
M
aybe you think of a radio transmitter as being
a tower 200 feet high, standing out in a field
somewhere, or a heavy-duty military device on a
combat vehicle. But a transmitter doesn’t have to
be large, complicated, or expensive. You can use
just a dozen cheap components on your kitchen
table to deliver a radio transmission.
In this first experiment, two basic timer chips will
create a signal and a carrier wave, which ...