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    Yet Another Pi Zero Portable!!

    Scheduled Pinned Locked Moved Projects and Themes
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    • mooseprM
      moosepr
      last edited by

      DAMIT!

      Hello

      The 2.8 LCD selected by you is not supported in fbtft.
      If you want us to do PCB similar to your selection than we can offer you 2 options
      100usd development charges
      Or
      Moq. 25 quantity
      One more economical option is we can supply raspberry pi LCD without 40 pin header and than you do the wiring on the gpio header pads
      Regards
      Tinylcd

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

      1 Reply Last reply Reply Quote 0
      • mooseprM
        moosepr
        last edited by

        Right!! i have a plan. I have been doing some digging and the ili9341 screens are actually all the same!! there are 2 variations, the larger have touch, and the smaller dont, the first 14 pins are the same regardless of the presence of touch. So all i need to do, is buy a naked 2.8" screen, and unsolder the 2.2" screen i currently have, and transplant the 2.8" screen on top!! that way the pcb is actually the same size, if not smaller than the screen, and there is more space to play with!!

        now to wait for the good ship chinapost :D

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

        senkunS 1 Reply Last reply Reply Quote 0
        • ParzivalP
          Parzival @moosepr
          last edited by

          @moosepr this is so cool. where do you get the controllers/buttons from. I would like to build my own.

          1 Reply Last reply Reply Quote 0
          • mooseprM
            moosepr
            last edited by

            @Parzival i did some hunting, didint want the usual 'clicky' tactile switches that are commonly used. I found a guy on ebay that sells all kinds of switches for the repair of keyfobs and the like

            http://www.ebay.co.uk/itm/321411385630

            the ones i got are the OMTEN D3. They are really nice, will be great behind some actual buttons, will give that retro feel of the rubber domes

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

            1 Reply Last reply Reply Quote 0
            • T
              thedudester80
              last edited by

              That is a cool portable. I like the battery body idea. Must be really thin and light. Good work .

              Mint Boy, Case Arcade, New Projects Coming soon....

              1 Reply Last reply Reply Quote 0
              • mooseprM
                moosepr
                last edited by

                Yeah it's just a shade thicker than a sharpie, and only 105 grams, so it's pretty skinny

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

                1 Reply Last reply Reply Quote 0
                • senkunS
                  senkun @moosepr
                  last edited by

                  @moosepr said in Yet Another Pi Zero Portable!!:

                  Right!! i have a plan. I have been doing some digging and the ili9341 screens are actually all the same!! there are 2 variations, the larger have touch, and the smaller dont, the first 14 pins are the same regardless of the presence of touch. So all i need to do, is buy a naked 2.8" screen, and unsolder the 2.2" screen i currently have, and transplant the 2.8" screen on top!! that way the pcb is actually the same size, if not smaller than the screen, and there is more space to play with!!

                  now to wait for the good ship chinapost :D

                  hey. Just wondering how's it going with your project? Did you get the the transplant done? And, what are you using for audio? Just noticed that you have no audio out in your build.

                  mooseprM 1 Reply Last reply Reply Quote 0
                  • mooseprM
                    moosepr @senkun
                    last edited by

                    @senkun

                    Hey man

                    Well I technically have all the bits, just need to iron out a few bits.

                    My plan with transplanting a 2.8 screen onto a 2.2 board didn't work. The distance from solder connector to screen edge is the same for all screens, so it gave me no benefit. I'm just trying to knock up a little PCB that will allow me to connect the screen with minimal board.

                    As for the sound, I'm planning on using an adafruit digital audio board https://www.adafruit.com/products/3006 which will give me mono sound for the speaker, or maybe even switchable to the headphones. That would then leave me with a hole where the volume knob should be.

                    The problem I have now, is once I have got my PCB designed it's going to be another 2 weeks at least. Although I will end up with some spares I could distribute.

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

                    T senkunS 2 Replies Last reply Reply Quote 0
                    • T
                      thedudester80 @moosepr
                      last edited by

                      @moosepr That I2S amp works great with the pi zero. I used it for my altoid project. Really simple to setup as well.

                      Mint Boy, Case Arcade, New Projects Coming soon....

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

                        @moosepr - I wish that I2S audio amp was available when I built the NeoPiGamer. I'm definitely going to use it in my next pi zero build. Great find!!! Looking forward to your completed build.

                        1 Reply Last reply Reply Quote 0
                        • mooseprM
                          moosepr
                          last edited by

                          yeah that little amp is ideal. Shame its only mono. You can get stereo versions but they are a little larger (although looking at this, it doesnt have much 'amp' in there) https://shop.pimoroni.com/collections/pi-zero/products/phat-dac

                          The only issue i have, is the I2S board needs pin 18, which is currently what my ili9341 screen uses for its backlight

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

                          1 Reply Last reply Reply Quote 0
                          • senkunS
                            senkun @moosepr
                            last edited by

                            @moosepr said in Yet Another Pi Zero Portable!!:

                            The distance from solder connector to screen edge is the same for all screens, so it gave me no benefit.

                            alt text

                            http://www.aliexpress.com/item/2-8-inch-TFT-LCD-screen-display-ILI9341-40-pin-plug-in-type-support-8-16/32627803416.html

                            How bout this one?

                            mooseprM 1 Reply Last reply Reply Quote 0
                            • mooseprM
                              moosepr @senkun
                              last edited by

                              @senkun

                              That would technically work, the board I currently have is only 14 pin. It's the pure SPI interface, where as the 40 pin ones have raw pixel pins bundled.

                              I'm currently trying to design a board that has a 14 pin ribbon connector on one edge, and 8 pins of SPI on the other. Literally a bare minimum.

                              You could technically solder wires direct from the screen ribbon to the pi with nothing in the middle, but the 0 8mm pitch ffc connector doesn't lend itself to hand soldering

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

                              senkunS 1 Reply Last reply Reply Quote 0
                              • senkunS
                                senkun @moosepr
                                last edited by

                                @moosepr

                                I must've been blind not only did not read where it said 40-pin, didn't even see how fine the pitch is. Took one look at the length of the ribbon and thought hey we could drop this on the 2.2" controller board...

                                btw, are you using the pitft22 dt overlay to enable your screen? Can I have your tft to zer0 pinouts for reference?

                                mooseprM 1 Reply Last reply Reply Quote 0
                                • mooseprM
                                  moosepr @senkun
                                  last edited by

                                  @senkun

                                  its easy done. there are so many screens and variations of them, its a minefield!!

                                  I used the information from here
                                  http://marcosgildavid.blogspot.co.uk/2014/02/getting-ili9341-spi-screen-working-on.html

                                  then used a little reference image to trace things

                                  https://www.element14.com/community/servlet/JiveServlet/previewBody/73950-102-10-339300/pi3_gpio.png

                                  I was managing to get the thing working with the command

                                  sudo modprobe fbtft_device pitft22 (i think, im working from memory here)

                                  then i could mirror the terminal by typing

                                  con2fbmap 1 1

                                  but i was struggling to get things to activate at boot. Doing a bit of googling, i managed to find a video on youtube that had the solution to my problem. The problem is now, i am unable to find the video :( I will have to ssh onto my zero and use the command history and see how i fixed it

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

                                  1 Reply Last reply Reply Quote 0
                                  • mooseprM
                                    moosepr
                                    last edited by

                                    so now i may also be able to add PCB design to my skillset

                                    https://oshpark.com/shared_projects/BP9tGKag

                                    in theory you can solder a 2.2" ili9341 screen direct to that board, then add wires from there to the pi

                                    the 2.4" and 2.8" screens have an extra 4 pins on the connector, but thats just for the touch, so they could just be snipped off the ribbon (hopefully)

                                    The resister on there is just for the backlight, you can change it to alter the backlight brightness, and it means there is one less pin needed from the pi (so i can use pin#18 for audio)

                                    its the first PCB i have designed, so it may not be perfect, and it is untested, so it could burst int flames, who knows!!

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

                                    senkunS 1 Reply Last reply Reply Quote 0
                                    • senkunS
                                      senkun @moosepr
                                      last edited by senkun

                                      @moosepr said in Yet Another Pi Zero Portable!!:

                                      sudo modprobe fbtft_device pitft22

                                      Ah thanks. That's already in the latest kernels, so it can be enabled by adding to config.txt;
                                      dtparam=spi=on
                                      dtoverlay=pitft22

                                      in theory you can solder a 2.2" ili9341 screen direct to that board, then add wires from there to the pi

                                      Haha. Nice little board. But wait! We can ditch the original red pcb and just solder screen ribbon wired direct to the zer0's gpios?

                                      Here is the 2.2" tft without touch screen, just the 9 pins but there's that cap and resistor plus u1, q1, j1 which is not needed?

                                      edit: seems like u1 is a 65z5 +voltage regulator chip which doesn't seem to be present on the 14 pin touch versions.

                                      alt text

                                      mooseprM 1 Reply Last reply Reply Quote 0
                                      • mooseprM
                                        moosepr @senkun
                                        last edited by

                                        @senkun yeah my board might be a little too minimal, but it's only costing me $2.20 for 3, so it's worth a punt. The only down side is the wait.

                                        If it does work, I'm planning on making a custom board that will will link it all together into one. 2.2 screen on the front, some buttons on the button in a DMG-01 layout.

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

                                        senkunS 1 Reply Last reply Reply Quote 0
                                        • senkunS
                                          senkun @moosepr
                                          last edited by senkun

                                          @moosepr said in Yet Another Pi Zero Portable!!:

                                          @senkun yeah my board might be a little too minimal, but it's only costing me $2.20 for 3, so it's worth a punt. The only down side is the wait.

                                          If it does work, I'm planning on making a custom board that will will link it all together into one. 2.2 screen on the front, some buttons on the button in a DMG-01 layout.

                                          Apparently these screens will not work unless they're getting a strict 3.3V hence that 65Z5 regulator on board.

                                          I'd say you need to regulate power to it somehow. Take it from the Zer0's 3.3V? You've ordered the boards so it'd be interesting to see if and how well it tolerates fluctuating power directly off a Lipo (from 4.2V max ~ 3V safe cutoff).

                                          While the Zer0 can and has been tested to boot from as low as 2.8V (very unsafe if Lipo) and run unless there are 5v usb peripherals. But you have that charger/protector module (I think that cuts at 3.2V) and you've tested it running from just the Lipo with memory sticks and wi-fi dongle. So everything should still work if the screen is tolerant.

                                          mooseprM senkunS 2 Replies Last reply Reply Quote 0
                                          • mooseprM
                                            moosepr @senkun
                                            last edited by

                                            @senkun
                                            I am running my screen from the 3.3v line on my zero anyway, so I'm assuming everything will be OK without regulation.

                                            Your brave ordering my boards! I couldn't find a proper connector in fritzing so i had to hand build one from the normal pads. There are some things quite close together, so it will need to be tested for shorts.

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

                                            senkunS 1 Reply Last reply Reply Quote 0
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