Thinking back on this, I think it's entirely possible to build this product without an RTC or microcontroller. It should be entirely possible to wire up a switc

Thinking back on this, I think it's entirely possible to build this product without an RTC or microcontroller. It should be entirely possible to wire up a switch, 555 timer(s), vibrator, and a battery... and easily build it for less than $10 in electronic parts.