Andrew Armstrong

Rated 3.50(20) — Andrew Armstrong

The 123 Tally Tool is used to count things.It not only records "how many", it also records "when" and "where" things were counted, and can display the data on map or email a log of your sightings anywhere.You can add any number of counters, and group...

Rated 4.67(3) — Andrew Armstrong

This is a tool to help electronics hobbyists easily select component values for the ubiquitous 555 Timer chip. You simply enter the frequency (or alternatively the delay period) that you want your 555 timer chip to run at - and an initial timing capacitor

Rated 4.07(820) — Andrew Armstrong

This is a tool to help electronics hobbyists easily select component values for the ubiquitous 555 Timer chip. You simply enter the frequency (or alternatively the delay period) that you want your 555 timer chip to run at - and an initial timing capacitor