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PC
Temperature Controller - Here is a simple temperature
controller that turns your personnel computer (PC) off when the temperature of the PC increases beyond the
optimal temperature value. Some of the larger integrated circuits become quite hot and if the temperature inside
the PC becomes too high, these devices may not be able to dissipate heat fast enough. This, in turn, could lead
to failure of devices and eventually of the PC. . . . [© EFY Enterprises Pvt. Ltd. All rights reserved.]
PC Thermometer - This incredibly simple thermometer plugs on any free serial port. Does not make use of any
programmable components as microcontrollers. It gives temperature readings accurate to 0. 5°C with no
calibration. It's cheap, so I've put one on any PC I use. And it is so nice to have the temperature shown on the
Windows taskbar, that a million friends asked me to build one. . . . [by IQ Technologies Industry, unless
otherwise noted online]
PC thermometer - A simple yet accurate thermometer that adds a "temperature icon" to the Windows taskbar.
Measures one or two (indoor and outdoor) temperatures. . . . [Alberto Ricci Bitti]
PC Thermometer using PC Game
Joystick Port - . . .
PC Thermometer v2 - A method of measuring temperature using the PC Game port. Display is via the program dialog
or in the System tray. V2. 2. 5 supports timed FTP to a web server. . . . [by IQ Technologies Industry, unless
otherwise noted online]
PC Timer - Primarily intended for installation into a desktop PC, this versatile timer with adjustable
time output provides controlled ‘on’ time for PC peripherals like printers, scanners and desktop reading lamps. .
. . [© EFY Enterprises Pvt. Ltd. All rights reserved.]
PC to microcontroller communications using
power from the PC serial port - Microcontroller based
electronic circuit. . .
PC to SRAM Interface - for the XSV Board (Univ. of Queensland) . . .
PC/XS Transfer - A circuit and C code for bidirectional transfer of data between an XS40 Board and a PC. . .
PCB Grounding System & FAN2001/FAN2011
High Performance DC-DC Converters/AN-42036 - Fairchild App
Note. . .
PCB Trace Width Calculator - This Javascript web calculator calculates the trace width for printed circuit boards based
on a curve fit to IPC-2221 (formerly IPC-D-275). Also see the via calculator. . . . [by Brad Suppanz]
PC-Based
Candle Ignitor - Here’s a PC-based lighting system that
lets you light up a candle using matchsticks by just pressing the ‘Enter’ key on the PC’s keyboard. It is
especially useful when celebrating such occasions as birthdays and anniversaries. . . . [© EFY Enterprises Pvt.
Ltd. All rights reserved.]
PC-Based Configurable Filter Uses No Digital Potentiometers - 01/23/03 EDN Design Idea Fleapower flasher draws less than 50 µA - Modern instrumentation
requires digital control signals. These signals come from a central microprocessor or, in modern context, the
popular parallel or serial PC ports. In recent times, di. . . [by Saurav Gupta and Tejinder Singh, New Delhi,
India]
PC-Based DC
Motor Speed Controller - This circuit allows you to
control the speed of a DC motor (in eight levels) from your PC’s parallel port. The PC uses a software program to
control the speed of the motor. . . .
PC-Based ISA Data Acquisition & Control Board - . . .
PC-Based ISA Data Acquisition & Control Board - . . .
PC-Based Oscilloscope - . . .
PC-Based
Stepper Motor Controller - This stepper motor controller
is perhaps the cheapest, smallest and simplest. A pair of H-bridges with a software program written in ‘C++’ is
used to control the bipolar stepper motor with a step resolution of 18 degree per pulse. . . . [© EFY
Enterprises Pvt. Ltd. All rights reserved.]
PC-Based
Wireless Control for Toy Car - Here we show how you can
control a toy car through your PC’s serial port using a pair of ASK transmitter and receiver modules. The
received signal is decoded by a P89V51RD2 microcontroller and fed to the motor driver circuitry to move the toy
car in forward, backward, right or left direction. . . . [© EFY Enterprises Pvt. Ltd. All rights reserved.]
PC-board layout eases high-speed transmission - 08-Nov-01 EDN Design Idea As digital techniques move to higher speeds, designers become
aware of the need to treat pc-board traces as RF transmission lines. In these lines, you strive to hold the line
impedance, Z0, to a constant value—typically, 50Ω—and to. . . [by Gregory Adams, Moorestown Microwave Co,
Moorestown, NJ]
PC-Board Shields - 02/19/04
EDN Design Idea Many pc-board assemblies require shields to reduce susceptibility to interference from
electromagnetic fields. A classic example is a radio receiver, in which the front end usually needs high
isolation from the tuning synthesizer. Historically, shields for low-volume or low-cost applications involve
trade-offs. You can't justify the cost of a custom-cast shield, and shields machined from aluminum burn through
money as fast as the end mills go dull. You can make a simple shield for just a few dollars by using commonly
available die-cast aluminum "project boxes, " such as those from Hammond Manufacturing (www. hammondmfg. com).
These boxes come in sizes from 2×2 in. to more than 7×4 in. You turn the project box into a shield by sandwiching
the pc board between the top and the bottom of the box, thus completely enclosing the sensitive circuitry. . . .
[by Steve Hageman, Windsor, CA ]
PC-Driven
LED Display - Here is a circuit to generate sequentially
running light effects using a simple program written in C. The output of the program is taken from the LPT port
of a PC and then fed to the interfacing circuit for the LED display. The outputs of the interfacing circuit are
decoded, inverted, and then connected to LEDs through optocouplers. . . . [© EFY Enterprises Pvt. Ltd. All
rights reserved.]
PC's BIOS interrupt drives twin stepper motors - 09/14/00 EDN Design Idea A simple and low-cost design achieves a twin stepper drive using
a PC's special BIOS interrupt, INT1Ch, through the PC's parallel port (Figure 1). Turbo C control software
programs the parallel port for the task of independently r. . . [by J Jayapandian, Indira Gandhi Centre for
Atomic Research, Kalpakkam, India]
PC's parallel port and a PLD host multiple stepper motors and switches - 02/16/06 EDN Design Idea Well-suited for robotics applications requiring motion in
several direction. . . . [by Eduardo Perez-Lobato]
PC's parallel port to program a clock source - 12/07/04 EDN Design Idea This Design Idea shows how you can use Linear Technology's
LTC6903 programmable oscillator as a clock source for direct-digital synthesis, data conversion,
switched-capacitor filtering, clock, and voltage-controlled oscillator c. . . [by William Grill, Honeywell BRGA,
Lenexa, KS]
PCS RF
stage design: tackling the trade offs - 11/21/96 EDN
Design Feature Building Effective RF design requires that you carefully manage trade-offs. You'll have to accept
less-than-optimum performance in some dimensions to achieve your primary objectives. . . [by Bill Schweber,
Technical Editor]
PC's: not just another cell phone - 11/21/96 EDN Design Feature Building Thanks to the availability of low-cost digital chip
sets, PCS is now becoming affordable and finding use in fax, e-mail, and palmtop computer functions. Capitalizing
on that affordability, PCS providers and IC makers . . . [by Stephen Kempainen, Technical EDFtor]
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