I'm working on a plugin for ledspicer that will use the rpi GPIO pins, that means that if you are not using the GPIO port and want to hook some leds there that will be cheap and cool! I will post more details when I get a working version.
As mitu mentioned you can use a led controller board to get the same (an a lot more) effects using ledspicer.
Hello, we recently identified a bug in the ControlBlock driver. I am very sorry for that!
Your observations see to match the symptoms caused by that. We released an update yesterday and that should also fix your problems.
I was kind of giving up hope I would get my Howler working on my Pi3. Is there a retro pi image that I can download that will have everything set up? I'm really new to all of this, and I'm also dyslexic so the amount of reading I have to do is pretty daunting.
I'd love to find an image I can just put on my SD card and start going.
Finally got the switch yesterday and installed. eBay listing said it was a latching switch but it ended up being a momentary. I wasn't able to put the switch on the side like I wanted since it was too long and wide and would interfere with the GPIO pins.
This was really the only place I could put it.
I have the led ring setup to be on when the pi is on and off when power is off.
For anyone installing an led on their Pi 3+, I found that pin 8 (GPIO 14) used for power is set to low(power off) by default on newer versions of the OS, I'm on Linux 9 stretch from the image I got with 4.4.1. To enable it you need to add the following line to /boot/config.txt
@clyde Thank you! That worked perfectly. I added "sudo python /home/pi/caseled/galaxy.py &" in before emulationstation and it boots up like a charm pre loaded with the settings I edited the script for the LED's.
If the script doesn't need administrative rights, you can omit the sudo before the command. It adds a tiny yet easily done bit of security to your system.
I'm using a Pac-Drive from Ultimarc for my LED buttons. @savetheclocktowr made a controller software for some nice sequencing effects. It's not needed for permanent lighting, the Pac-Drive will do that out-of-the-box in Retropie.
@psychosious You can also try to connect to 3.3 rail directly!
This might work for a status LED (on/off/error). If you want to use it for illumination effect the 3.3V can be a bit low.
Usually the forward current for blue LEDs are 2.9-3.1V
Keep in mind, the 3.3V rail delievers only 100mA!
That's enough for a few microcontrollers and a bunch of LEDs - not enough for your XMas tree!
@jkacza Sorry to say but i lost the scripts a while ago. Did a fresh install of RetroPie and forgot to back them up. Didnt bother to rewrite them as i moved the pi to a flirc case and there isnt much room and useful mounting points for a led.