Multi-Purpose Touch Screen DIY Project - OctoDash Application

Build a mobile OctoDash setup using a DIY touchscreen assembly and a Raspberry Pi 4 that can provide almost any 3d printer wireless print uploads and many upgraded features.

Click here to see the parts list

Multi-Purpose Touch Screen DIY Project - Octodash Head Unit

 

Before starting please know that the majority of this project has already been covered in creating the display unit below.



 
 

Tools Used


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MFR PART # 32305
DIGIKEY PART # 1742-32305-ND
MANUFACTURER Klein Tools, Inc.
DESCRIPTION Hex Socket, Phillips, Slotted, Square, Torq-Set® Bit, Screwdriver Set
DATASHEET Click Here

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MFR PART # 53104
DIGIKEY PART # 53104-ND
MANUFACTURER Klein Tools, Inc.
DESCRIPTION HIGH-SPEED DRILL BIT - 1/8’’ BIT
DATASHEET Click Here

 
 
 

Electronic Components Used


The only difference between the models below is memory size and price. I used the 8GB RAM version, which is unnecessary for the application. Any of these will work.

RASPBERRY PI 4 B

DK Part Number MFR Part Number Memory
2648-SC0192(9)-ND SC0192(9) 1GB
2648-SC0193(9)-ND SC0193(9) 2GB
2648-SC0194(9)-ND SC0194(9) 4GB
2648-SC0195(9)-ND SC0195(9) 8GB

 
 
 

I have noticed that with consistent use and long prints, this board does get a little hotter than I would like so I put this fan/heatsink kit on it. That is no longer an issue; I believe it is money well spent and will be rewarded in longevity.


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MFR PART # 114992661
DIGIKEY PART # 1597-114992661-ND
MANUFACTURER Seeed Technology Co., Ltd
DESCRIPTION Heat Sink Raspberry Pi 4B Top Mount
DATASHEET Click Here

 
 

VIDEO CONNECTION

The Raspberry Pi 4B utilizes a micro HDMI video Jack. The Seeed 7" Touch screen utilizes a full size HDMI video Jack. While it is true that a cable can be purchased that will connect these two devices I find that they usually stick out a lot further than I would like. The three parts below create a cleaner, low profile look in my opinion.

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MFR PART # 3549 3561 3557
DIGIKEY PART # 1528-2363-ND 1528-2375-ND 1528-2371-ND
MANUFACTURER Adafruit Industries LLC Adafruit Industries LLC Adafruit Industries LLC
DESCRIPTION DIY HDMI Adapter Board
Position Ribbon Cable 7.874
(200.00mm)
DIY HDMI Adapter Board
DATASHEET Click Here Click Here Click Here