Datasheet

Shield, Lights, Servo Motors • Chapter 2
Robotics with the BOE Shield-Bot • 51
Always disconnect power to your board before building or modifying circuits!
1. Set the BOE Shield’s Power switch to 0.
2. Disconnect the programming cable and battery pack.
Building the LED Test Circuits
The image below shows the indicator LED circuit schematic on the left, and a wiring diagram
example of the circuit built on your BOE Shield’s prototyping area on the right.
 Build the circuit shown below. If you are new to building circuits, try to follow the
wiring diagram exactly.
 Make sure your LED cathode leads are connected to GND. Remember, the cathode
leads are the shorter pins that are closer to the flat spot on the LED’s plastic case.
Each cathode lead should be plugged into the same 5-socket row as the wires that
run to the GND sockets.
 Make sure that each longer anode lead is connected to the same 5-socket row as a
resistor lead.
The next picture will give you an idea of what is going on when you program the Arduino to
control the LED circuit. Imagine that you have a 5 volt (5 V) battery. The Board of Education
Shield has a device called a voltage regulator that supplies 5 volts to the sockets labeled 5V.
When you connect the anode end of the LED circuit to 5 V, it’s like connecting it to the
Cathode
leads
Schematic Wiring Diagram
Look—this
5-socket row
connects two
wires and one
LED cathode
together.