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Parallel I/O Control with a BASIC Stamp® Module
Appeared in the 2003 Product Catalog.
Seven Segment LED Example Demonstrates Ease of Use
Parallel I/O control is a useful way to control stepper motors, LCDs and seven-segment LEDs. For educational purposes, a seven-segment display is an inexpensive way to provide a user interface. They’re also an ideal follow-up to single I/O control of LEDs. In industry, seven-segment LEDs are often used in extreme temperatures, dark conditions or low-cost applications.
This project demonstrates the use of constants for parallel I/O control. Instead of using commands like HIGH and LOW which address a single I/O pin, OUTL can be used to control the first eight I/Os at the same time. In conjunction with a LOOKUP table it’s really easy to cycle through the different digits of a seven-segment LED.
For this project you need the following parts:
- BASIC Stamp 2 Module
- Board of Education® carrier board
- Seven-segment Display
- (8) 470 ohm resistors
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