Parallax Boe-Bot Student Manual page 326

Page 312 · Robotics with the Boe-Bot
connected by lines on a schematic, the line indicates that an electrical connection is made.
Lines can also be used to connect components to voltage supplies. Vdd, Vin, and Vss all
have symbols. Vss corresponds to the negative terminal of the battery supply for the
Board of Education or BASIC Stamp HomeWork Board. Vin is the battery's positive
terminal, and Vdd is regulated to +5 volts.
Let's take a look at an example that uses a schematic to connect the parts shown in Figure
D-2. For each of these parts, the part drawing is shown above the schematic symbol.
LED
Figure D-3 shows an example of a circuit schematic on the left and a drawing of a circuit
that can be built using this schematic on the right. Notice how the schematic shows that
one end of the jagged line that denotes a resistor is connected to the symbol for Vdd. In
the drawing, one of the resistor's two leads is plugged into one of the sockets labeled
Vdd. In the schematic, the other terminal of the resistor symbol is connected by a line to
the + terminal of the LED symbol. Remember, the line indicates the two parts are
electrically connected. In the drawing, this is accomplished by plugging the other resistor
lead into the same row of 5 sockets as the + lead on the LED. This electrically connects
the two leads. The other terminal of the LED is shown connected to the Vss symbol in
the schematic. In the drawing, the other lead of the LED is plugged into one of the
sockets labeled Vss.
Gold
Silver
Figure D-2
or
Part Drawings and
Blank
Schematic Symbols
Yellow Brown
Violet
LED(left) and
470
Ω
470
Ω
resistor (right)