Hacking the Timex m851
Part of the magic is how bonkers frugal the Epson SoC (PN S1C88349) is: when running at a low-power mode at 32kHz, it consumes an astoundingly low 9 <i>micro</i>amps. [1] How much do you think you could get done with a cycle budget of 32k per second?<p>That, and alongside 48K ROM and 2K RAM, you get 3 timers, a UART, and an A/D converter.
[1] <a href="https://global.epson.com/products_and_drivers/semicon/pdf/id002478.pdf" rel="nofollow noreferrer">https://global.epson.com/products_and_drivers/semicon/pdf/id...</a>