32812 Parallax Inc, 32812 Datasheet - Page 6

• Manufacturer Part Number: 32812
• Description: BOARD PROPELLER PROTO USB
• Manufacturer: Parallax Inc
• Series: Propeller™r
• Type: MCUr

Specifications of 32812

• Contents: Board
• Processor To Be Evaluated: P8X32A-Q44
• Interface Type: USB, VGA
• Dimensions: 7.75 cm x 10.6 cm
• Maximum Operating Temperature: + 80 C
• Operating Supply Voltage: 6 V to 9 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: Propeller Education (PE) Kit
• For Use With: 122-32000 - MANUAL PROPELLER
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Part 4: Interacting with the real world.
In this exercise, you will need a Light Emitting Diode, otherwise known as an
“LED” to connect to your Protoboard. The LED gets its name from the fact
that it is a diode, a device which only allows electricity to flow in one
direction, and lights up.
When you look closely at an LED, you will notice that one wire is a little
shorter than the other. The shorter wire is called the Cathode -. The longer
wire is the Anode +. There is an easy way to remember how to hook up an
LED. The Cathode is the negative side of the connection.
You can use the memory trick of: shorter=negative.
Generally it is a good idea to use a protective resistor when connecting an
LED to your Protoboard. We’ll slip the LED into the connection points
intended for the VGA header and its resistors already on our Protoboard to
protect the LED from damage.
The LED is now connected to pins P23 and GND. Our program will control the LED by
toggling the output of P23 and making it flash. The program is called ConstantBlinkRate and
is part of the Propeller Educational series written by Andy Lindsay of Parallax. This series is
free to download and recommended for all Propeller users.
Normally we would insert a part into the holes and
solder the connections on the bottom side. Since
the holes we are using are intended for something
else, just carefully insert the LED as shown.
The LED should make reasonable contact as long
as it is inserted and handled carefully for this
exercise.