This computer inspired by the model created by N.O.D.E is made on a raspberry pi zero. It is designed with the idea of programming, playing simple games, running some scripts away from home.
First of all, I'd like to thank N-O-D-E for the inspiration.
Attached is the video that inspired me: https://youtu.be/SO4amBc0Tbw
Because there were no files explaining how to make this device, I have created a version of my own, following the lines of N-O-D-E, but with some modifications. I have also created the appropriate stl to be able to print it in 3d.
The dimensions of my devices are 127.3 mm x 115.5 mm x 16.5mm
I'll make a document where I'll explain in detail how it's done. However, due to the time it will take me to finish it, I'm going to write here some notes to guide people to do it.
In the near future, I will improve this device by adding a raspberry pi 3 a+ (or 4 a+ if it comes out on time).
For the correct assembly it is necessary exactly the same component that I am going to put here:
I recommend configuring the raspberry before mounting. To do this you need to install :https://github.com/goodtft/LCD-show. The commands have to be put from the terminal of the raspberry pi.
To see the screen, you need to write:
To retransmit by hdmi:
I also recommend pairing the bluetooth keyboard before installing it, since it is difficult to press the sync button afterwards.
Prepare the assembly:
It is necessary to desolder the GPIO of the 3.5 inch screen.
You need to cut in half the JTS connector to fit (if you are going to use the port, be careful with the polarity).
The keyboard must be dismantled. Also, the battery soldered to it must be removed.
The cable that I used for the assembly of the circuits was 0.22mm^2. If it can be thinner, maybe better, but it was enough for me.
Notes of the assembly:
The nuts are glued in the corresponding holes (5 in the back and 1 in the front). It is made to fit perfectly. The glue I used is Super-Glue. Pour it first to the surface of the printed piece, avoiding that the glue covers the hole.
The pieces like the keyboard, I glued them with silicone. Once the cables were welded from the GPIO raspberry to the GPIO of the screen, I secured them with silicone to prevent them from being disconnected with inappropriate movements.
The battery can be glued with double-sided tape, but not with silicone because high temperatures can damage it.
The pins to be soldered between the raspberry plate and the LCD are 11 19 21 23 25 (GND); 2 (5V) 18 22 24 26. (same on both). Note that on the screen the square pin is pin 1 and the top pin 2.
I leave the circuit diagram in an image. I hope it's clear enough If it looks bad, I uploaded a pdf
To add the additional usb you must follow another scheme also added as a photograph (The raspberry is face down)
You have to be careful with the POWERBOOST 1000C because, when you charge it with a charger of more than 1A, it overheats a lot until it melts the PLA. To solve this problem, I recommend buying a more thermoresistant PLA or charging it with an intensity of 0.2-0.4 Amps (with a suitable charger or in places with low amperage as the usb of the PC). The option to charge it with less intensity will make it take a long time to charge it. In future versions I will consider the use of PowerBoost 500.
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