28123 Parallax Inc, 28123 Datasheet - Page 72

• 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

Controlling a bi-color LED with the BASIC Stamp requires two I/O pins. After you have
manually verified that the bi-color LED works using the manual test, you can connect the
circuit to the BASIC Stamp as shown in Figure 2-19.
P15
P14
P15
P14
P13
P12
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
√
X2
X3
Connect the bi-color LED circuit to the BASIC Stamp as shown in Figure 2-
19.
Vdd
470 Ω
1
Vin
2
Vss
1
2
P15
P14
P13
P12
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
X2
X3
P15
P14
P13
P12
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
1
Vdd
X2
X3
2
Vdd
Vin
2
Vin
Vss
1
Vss
Figure 2-19
Bi-color LED Connected
to BASIC Stamp
Figure 2-18
Manual bi-
color LED
Test
Bi-color
LED red
(left) and
green
(right).