122-28029 Parallax Inc, 122-28029 Datasheet - Page 15

• Manufacturer Part Number: 122-28029
• Description: GUIDE STUDENT SMART SENSORS
• Manufacturer: Parallax Inc

Specifications of 122-28029

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Smart Sensors
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

making it easier to isolate program bugs. It's also a handy tool for testing circuits,
sensors, and more.
The Debug Terminal has one drawback, and that's the serial cable connection. Consider
how many times it wasn't convenient to have your board connected to the computer to
test a sensor, or find out what the Boe-Bot robot was "seeing" with its infrared object
detectors in another room. These are all situations that can be remedied with the Parallax
Serial LCD shown in Figure 1-3. Once you've built up a sensor circuit on the Board of
Education, you can use a battery and the Parallax Serial LCD to take the setup as far
away from your programming station as you want, all the while displaying sensor
measurements and other diagnostic information.
The Parallax 2×16 Serial LCD has two sixteen-character-wide rows for displaying
messages. The display is controlled by serial messages from the BASIC Stamp. The
BASIC Stamp sends these messages from a single I/O pin that is connected to the LCD's
serial input. There are two versions, standard and backlit:
Serial Vs Parallel LCDs
The Parallel LCD is probably the most common type of LCD. It typically requires a minimum
of 6 I/O pins for the BASIC Stamp to control. Also, unless you are using a BASIC Stamp 2p,
2pe, or 2px, the code for controlling them tends to be more complex than serial LCD code.
The serial LCD is actually just a parallel LCD with an extra microcontroller. The extra
microcontroller on the serial LCD converts the serial messages from the BASIC Stamp to
the parallel messages that control the parallel LCD.
Version
Standard
Backlit
Parallax Part #
27976
27977
Chapter 1: Parallax Serial LCD Display · Page 3
Figure 1-3
Parallax (2×16)
Serial LCD