Gemma, LED’s and one or two coin cell batteries. Has anyone done anything really small? I got me a 3d printer, and was going to print some halloween decor, small stuff, and would like to light them with a gemma, a very small battery, and a single FastLED driven LED. But how? Does anyone have some examples of how they did this? Space is a premium, hence the choice of components. I’d rather avoid as much extra stuff as possible to fit the assembly in small decorations. I will survive replacing the battery every day or two for the few days it will be in use. I’d turn them off when not needed as well. But I’m not sure exactly how to do the HW setup to begin with. What works well? I’m game for another micro too (a BLE setup would be super cool, but I don’t want to spend a lot), but I have a few gemma’s sitting around, so that would work for me.
Ble and fastled isn’t the easiest of solutions I have found.
I would suggest maybe attiny25 / 45 and the apa106 (the classic 4 legged led) would be a small solution
Thanks, that might just work. I might be able to just use the APA106 directly with the Gemma with no boards in between, and batteries stacked underneath. Maybe a diffuser? I think this might work, I appreciate it.
Still listening for someone with a BLE solution though. That would be pretty kick a$$.
Or this one: https://learn.adafruit.com/neopixel-led-magnetic-pendant-necklace/overview. For very small stuff there are smaller boards than Gemma!