Nostr enabled ecash fedimint with microcontroller for signing and holding ecash notes.
PoC already exists, except for the microcontroller part.
Would stream most of it and try to teach people along the way. 
nostr:nevent1qqsf0puxzemwskjjwd2safp4q4mgeaykghdvlcpu3gr070yakn2daxcpp4mhxue69uhkummn9ekx7mqzyprqcf0xst760qet2tglytfay2e3wmvh9asdehpjztkceyh0s5r9cqcyqqqqqqg2c8vvy