[sdiy] Fast lcd display like digitakt

Roman Sowa modular at go2.pl
Wed Jun 19 09:56:53 CEST 2024


I was thinking about multiple displays for quite long, and everytime I 
came to the conclusion that the easiest way is to just attach a small 
microcontroller to every small display. This way all of them can be 
updated at once and also it's easier to handle EMI without half meter 
long traces transmitting 20MHz square waves. It could be done with LVDS 
buffers but then again it allso adds to the cost, not much less than a 
single micro.
It makes more sense though to control 4 to 6 displays from single 
microcontroller on a single, not too big PCB.

Here are 50 displays, each with its own micro, whole bunch driven by 
single SPI-like bus where only text is sent, so it was less than 2kB of 
data sent to display this:
https://youtu.be/izg9OtOUhsw?feature=shared

While this is only text, nothing can stop me (except lazyness) from 
displaying virtual pots based on just one byte of value transmitted.

Roman


W dniu 2024-06-19 o 05:48, brianw pisze:
> Easy! Just connect 27 of them! One per virtual knob.
> 
> I'm only slightly kidding. It's actually a challenge to design a circuit with that many displays attached to the STM32F40x, but it might not be too difficult to connect a handful of displays.
> 
> Brian
> 
> 
> On Jun 18, 2024, at 8:41 PM, Benjamin Tremblay via Synth-diy <synth-diy at synth-diy.org> wrote:
>> Even my virtual knobs get too cramped on their virtual panel. But graphics programming is fun.
>> I need higher resolution than 320x240.
>>
>> <IMG_2100.jpeg>
>>
>> Benjamin Tremblay
> 
> 
> 
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