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PewPew Standalone

A Python-based micro game console, optimized for game development workshops.

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$11.99
deshipu has 260 orders / 17 reviews
Ships from Zürich, CH

A Python-based micro game console, optimized for game development workshops.

I really like the #PewPew FeatherWing as a platform for teaching game development, but the cost of Feather boards needed to use it makes it difficult to organize workshops for larger groups of people. I have previously tried to work around that problem by merging the FeatherWing with the schematic stolen from a Trinket M0 (with an additional flash memory), but the resulting design was complex, difficult to make and still a bit expensive. Now after having designed a few more CircuitPython boards I think I can really cut the costs and make a standalone device with all the functionality of the original shield, but optimized for workshops.

gerber.zip

PewPew Standalone 10.2 gerber files

Zip Archive - 181.08 kB - 09/18/2018 at 12:08

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  • Laser Cutting is Tricky

    deshipu03/19/2019 at 13:14 6 comments

    The laser-cut acrylic pieces that I planned to attach on the back of the small PewPew Standalone boards just arrived, and I have to say I didn't anticipate how they came out:

    Well, at least the shape is correct... but I didn't think the scale will be wrong. Especially since I actually printed the PDF and made a wooden model based on that, to make sure everything is good. Oh well, I guess that's it for ordering laser-cutting from China. I will have to do it myself.

  • Mailing List

    deshipu03/17/2019 at 19:28 0 comments

    As the number of users grows, it would be nice to have one central place for asking questions and general discussion. The CircuitPython discord channel is one such place, but it's not dedicated, and many people don't want to use Discord, so there is now a mailing list. The address is pewpew@python.org and you can subscribe by visiting https://mail.python.org/mailman3/lists/pewpew.python.org/.

  • PewPew Pro

    deshipu03/06/2019 at 19:24 1 comment

    I had a friend visiting a while ago, and I showed him my PewPews. He liked them, but remarked that he wouldn't mind a more feature-full version (the bi-color display, more shades, more memory) even if it meant the price would be higher. So I went ahead and designed such a version:

    It's really just re-hashing of the version 5.x of PewPew, but in the horizontal form factor pin-compatible with the version 10 of PewPew. Under the display there is the SAMD21 microcontroller, a 2MB flash memory chip (for the filesystem), and an IS31FL3733 LED driver chip.

    Read more »

  • Gamepad

    deshipu03/03/2019 at 22:59 0 comments

    Since the new firmware is considerably smaller, it has more modules enabled by default. One of those is the usb_hid module, which lets PewPew act as a Human Interface Device over USB. That means we can pretend to be a keyboard, a mouse or a gamepad. To test this, I wrote a simple program that turns PewPew into a gamepad:

    import board
    import struct
    import usb_hid
    import pew
    
    
    pew.init()
    screen = pew.Pix()
    for gamepad in usb_hid.devices:
        if gamepad.usage_page == 0x01 and gamepad.usage == 0x05:
            break
    else:
        raise RuntimeError("Gamepad HID device not found")
    report = bytearray(6)
    
    while True:
        buttons = pew.keys()
        report_buttons = 0
    
        if buttons & pew.K_O:
            screen.pixel(6, 3, 3)
            report_buttons |= 0x01
        else:
            screen.pixel(6, 3, 1)
    
        if buttons & pew.K_X:
            screen.pixel(6, 5, 3)
            report_buttons |= 0x02
        else:
            screen.pixel(6, 5, 1)
    
        if buttons & pew.K_UP:
            y = -127
            screen.pixel(2, 3, 3)
            screen.pixel(2, 5, 1)
        elif buttons & pew.K_DOWN:
            y = 127
            screen.pixel(2, 3, 1)
            screen.pixel(2, 5, 3)
        else:
            y = 0
            screen.pixel(2, 3, 1)
            screen.pixel(2, 5, 1)
    
        if buttons & pew.K_LEFT:
            x = -127
            screen.pixel(1, 4, 3)
            screen.pixel(3, 4, 1)
        elif buttons & pew.K_RIGHT:
            x = 127
            screen.pixel(1, 4, 1)
            screen.pixel(3, 4, 3)
        else:
            x = 0
            screen.pixel(1, 4, 1)
            screen.pixel(3, 4, 1)
    
        struct.pack_into('<Hbbbb', report, 0, report_buttons, x, y, 0, 0)
        gamepad.send_report(report)
        pew.show(screen)
        pew.tick(1/12)

    That's it. And it seems to be working! 

  • CircuitPython 4.0

    deshipu03/01/2019 at 16:08 1 comment

    It's been quiet here for a while, but that is not because nothing was happening — on the contrary, it's because I have been busy with non-technical parts of this project. I spoke with several organizations and individuals who are interested in teaching using this device, and I had a talk at FOSDEM about it:

    Right now I'm working on a secret project related to it — I will let you know as soon as I am allowed to.

    In other news, I was putting off getting all the code cleaned up and organized, and finally yesterday evening I have bitten the bullet, so to speak, and upgraded the code to the current master of CircuitPython, and submitted a pull request upstream: https://github.com/adafruit/circuitpython/pull/1607 — hopefully it will get included in the 4.0 release that is coming soon.

    I still plan to split the current repository into small individual subrepositories, so that it's easier to find the code you need, and easier to contribute.

  • Small Version Available on Tindie

    deshipu10/21/2018 at 18:45 1 comment

    The small PewPew has been just approved on Tindie, so you can order it already. The package will arrive tomorrow, but the approval process takes some time, so I started earlier. I wouldn't be able to send it on a Sunday anyways.

    If you need a larger quantity for a workshop, contact me directly, and we can arrange it.

    The product on Tindie still has the photos of the prototype — the final version has a red PCB and green buttons. I will update the photos when the package arrives. The final price is also a little bit higher than I initially anticipated, due to the duty tax.

  • Big Version Assembled

    deshipu10/18/2018 at 15:59 0 comments

    The PCBs finally arrived from @Elecrow, so I assembled one to see how it works:

    Generally I'm pretty happy with it, there are however two small things that I would correct in the next version:

    • the direction buttons are too close to the matrix, and it's awkward to press the right button,
    • the holes for the matrix are a bit too far apart, so you have to bend the matrix legs a bit to fit, but it also makes them fit tighter, so I'm not sure about this one.

    Otherwise it looks and works great, and I think I'm going to put some of them for sale on Tindie. Here's how they look like under the hood (while being programmed):

    And here's photo of the back. There is plenty of room for a conference logo and/or name — hint, hint!

  • First Production Unit

    deshipu10/11/2018 at 09:35 0 comments

    I just got a photo from @Elecrow of the first unit they produced (a prototype to test the process). The mass production should commence shortly.

    As you can see, I have chosen slightly more lively colors than in the prototype: the switches are green and the PCB is red. Otherwise it's all the same. The LED matrix and the battery holder will come separately, to be soldered by the user.

  • Big Version PCB

    deshipu09/28/2018 at 08:33 3 comments

    I resisted for a long time, but when three more color versions of the big 60x60mm LED matrix arrived, I gave up and designed a PCB for them. You might recall that I already experimented with them before, a few logs ago, just connecting them with wires. Now I prepared a proper PCB:

    I switched to silicon buttons, like in the #µGame, and a bigger through-hole power switch. Also, the battery holder is now on the front side (so the whole thing is thinner) and uses inline configuration of the batteries. There are also two prototyping areas on the sides, and two large holes for a lanyard if you wanted to use it as a badge of some sort. The back side is clear (except for the prototyping areas, of course).

    I ordered the PCBs from @Elecrow this time, and they have already fabricated and sent it to me, now I'm just waiting for it to reach me:

  • Extensive User Testing

    deshipu09/17/2018 at 19:15 1 comment

    I took a few PewPew prototypes to the Maker Faire Zürich, to show them off but also to have them tested by the actual target audience. I think they were a success, because we always had a couple of kids at our table playing them, even though the game selection wasn't that good (mostly snake, some tetris). But I got to see how people handle them, to test how long they last on battery power (around 14 hours on two AAA batteries) and, last but not least, they went through a crash course of actually being used by a lot of living humans. I'm happy to report that there were no injuries or defects on either side.

    (Sorry for the silly face on the photo.)

    In the worse news, I finally didn't have the time to write the code to control the robot. I naively thought until the last moment that I will have some free time during the event. Nope. It was eight hours of people talking to me non-stop. Which I guess is good, because it means they were interested. But no robots. Well, I had some of my robots walking around, but not controlled with PewPew. Maybe next time.

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Discussions

titimoby wrote 09/11/2018 at 16:30 point

there's room for everyone and I'm still volunteering to translate material for micro:bit;

but I'm looking to have various pieces of hardware that I can show and use with kids.
even with your margin, it is still affordable for small organization with small sponsors.

  Are you sure? yes | no

titimoby wrote 09/11/2018 at 15:32 point

you really target under 10$ ? That means something comparable in the end to the cost of a micro:bit.

it could complete the hardware in my little kid's workshop organization.

  Are you sure? yes | no

deshipu wrote 09/11/2018 at 16:09 point

Well, that's the goal. Micro:bit is a great feat of organization and pushing through politics, and a lot of really good work by volunteers, but I feel like the device itself is a bit sub-optimal. By now I know that I can get it below $10, and I could probably go below $5 at scale.

  Are you sure? yes | no

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