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being programmed by a computer. symbols below, as well as the
These “programmable” chips get sample circuit to get an idea.
plugged into a computer, have Here’s a list of the symbols you’re
“software” uploaded to them, and going to see in the schematics in
then they do something different. this unit:

For example, the chip that is used
to scroll the digital display of the
clock you’ll build in this unit could Ammeter-It is used to
be re-programmed to control an measure the current
automatic coffee maker or guide a flowing.
small robot to follow a line drawn
on a sheet of paper.
Amplifier-It is used to
A common type of programmable amplify the signal.
chip is called a microprocessor.
These are the “brain” of a typical
home computer. A cousin of the AND GATE-It contains
microprocessor is the two binary values as
microcontroller. A input

microcontroller is like a whole
computer on a chip. I won’t go
into the details here, but know that Antenna-It is used to
they are used in just about every catch the signal
electronic device these days that
has to do much more than just
turn on and off a simple circuit. Battery-DC current. It
has its value in volts
e.g 9 volt battery

Schematics

A schematic is a simple line- Capacitor-It is a type of
drawing of an electrical circuit. It storage storing current.
makes it easy to draw a circuit
without having to draw actual
pictures of each part. A wire is Circuit Breaker-As name
simply a line. A motor is a circle says it divides the circuit.
with an “M” in it (lots easier than
trying to draw a picture of a motor.
Take a look at the schematic Diode -It stops the current
flow in one direction.

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