Well made the general shopping list. I still have small caps and resistors from the many years a go, some of the parts he used were not available so I have alternatives.
Think this should be fine?
0.47F 5.4V Supercap
ATTiny84A
1N752A Zener Diodes
MCP1702-LDO-Low Quiescent 250mA 3.3V
Diodes - 1N4148a
4MHz Crystals (Optional)