Nano as ICSP / UPDI cases

prusaprinters

I build a lot of stuff using Arduinos, and especially with ATtiny MCUs. ATtinys require the use of an ICSP programmer (the older attiny series) or a UPDI programmer (the newer attiny series).Both programmers can be fashioned from a simple Arduino Nano, and "Arduino as ISP" is included in ATTinyCore ("jtag2updi" is included with MegaTinyCore).Guides for the electronics:Arduino Nano as an ISP ProgrammerDIY UPDI USB programmer which can be made with cheap hardwareI modified Cheap DIY UPDI USB programmer from daumemo to allow multicolor printing and include an ICSP case with holes for the LEDs (although they aren't really necessary if you use a filament that isn't completely opaque).The files are intended to be used with the z-hop multicolor method.