The TinyLily boards arrived and they are as tiny as advertised!
I hooked one up to one of my 1 inch (25.4mm) Fibonacci128 boards to test it out and everything works! I'm ready for the 14mm Fibonacci48 prototypes to arrive.
Current draw at ~6% brightness (still plenty bright) is about 50mA. Testing for an hour used about 60mAh. That's with the TinyLily programmer hooked up (3.3V regulator, FTDI chip, etc). Should be much lower with just 48 LEDs and no programmer.
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Jason Coon (jasoncoon@leds.social)'s status on Friday, 15-Mar-2024 06:59:21 JST Jason Coon
- kaia likes this.
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Jason Coon (jasoncoon@leds.social)'s status on Friday, 15-Mar-2024 06:59:23 JST Jason Coon
Yikes. Everything looks huge in CAD. This is a laser-cut mock of the theoretical 14mm F55 next to the 25.4mm F128.
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Jason Coon (jasoncoon@leds.social)'s status on Friday, 15-Mar-2024 06:59:25 JST Jason Coon
Yes, I think this just might work. There might be just enough room to solder the two PCBs together, using tiny castellated holes on the edge of the LED PCB.
I think it'd require removing and desoldering the programming header pins from the TinyLily, or at least trimming them very flush.
Could cut/sand the castellated holes through the TinyLily PCB if you actually wanted to try using tiny screws on the edge to mount this to something. -
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Jason Coon (jasoncoon@leds.social)'s status on Friday, 15-Mar-2024 06:59:26 JST Jason Coon
I know, there's like nothing to the TinyLily except an M328P and a couple of caps that I could put directly on the back of the LED PCB, but I still like keeping them on separate PCBs. 🤷♂️
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Jason Coon (jasoncoon@leds.social)'s status on Friday, 15-Mar-2024 06:59:27 JST Jason Coon
Someone asked for a Fibonacci LED PCB even smaller than the 1" (25.4mm) Fibonacci128. I pointed out the problem of where to put the microprocessor & battery, they pointed out the 14mm TinyLily.
So now I've crammed 55 x 1mm² XingLight WS2812 onto a 14mm PCB, ordering prototypes soon. 😅
https://tinycircuits.com/products/tinylily-mini-processor