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Forum Index : Microcontroller and PC projects : controlling 6 LCD displays with 1 PicoMite

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mozzie
Senior Member

Joined: 15/06/2020
Location: Australia
Posts: 205
Posted: 01:57pm 22 Feb 2026
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G'day Gerald,
A novel approach and a brilliant looking setup.

You might like to try cutting up the grey anti-static bag into strips as a filter for the WS2812 LEDs, several layers may be required. Works very well on overly bright power LEDs on all sorts of things here  

Regards,
Lyle.
 
ville56
Guru

Joined: 08/06/2022
Location: Austria
Posts: 411
Posted: 04:58pm 22 Feb 2026
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Thanks for the tip Lyle. Will give it a try. Should have some of the bags somewhere.
                                                                 
73 de OE1HGA, Gerald
 
ville56
Guru

Joined: 08/06/2022
Location: Austria
Posts: 411
Posted: 03:34pm 23 Feb 2026
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attached is the circuit diagram for the display unit as I've built it.



the signal names partial buried under the watermark are:

GND    Ground
Vcc    5V
SCL    serial clock
SDA    serial data
RS     reset
D/C    data/command
CS     chip select
BLK    backlight control

I left RS bus wire floating without any issues so far, it must not (sic !) be connected to the pico if the standard MMBasic "gui reset lcdpanel" init is used for each LCD position. I'am currently reading thru the ST7789 datasheet to find out how to init the displays with poke display commands. Should be a lot faster and seems to be feasable.

For the colons the LED and the WS2812B are interchangeable in my design.

On the software side I still have to do a lot of improvements, so I will post the code in a few days at the earliest. I have a lot of grandpa duties as well    and a doughter-in-law in the wheelchair ....
                                                                 
73 de OE1HGA, Gerald
 
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