Back in my programming days, in the 90s, I started with Turbo Pascal and later switched to the now legendary Borland Pascal with Objects. So, when I’ve got my hands on Arduino, I searched for some Pascal IDE for it but found only some half-finished-and-already-dead open-source project. Not a big [Read More]
Well, I made it. 16 RGB LEDs on an Arduino, no LED driver used, just a single CD74HC238 demultiplexer. This is certainly NOT the way to drive LEDs, the Arduino here is basically just turned into a programmable LED driver that can’t do much else, but this was an interesting [Read More]
The holidays are finally drifting towards the end, so it’s time to start doing some stuff. I’m slowly preparing a couple of instructables dealing with multiplexing. The first one will cover the basics and provide an example using Arduino only; the second one will deal with creating big matrices with [Read More]
Achieved a 8×8 RGB matrix run by a single DM633 chip at good and healthy refresh rate of 122Hz. Which makes it possible to start designing new boards. Everyone loves video, so here it is, and then some explanations. (some flickering seen here is due to camera speed, it’s not [Read More]
Just to gather my thoughts, a bit of info regarding the DM633 and DM634 multiplexing. Some time ago I’ve made an experimental board with a 8×8 RGB LED matrix. It was designed to be controlled by either one DM63x LED driving chip (16×4 mode) or two (8×8 mode). In the first [Read More]
The Mx board below is indeed a multiplexing experiment. As the documentation of DM63x line of chips is pretty scarce, I have to find the right solution by trial and error. The photo shows a 8×8 RGB matrix being run by a single DM633 (plus a couple of SN74HC138Ns). The [Read More]
Stencils are finally here, good. Well, in fact they’re here like for months now, but I didn’t post this up until today. Stencils are a good thing, really. And an old credit card is the best for spreading solder paste.
I know I must finish this site at least in it’s alpha form, but it’s really boring. So spent all the free time today on a new board. Worryingly, I have no first-hand experience with the chips it is based on, only datasheets. Still, it’s designed. Think I’ll send it [Read More]
The second fight with the wordpress has started. Hope it won’t end up like the first attempt. Hooray!