28123 Parallax Inc, 28123 Datasheet - Page 76

• Manufacturer Part Number: 28123
• Description: TEXT WHAT'S A MICROCONTROLLER
• Manufacturer: Parallax Inc
• Type: Programmingr

Specifications of 28123

• Style: Book
• Title: What's a Microcontroller?
• Contents: Whats a Microcontroller? Text
• Product: Microcontroller Accessories
• Core Processor: PIC16C57c
• Flash: 128 Bytes
• Operating Supply Voltage: 9 V
• Board Size: 31 mm x 16 mm
• Lead Free Status / RoHS Status: Not applicable / Not applicable

SUMMARY
The BASIC Stamp can be programmed to switch a circuit with a light emitting diode
(LED) indicator light on and off. LED indicators are useful in a variety of places
including many computer monitors, disk drives, and other devices. The LED was
introduced along with a technique to identify its anode and cathode terminals. An LED
circuit must have a resistor to limit the current passing through it. Resistors were
introduced along with one of the more common coding schemes you can use to figure out
a resistor’s value.
The BASIC Stamp switches an LED circuit on and off by internally connecting an I/O
pin to either Vdd or Vss. The
internally connect one of its I/O pins to Vdd, and the
internally connect an I/O pin to Vss. The
Stamp to not execute commands for an amount of time. This was used to make LEDs
stay on and/or off for certain amounts of time. This amount of time is determined by the
number used in the
The
LOOP
loop, the program can still be re-started by disconnecting and reconnecting power or
pressing and releasing the Reset button. A new program can also be downloaded to the
BASIC Stamp, and this will erase the program with the infinite loop.
Current direction and voltage polarity were introduced using a bi-color LED. If voltage
is applied across the LED circuit, current will pass through it in one direction, and it
glows a particular color. If the voltage polarity is reversed, current travels through the
circuit in the opposite direction and it glows a different color.
Questions
1. What is the name of this Greek letter: Ω, and what measurement does Ω refer
2. Which resistor would allow more current through the circuit, a 470 Ω resistor or
3. How do you connect two wires using a breadboard? Can you use a breadboard
DO…LOOP
keywords will execute over and over again. Even though this is called an infinite
to?
a 1000 Ω resistor?
to connect four wires together?
can be used to create an infinite loop. The commands between the
PAUSE
command’s
HIGH
command can be used to make the BASIC Stamp
Duration
PAUSE
argument.
command is used to cause the BASIC
LOW
command can be used to
DO
and