If signal lines appear on the opposite side of the board, a stackable cartridge will be realized.
(If it’s a small cartridge stack it will not be unrealistic)
Or it may be better to place a small universal board adjacent to the flash board instead of the pin header and make it a DIY area.
It may be a good idea to change the angle of the pin header so that the backpack or daughterboard (universal board=DIY area) can be installed.
That small cart looks awesome I also like the idea of a through connector at the back. I’m not sure about the version with a connector at the bottom though. Using a right angled connector will increase height.
I can look at your cart designs for a long time
I’ve pretty much finished the design for the cart PCB. just need a few minor tweaks. I made a print out to see how it would look on Arduboy.
I am curious about the stackable flash unit … what pins are available for the second item? What sort of items could you make with those pins? Are the pins used by the flash cartridge itself only used when actually flashing a game or are they unavailable always??
Flash is for the moment only used for flashing games. So the cart doesn’t need to be in all the time (unless the game makes use of the flash ofcourse)
All pins on the extension would be the same on the other end (full pass through) for flexibility. To disable the flash several schemes could be used depending on which pins you would want to use (keep chip select inactive, keep clock at fixed state or keep data all the time low)
I feel so totally spoiled now with the custom bootloader built in flasher menu finished and being able to change games under two seconds.
After using the Left+Up+A+B to get back to the bootloader flasher menu for a while. I realized the reset line is at the expansion connector too. so I’ll do a redesign with a more user friendly reset button on the flashcart. Thinking about a right angled smd type pushbutton.
Yes! (combo is compiled in the sketches core) a reset button will be optional for the cart. I want to add it to the design (I just got the idea this afternoon) A homemade Arduboy will most likely already have a reset button or could be easily added. Maybe a reset button could also be added to the backplate.
Cool! Looking forward to see the result. If you can handle very tiny soldering. You may want to get a flash chip in WSON package. the height is much lower then the SOP package I’m using in my prototype.
Nice hack. I’ve changed the PCB design and added tactile button on the back of the PCB so effectively it will also be at the top side and at the left like yours. Initially I wanted to add a right angled one but it would increase the size and height of the total design.
Bottom Layer (mirrored view)
I’ve put the Eagle project up on GitHub.
I used one of these buttons in the design (button height still to be determined)
Oh!! The design of the board is being determined.
So, for example, I considered the shape of the cartridge when considering thin buttons (ALPS SKQGAAE010 and SKQGABE010).
Perhaps it would be like that…
That looks awesome! you’re very good at this CAD stuff
I was thinking of using that raised version (SKQGABE010) with the stem poking through a hole in the case. But I like your idea using the case as part of the button better. Using that SKQGAAE010 button requirres even less height! I’ll see if it fits the rev1.1 PCB version
That look REALLY NEAT. can’t wait.
Erm … make sure that the plugs are not loose (have them not be individual ones)
Can it be gold-plated too? (I personally have like…200 of gold-plated headers and plugs in my storage), those things aren’t that expensive.
BUT, 7.2mm is even thicker than the Arduboy we had right now…(or am I looking at the wrong number?)
you can just have the button’s metal thing to stick out of the case (to reduce thickness by…maybe 1.5mm)