28123 Parallax Inc, 28123 Datasheet - Page 71

• 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

Bi-Color LED Circuit Parts
(1) LED – bi-color
(1) Resistor 470 Ω (yellow-violet-brown)
(1) Jumper wire
Building and Testing the Bi-Color LED Circuit
Figure 2-18 shows the manual test for the bi-color LED.
LED-
Red
√
√
√
√
√
√
√
√
Vdd
Vss
Disconnect power from your Board of Education or HomeWork Board.
Build the circuit shown on the left side of Figure 2-18.
Reconnect power and verify that the bi-color LED is emitting red light.
Disconnect power again.
Modify your circuit so that it matches the right side of Figure 2-18.
Reconnect power.
Verify that the bi-color LED is now emitting green light.
Disconnect power.
1
2
470 Ω
Vdd
Vss
2
1
470 Ω
LED-
Green
Vss
470 Ω
Vss
1
2
Figure 2-17
Bi-color LED
and Applied
Voltage
Red (left),
green (center)
and no light
(right)