3D printed parts (at least those made on a RepRap) have obvious layers and paths on all the surfaces, this can ruin the look of some of the more artistic parts. If the part is made from ABS you can actually use … Continue reading
I use a 3D printer for some of my hacking, the model I have is a Prusa i2. Seen to the right it’s a RepRap Mendel derivative, I built it myself having sourced all the parts which is actually a … Continue reading
I’ve made some reasonably permanent hardware now, first my schematic: Kickad files are on github. The connector on the right is the LED string. The T2 and T3 connectors allow me to use the launchpad to program the microcontroller on … Continue reading
Start with a video again, I’ve written more patterns, it looks like Christmas lights do now and is ready for a tree. It turns out I can bash out patterns really quickly, no one has taken longer than half an … Continue reading
I’m excited about this update, aside from a few bugs I’ll fix later, the groundwork is all done, all I have left to do is write the patterns. But first things first, a video, I talk in this one and … Continue reading
I got a lot of work done on the lights today. I finally implemented the lookup table fading, which is gracefully working on all colours, not just primary colours. It turns out the hardest part of this was making the … Continue reading
Less stuff this time. I’ve had a stab at getting the fading sorted but I’m not there. Instead I did a bit more work on getting the interrupt driven code in place, and it’s working quite well now, I’ve managed … Continue reading
So I started messing around with different colour formats and way’s to fade LEDs gracefully yesterday. I’ve not set up the timer yet so I just used a loop with a big counter in it for now. Be warned, this … Continue reading
So choosing 56K pull-ups at random was a spot of luck, it’s over spec for the uC but under spec for the string. :-S 68K probably won’t work, or have SI issues, 47K will probably damage the first LED Pixel. … Continue reading
Incandescent lamps are bad, we know this to be true. Yet all the LED Christmas tree lights I’ve ever seen are terrible for one reason or another: Only one colour. Only one channel. Noticeable flicker on fade. I always wanted … Continue reading
