28123 Parallax Inc, 28123 Datasheet - Page 175

• 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

ACTIVITY #1: BUILDING AND TESTING THE 7-SEGMENT LED DISPLAY
In this activity, you will manually build circuits to test each segment in the display.
7-Segment LED Display Test Parts
(1) 7-segment LED display
(5) Resistors – 1 kΩ (brown-black-red)
(5) Jumper wires
7-Segment LED Display Test Circuits
√
√
With power disconnected from your Board of Education or HomeWork Board,
build the circuit shown in Figure 6-4 and Figure 6-5.
Reconnect power and verify that the A segment emits light.
What’s the x with the nc above it in the schematic? The nc stands for not connected or
no-connect. It indicates that a particular pin on the 7-segment LED display is not connected
to anything. The x at the end of the pin also means not connected. Schematics sometimes
use just the x or just the nc.
1
E
3
4
C
6
B
7
A
8
9
F
10
G
5
DP
LED’s
Figure 6-3
7-Segment
Schematic