STAMP 2 Communications And Control Projects.pdf

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THE BASIC STAMP 2
CONTENTS AT A GLANCE
Advantages of STAMP 2
Approaches to Construction
Alternative STAMP 2
An Exercise
The BASIC STAMP 1 (BS1) was the first of the STAMP series, using a miniversion of
BASIC or BASIC tokens in order to program the microcontroller. The BASIC STAMP 1C
features a 256-byte EEPROM, or about 75 instructions, and runs at 4 Mhz, performing
2000 instructions per second. A revision of the STAMP 1 later became the STAMP 1 rev.
D. The latest version of the BASIC STAMP 1 is the STAMP 1 module shown in Fig. 1-1.
Figure 1-2 depicts the BASIC STAMP 1 schematic. The STAMP 1 is programmed via the
parallel port of a personal computer. All of the projects in this book will use the BASIC
STAMP 2 (BS2) microprocessor, which sports a 2048-byte EEPROM for about 500
instructions, and runs at 20 MHz, performing 4000 instructions per second. Table 1-1
shows some comparisons between the STAMP 1 and STAMP 2 input/output instructions.
The STAMP 2 runs much faster, has a number of extra commands, such as FREQOUT,
SHIFTIN, DTMFOUT, and XOUT, and will hold larger programs than the original
STAMP 1. The BASIC STAMP 2 has become the de facto microprocessor for sensing and
control applications, a model that a number of other companies have decided to follow.
The STAMP 2 is a very versatile and popular microprocessor building block that can
be used to develop many different electronic sensing and control systems (see Fig. 1-3).
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