download cable. Check with a Microchip sales representative. This
may seem like a lot of work. And for a single project, it certainly is.
But few people use a microcomputer for only one project. Many
users develop dozens or even hundreds of software ideas. Like any
other endeavor, it takes some up-front investment in time and money to obtain the capability to use microcomputers. But once you do,
there is a whole new world that opens up. I hope this helps.
SEE MORE C8051F120 APPS
I am wondering if Mr. Best will be using the C8051F120 in a
series of articles and what types of applications will be covered.
Response: Thanks for reading Design Cycle!
What you saw in the April and May Design Cycle columns will
be taken a bit further one more time in this issue.
I will not cover any specific C8051F120 “applications.” However, I will provide some additional practical coding examples that
are intended to show off the bulk of the C8051F120’s features while
providing a leg-up to the prospective C8051F120 programmer. For
instance, I’ll provide code that will demonstrate the use of the
C8051F120’s Multiply and Accumulate module, as well as code to
implement interrupt-driven RS-232 communications.
I hope you’ve enjoyed the C8051F120 stuff that has been
offered up thus far. Again, thanks for taking time to read Nuts & Volts
and the Design Cycle column.
what your furnace requires to run. Actually, 1/6 HP is closer to
500 watts, but sometimes the current draw is based on a peak calculation, or perhaps your specification includes associated control
Continued on Page 45
Extreme Robot Speed Control!
6 14V - 50V - Dual 80A H-bridges - 150A+ Peak!
6 Adjustable current limiting
6 Temperature limiting
6 Three R/C inputs - serial option
6 Many mixing options - Flipped Bot Input
6 Rugged extruded Aluminum case
6 4. 25" x 3. 23" x 1.1”
$29.99 Scorpion HX Scorpion XL
Scorpion Mini 6 Dual 2.5A (6A pk) H-bridges 6 Dual 13A H-bridge 45A Peak!
6 2.5A (6A pk) H-bridge 6 Plus 12A fwd-only channel 6 5V - 24V
6 5V - 18V 6 5V - 18V 6 2. 7“ x 1.6” x 0.5”
6 1.25“ x 0.5” x 0.25” 6 1.6“ x 1.6” x 0.5”
6 Closed-loop control of two motors
6 Full PID position/velocity loop
6 Trapezoidal path generator
6 Giant Servo Mode!
6 PIC18F6722 CPU $250
6 C source for routines provided
6 See www.embeddedelectronics.net
H-bridges: Use with Dalf or with your Micro/Stamp
6 Monster power!
6 14-50V 160A!
6 3. 15”x4.5”x1.5”
6 3 wire interface
6 6-28V 25A!
6 2. 25”x2.5”x0.5”
6 3 wire interface
$79 6 current & temp rotection
CAN INVERTER(S) TAKE THE HEAT?
I enjoyed the article in the Dec ’06 issue about furnace
back-up. I plan to do this, but I need an
explanation about inverters. I am confused
about the specs mentioned. There seems
to be quality issues with them. Maybe an
article about inverters would be helpful.
My particular furnace has a 1/6 HP
motor. The plate says seven amps input,
115V. (I calculate 805 watts.) I am looking
at a Motor Trend brand sold through the
Sportman's Guide mail order catalog. It is a
3,000 continuous/6,000 peak optimum
efficiency 80%. I was thinking of also
running a battery charger off of this to keep
the battery charged. Any ideas? Help with
this would be greatly appreciated.
Phone: 253-843-2504 firstname.lastname@example.org
Response: Thank you for your feedback! I am always appreciative of anyone
who drops me a nice note about what they
Your power calculation is probably
fine; 805 watts (or 805 VA), is near enough
June 2007 9