Quantity | Component name | |
12 | × | ws2812B addressable leds |
1 | × | Atmega328PU TQFP AKA arduino |
1 | × | DS1302 RTC RTC that works at 2V |
1 | × | 32.768 khz crystal for timekeeping |
1 | × | Selector switch |
1 | × | 3.7V 110mAh battery any battery small enough will do |
1 | × | Arduino duemilanove or uno for programming the blank avr |
1 | × | JST terminal for the batery |
1 | × | hydrogen peroxide half of my prefered etchant |
1 | × | hydrochloric acid, AKA muriatic acid this is actually a pool supply, and the other half of my prefered etchant |
1 | × | sheet of double sided copper clad pcb |
1 | × | laser printer |
1 | × | cheap off-brand purple stick glue name brand works too well, get the cheap crap! |
1 | × | emergency eye wash seriously though |
2 | × | gloves |
1 | × | eye protection |