alarms, Animated displays, Household automation, Industrial control,
Robots, Data acquisition and processing, Hobbies, Toys, Games....
on the Basic Stamp 2 chip, code is as easy as “IF (this) THEN (do
that)” Imagine the power of a computer that fits in your hand,
making decisions and executing physical tasks! Light LED's, activate
relays, sense motion, vibration, light, heat, Your imagination is
on the economical and powerful Basic Stamp 2 chip
These plans will produce a simple,
low cost yet powerful Programmable Logic Control.
This project is perfect for the
student, hobbyist, shop technician, or even the experienced
Built from readily available
low-cost materials and current technology.
Designed for the experimentor!
Starter code is supplied via email for direct transfer to PLC!
COMMAND RELAYS TO ACTIVATE ELECTRONICS
MEASURE RPM, LIGHT, HEAT, TIME
SAVE MONEY, LEARN BY BUILDING IT YOURSELF!
SIMPLE, EASY TO UNDERSTAND PROGRAMMING FORMAT
BASED ON A POPULAR, ECONOMICAL AND WELL SUPPORTED
IT YOURSELF IN ONE EVENING!
2 PLC PLANS
X 4) LCD DISPLAY
IT FOR LESS THAN $100
INCLUDED! WIRE, ZAP AND GO!
THOSE WHO HAVE PREVIOUS EXPERIENCE with the Basic Stamp, this
is a straightforward project. It interfaces a MAX1270 A/D converter
and debugs on a serial LCD. You will be surprised at the few lines
of code that operate the core of this PLC! I supply a base program
that reads one channel of the A/D converter and displays that reading
on the Serial LCD 20x4 Backlit screen. The end user can simply copy,
paste, and modify the code to their needs.
those WITHOUT previous experience with the Basic Stamp, don't
be doubtful of your success! I strongly recommend the Parallax book
“What is a Microcontroller?” It includes a fully
functional Basic Stamp 2, with lots of essential electrical
components, and an enjoyable, informative, step by step approach to
understanding and programming the BS2. You'll have lights blinking
and speakers beeping in no time with the components supplied in the
$80 kit. I picked my copy up from a local Radio Shack (call to
verify they have it), and I strongly recommend it!
supplied with the plans will be emailed to the buyer upon date of
schematic shipment (less than 24 hours after purchase excluding
Sundays). It can then be downloaded directly to the Basic Stamp from
a PC. Included is code to verify the basic stamp is working, code to
verify the LCD is working, and finally the code that displays a value
from the ADC to the LCD screen. The color .JPG schematic is emailed with the starter code. The schematic and code is original and deduced from
components utilized to construct the PLC. My schematic
cannot be reproduced or redistributed under penalty of law.
($30) BS2 “OEM” in kit form, ($50
assembled) + ($10) programming cable, OR
if you are starting from square one, “What is a
Microcontroller?” (Windows) Educational kit containing all
needed materials (including programming
cable) to successfully jump into the world of Basic Stamps.
($20) Max1270 Analog to Digital
Converter. (Better prices can be found with a little detective
work.) Parallax carries this, Dallas-Maxim makes it. Analog to
Digital converters “talk” to the microprocessor through serial
communication, all that is included in the code. You will be
surprised at how simple it is! It has 8 analog inputs with a wide
range of input voltages up to 10 vdc. Depending on your application,
this component can be omitted or substituted for a 4 channel ADC
etc. Nonetheless, with these plans you will have the ability to get
an ADC up and running with almost no effort! www.parallax.com
($13-$50) 20x4 Serial LCD Display,
back light optional. (Thats 20 Characters wide, 4 lines) Rather
than wasting I/O lines and being tied down by a cable to the PC, LCD
is by far the most attractive way to go for data display. A back
light will drain a household 9V battery in a fairly short time, but
is good for midnight tinkering. I found the $13 displays (s&h
included) on www.ebay.com
and they work perfectly. I don't recommend buying used LCD's.
different size LCD display (16x2 etc) can be used by re-configuring
the LCD driver chip listed below.**************
($5) Serial LCD kit #117. Specific
commands and a schematic comes with this kit. Available from
this nifty product (containing a pre-programmed chip, resistors, and
nearly enough wire for this whole project) uses one I/O pin to
transfer characters to the LCD screen. A small printed circuit board
($8) is available to “piggyback” all the kit components to the
LCD itself, and clean up the project's wiring. The entire assembled
20x4 LCD is available from phanderson as well, if you're in a hurry.
I am not affiliated with P H Anderson.
($10-$50) Misc Radio Shack components
such as wire, resistors, capacitors, breadboard, project box,
buttons, photoresistors, solder, tools, 9V DC wall adapter, etc.
= $68 (no frills) to $223 (complete, professional enclosed unit)
do not supply any hardware whatsoever. My comments above simply
reflect what the end user will get for their investment.***
in mind that a Parallax PLC without a Basic Stamp, LCD Display, or
A/D chip costs $199 alone.
as of September, 2006 are dictated by the manufacturers and subject
to change without notice.
assume no liability for any damage caused by end user misuse or
and code is guaranteed to function as described, as delivered. If
unhappy with my product, simply mail it back for a full refund!
support is limited and is done in my free time (what I have of it!)
I will address all issues to the best of my ability, or I will
advise where to find a solution. Don't wire in a hurry! I usually
miss a connection, or whatnot. Double
check your work before contacting me for help.
any questions or comments to firstname.lastname@example.org
I am not
affiliated with any companies whatsoever.