20220717 TR-595E: The LCD Screen

20220717 TR-595E: The LCD Screen

I forgot to take a look at the LCD screen which arrived two weeks ago. The 2.2inch 18-bit LCD screen used in the TR-595E is a 320×240 TFT with a microSD card. Unfortunately, it is also out of stock at Adafruit. When it comes to electronics, I have challenges in sound, LCD screen, motors, and optical encoders. So, in this section, I hope that I would be able to get the screen working.

This screen can be controlled by a Raspberry Pi PICO (on its way) through what I supposed would be SPI communications. Also, you are going to need an Arduino UNO to program the Raspberry. Lukily I have one (played and then KIV-ed it) stashed away which I hope it is still working.

My only solution , is to get the screen from an alternative source and looking the the picture (below) from Adafuit, some of the wiring is a little worrying. Ha ha ha.

Where are all these connections (on the left) going?
All I know, based on the labels, this is a SPI LCD screen.
This is the one I got and some of the pin will have to be re-arranged and soldered directly to the Raspberry Pi PICO.

THE ALTERNATIVE SCREEN

Well, what do you know? The screen I got for was quite reasonable but it is a little harder to find. Maybe one day, when I know more about Arduino programming, I might be able to make my own animation screen.

So, this is the closest screen I can get from an Alternative seller.
Don’t worry about the scratches as it is only on the protective plastic.

READJUSTING THE LCD SCREEN

On the first try, the screen cannot fit into the body because of the tall connector pins. The position of the screen also means that one edge of the orange circuit board is hitting the body’s inner wall. The only safe solution would be to see how I can re-adjust the LCD screen.

Peeking a little, I saw what was essentially some very thin double-sded tapes. I poured a few drops of Zippo lighter fluid into the gaps and waited for a few minutes.
After a few minutes, the Zippo has done its job so I slid a thin metal ruler to try to pry the screen off. Suddenly, I head a crack but luckily, it was the metal casing which bent and popped off the screen.
If you are doing the same, please do be aware that you can only slide the thin ruler in ONE WAY. The other way is blocked by the thin flex cable. (dotted rectangle).
The screen is out and now, I can re-align it to fit into the body.
20220717 TR-595E: The LCD Screen
The weakened double-sided tape allowed me to reposition the LCD screen inside the 3D printed casing.
I hope the LCD screen is in the correct position because the microSD card reader could be in the way. I might also want to remove the connector pins too as they can prevent the cover from closing properly..

AND NOW, FOR THE TADA… AND SO, TA-DAA!

The LCD screen fits but there is a noticeable gap of about 4mm on the left. I will need to come up with a solution for this later on

THE ADAFRUIT LCD SCREEN LINK

Here is the Link: https://www.adafruit.com/product/1480

Posted in 3D Printing, A Piscean Works Blog, Electronics, Programming, Star Trek, TR-595E, Tricorder.

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