Guide

www.SquishyCircuits.com Page 11
Did You Know? –
Many switches use ‘I’ and ‘O’ to indicate on and off. It is believed
that these symbols originate from binary which uses 0 to
represent off and 1 to represent on. Binary is a way to denote
numbers with only 0 and 1s and is used for coding, data storage,
and more.
A more useable example of a series circuit is to use the switch. If you put the switch in series with the
LED, then the circuit will either be open or closed depending on the switch!
I
O