28123 Parallax Inc, 28123 Datasheet - Page 317

• 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

Page 312 · What’s a Microcontroller?
GENERIC DC SUPPLIES
For best results with the BASIC Stamp HomeWork Board or any of the Board of
Education Revisions, use a DC supply (also called an AC adapter) with the following
ratings:
Input
This depends on which country you live in and the amplitude and frequency of the AC
power at the wall outlets. For the USA and Canada, the input should be 120 VAC, 60
Hz.
Output
6 VDC, 800 mA
The mA rating can be higher. A 6 V, 1000 mA supply would be acceptable, for example.
Plug
The Board of Education has both a barrel jack, which can be connected to a barrel plug,
and a 9 V battery connector, which can be connected to a 9 V battery extension. The
HomeWork Board has only the 9 V battery connector.
Barrel Plug
Figure D-1 shows DC supply commonly used with the BASIC Stamp and Board of
Education. It has a 2.1 mm center-positive barrel plug along with the center positive
symbol that is evident on its label.