Intro - why did I realize that?
The answer is so simple : just for fun :-)
A few of my main goals
- maintain access to the HDMI port;
- maintain access to the audio output;
- maintain access to the GPIO;
- maintain access to at least one USB port.
- Raspberry Pi 3
- Raspberry Pi 7" Touchscreen Display
- 3 Panel Mount Mini Slide Switch
- HDMI Panel Mount Cable F/M
- External Battery Pack PowerZen G2 9600mAh
- Audio amplifer 2 X3 W
- 40p GPIO Ribbon Cable
- USB Type A Female Socket Connector
- Audio connector
- Optical fiber
- Some wood
- Salvage pieces
Between the first try, and the end, it took me about 75 hours.
Step 1: Using Wood ...
In the cleat (9mm*38mm*2m) :
- 2 pieces with the following dimensions : 18,85 mm * 38mm
- 2 pieces with the following dimensions : 10,6 mm * 38mm
In corner wand (9mm*38mm*2m) :
- 4 pieces of 38mm height.
Step 2: It's Time to Use Tools
Here are the tools I used :
- My favorite one is the Proxxon MF70 : this THE tool that allowed me to make the cuts with great precision !!
- My Dremel (as important as the Proxxon ^^);
- A multimeter, for some tests;
- Some limes;
- And the help of my son (8 years old) :-)
Step 3: Top Side
On the top side, I wanted to get this parts accessibles :
- three swithes;
- three push buttons;
- the GPIO.
I do not give the precise details of the quotes, since it is according to your needs.
Note thoses details:
- As you can see in pictures, I used some parts of wood to hold most parts ...
- Again some wood to create the three push buttons ...
Step 4: Lateral Right Side
This side was the most complicated ...
I had to create the following holes:
- for the HP (reused from an old laptop...);
- for the USB, audio connector (reused from an old PC ...);
- the charging port;
- the HDMI port.
Step 5: Lateral Left Side
Nothing complicated on this side :
- just some holes for the HP;
- one aperture for audio amplifier;
- 5 other holes to pass the optical fiber that I use to keep an eye on the battery level ...
Step 6: It's Time to Stick ...
Nothing complicated: glue and patience :-)
Time to drink a beer!
Step 7: How to Power ...
One of the most important think was the power ...
After googling for some example, I choose to use a power bank : this model has the advantage to be able to be used while charging :
- Its capacity is done for 9600mAh, wich is enought to get at least 2 hour of autonomy;
- I have removed the case, keeping battery and charge controller;
- 5 LED indicators reveal the battery level => small parts of optical fiber allow me to see the level in front of the tablet;
- A small piece of wood is used to hold the battery.
Step 8: LCD
I choose to use the original Raspberry Pi 7" touch screen
Unlike the different tutorials, I placed Raspberry upside down to save space.
I used two metal plates to keep it in the wooden structure.
Step 9: Final Assembly
After all this work, it's time to put all these elements together
Again, patience and a bit of methodology, and everything falls into place!
For the back plate, I used a piece of plexyglass ...