|
Pal Controls Simple Dual Port Memory - 03/01/96 EDN-Design Ideas / (added 11/05)
|
|
Pal Facilitates In System Programming - 02/02/02/95 EDN-Design Ideas / (added
11/05) |
|
Pal Powers Universal Isa Bus Interface - (electronic circuit added 4/05) |
|
Palmpilot Turbo Boost Guage Interface - ….(circuit design added 06/09) |
|
Parallel (Printer) Port Interface - National Semiconductor Application Note
(app note added 2/06) |
|
Parallel Application Of High Speed Link - (electronic circuit added 4/05) |
|
Parallel Avr Programmer - 1/2005, ANPB50REVA : 412 Kb (Apex App Note added
08/08/08) |
|
Parallel Connection Apex-An26 - ….(circuit design added 06/09) |
|
Parallel Port Adc Based On Max147 - information on using PC parallel port for I/O
and Windows drivers for that, useful for your own circuit interfacing
(added 4/02) |
|
Parallel Port Central - This is a very easy and fun to build project that will
allow you to control up to eight external devices through your computer's parallel
port. You may for instance control different appliances such as lamps, computers,
printers, TV sets, radios, music systems, air conditioners, air fans, garden
sprinklers and anything else you can think of, all through your computer.
….(electronic schematic added 11/08) |
|
Parallel Port Controller - 06/13/02 EDN Design Ideas / (added 1/05)
You can use the parallel port of your PC and a few additional components to generate a
powerful, easy-to-use arbitrary-waveform generator. By using a Visual Basic program
with the circuit in Figure 1, you can generate any waveform (for example, sinusoid,
triangle, amplitudeor frequency-modulated, or exponential decay) .... |
|
Parallel Port Controls Arbitrary Waveform Generator - PC parallel port was never
designed to provide any output power to divices connected to it. it was only designed
for connecting printer to your PC . But in this weird PC business everything changes.
Suddenly the parallel port have become a port where you can connect very wide
selection of devices like software protection dongles, removable disks, modems,
network adapters, printer sharing units, parallel port extenders, soundcards,
electronic telecard readers and many homebuilt circuits....(electronic schematic /
circuit added 11/05) |
|
Parallel Port Interfacing Made Easy - 10/23/97 EDN Design Ideas / (added
11/05) |
|
Parallel Port Powers Simple A/D Interface - 10/03/02 EDN Design Ideas /
(added 1/05) High-resolution temperature sensing at low cost is possible using
only one chip attached to the PC's parallel port (Figure 1). The Dallas Semiconductor
(www.dalsemi.com) DS1722 digital thermometer allows measurement resolution as fine as
0.0625°C in digital.... |
|
Parallel Port Provides High Resolution Temperature Sensing - Below are three
examples of controlling a relay from the PC's parallel printer port (LPT1 or LPT2).
Figure A shows a solid state relay controlled by one of the parallel port data lines
(D0-D7) using a 300 ohm resistor and 5 volt power source. The solid state relay will
energize when a "0" is written to the data line. Figure B and C show ….(electronic
circuit added 4/05) |
|
Parallel Port Relay Interface - (07/08/99 EDN Design Ideas / (added 11/05)
[Note: File contains multiple circuits. Scroll to find this one.] Many
applications use an embedded processor, which has certain needs: software, RAM, ROM,
board space, and others. Frequently, another host computer, usually a PC, controls the
application..... |
|
Parallel Port Replaces Embedded µC - (electronic circuit added 4/05) |
|
Parallel Printer Port Interface (Aaron Cake) - A useful device which can be built
(if you're patient enouch )into the shell of a DB-25 connector. It provides simple
visual indication of 8-bits of data useing LEDs and provides three inputs, via
switches. Plug it into a parallel port on your PC and then imbed special instructions
in your code to provide visual feedback, ....(circuit design added 7/06) |
|
Parallel-Port Debugging Aid - (electronic design added 6/07) |
|
Passive Ethernet Hub - (schematic / circuit added 10/02) |
|
Pbus Multi Drop Rs422/485 Type Ne2 Rk For Interconnecting Pic Nodes - National
Semiconductor Application Note (app note added 2/06) |
|
Pbx Linecard And Terminal - 09/29/94 EDN Design Ideas / (added 11/05)
|
|
PC Acts As Rs 232c Protocol Analyzer - 10/14/00 EDN Design Ideas / (added
5/05) |
|
PC And Dacs Generate Two Simple Analog Outputs - 06/09/94 EDN Design Ideas /
(added 11/05) |
|
PC And Dsp µP Interrupt Each Other - (electronic Circuit / Schematic added 10/04) |
|
PC Based 7 Segment Rolling Display - 01/23/03 EDN-Design Ideas / (added
3/03) 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, digital potentiometers have eliminated the hassles from this
interface for the analog section. Designers can .... |
|
PC Based Configurable Filter Uses No Digital Potentiometers - Here is a simple
technique for measuring frequencies over quite a wide frequency range and with
acceptable accuracy limits using a PC. It follows the basic technique of measuring low
frequencies, i.e. at low frequency, period is measured for a complete wave and
frequency is calculated from …. (added 10/05) |
|
PC Based Frequency Meter - (electronic circuit added 4/05) |
|
PC Based Thermometer Based On Dallas Ds1621 - Fairchild Application Notes / (app
note added 6/06) |
|
PC Board Layout Checklist: Dc-Dc Converters / Ab-11 - Fairchild Application Notes
/ (app note added 6/06) |
|
PC Board Layout Eases High Speed Transmission - DN76 Design Notes (Linear
Technology) (app note added 1/06) |
|
PC Card Power Management Techniques - Pericom Semiconductor Application Brief #
020 (app note added 02/05) |
|
PC Clock Offerings - 01/19/95 EDN-Design Ideas / (added 11/05) |
|
PC Communicates With Ad 2101 Dsp µP - 08/(07/03 EDN-Design Ideas /
(schematic / circuit added 11/03) This Design Idea presents a versatile filter circuit
for low-power-consumption instrumentation that you can program from your PC using the
parallel port. The circuit uses analog switches and laTChes instead of digital
potentiometers for the ...... |
|
PC Configurable Rlc Resonator Yields Single Output Filter - Fair Waring, site
contains annoying popups. This project was begun as a means to charge and cycle
NiCad batteries but has become a versatile tool for experiments requiring either a
controlled voltage up to +30V and/or a current of +/2.5 Amps. (added 5/05) |
|
PC Controlled Voltage Or Current Source - 04/05/06/96 EDN Design Ideas /
(added 11/0e) The circuit in Figure 1 is a simple cost-effective waveform
generator using PC control. You calculate the digital image of the desired waveform
and store it in the 32k X 8-bit RAM (62256) through the 74HCT245 data buffer and the
16-bit local-address bus generator built with the 74LS393 binary counters. |
|
PC Controls Inexpensive Waveform Generator - 08/19/99 EDN-Design Ideas / (added
5/02) Circuit design idea from EDN Magazine to control one light dimming from PC |
|
PC Controls Light Dimmer - (electronic circuit added 4/05) |
|
PC Electrically Isolated Rs422 Interface Using Sn75176b Or Max485 - (diagram added
2/07) |
|
PC Electrically Isolated Rs485 Interface Using Max487 Or Sn75176b - 01/18/01 EDN
Design Ideas / (addes 09/05) You usually use PC hardware monitors to keep a
close eye on power-supply voltage levels, the speed of system cooling fans, and even
the temperature of the CPU. Until fairly recently, this level of system monitoring was
reserved for high-end servers .... |
|
PC Hardware Monitor Reports The Weather - (circuit added 7/02) |
|
PC Infrared Remote Control #1 - (electronic circuit added 4/05) |
|
PC Interface For Point Controller - (schematic / circuit added 11/03) |
|
PC Ir Remote Control - 02/01/01 EDN-Design Ideas / (added 05/03) |
|
PC Monitors Two Way Rs-232 Transmission - National Semiconductor Application Notes
first published05-Aug-1995 (app note added 4/02) |
|
PC Mouse Implementation Using Cop800 - includes instructions how to connect a
relay to PC parallel port (added 4/02) |
|
PC Parallel Port Output Capabilities - Fairchild Application Notes / (app note
added 6/06) |
|
PC Power Supervisory Circuit With Ka3502 / An-4002 - Fairchild Application Notes /
(app note added 6/06) |
|
PC Power Supply Design With Ka3511 / An-4003 - 06/09/94 EDN Design Ideas /
(added 11/05) |
|
PC Printer Port Controls Frequency Divider - Maxim Application Notes / 253 /
Nov-07) (app note added 5/08) |
|
PC Printer Port Controls I V Curve Tracer - 01/20/94 EDN Design Ideas / (added
11/05) |
|
PC Programs Prom Simulator - 11/23/95 EDN-Design Ideas / (added 11/05)
|
|
PC Securely Controls Relay - (electronic circuit added 4/05) |
|
PC Serial And Parallel Port Software And Interfaces - Maxim Application Notes /
151 / Dec-07) (app note added 5/08) |
|
PC Serial Port Drives 12 Bit A / D Converter - This circuit was designed to
control a 32 channel Christmas light show from the PC serial port. Originally designed
with TTL logic, it has been simplified using CMOS circuits to reduce component count.
It is a fairly simple, reliable circuit that requires only 4 common CMOS chips (for 8
outputs), an optical isolator, and a few discrete components....(electronic circuit
added 4/05) |
|
PC Serial Port Receiver - (design circuit added 8/02) |
|
PC SmarTCard Reader - Fairchild Application Notes / (app note added 6/06) |
|
PC Smps Secondary Side Control Ic / An-4115 - This simple circuit can be used to
control the volume of PC speaker. The volume can be adjusted to any value between
total silence and full volume…..(design circuit added 8/02) |
|
PC Speaker Volume Control Circuit - (schematic / circuit design added 08/05) |
|
PC Thermometer - (circuit / schematic design added 6/06) |
|
PC Thermometer Using PC Game Joystick Port - ….(design added 08/08) |
|
PC Thermometer V2 - for the XSV Board (Univ. of Queensland) (added 4/02) |
|
PC To Sram Interface - A circuit and C code for bidirectional transfer of data
between an XS40 Board and a PC. (added 4/02) |
|
Pc/Xs Transfer - National Semiconductor Application Note (app note
added 2/06) |
|
Pc87310 Super I/O - Fairchild Application Notes / (app note added 6/06) |
|
Pcb Grounding System And Fan2001/Fan2011 High Performance Dc-Dc Converters / An-42036
- (electronic Circuit / Schematic added 10/04) |
|
Pc-Based Dc Motor Speed Controller - (diagram added 2/07) |
|
Pc-Based Isa Data Acquisition And Control Board - (electronic Circuit / Schematic
added 10/04) |
|
Pc-Based Oscilloscope - DN346 Design Notes (Linear Technology) (app
note added 2/06) |
|
Pci Express Power And Mini Card Solutions - An experiment of the PCI board to
build with generic parts, such as a GAL and TTL logics. PCI is a industrial standard
bus on the parsonal computers. But nobody tries to build the PCI board personaly, so I
tried it. And it had been completed with successful :-) (added 10/05) |
|
Pci Pio Board - Pericom Semiconductor App Note # 082 (app note added 02/05) |
|
Pci-X Gigabit Ethernet Card Design - AN60 Linear Technology Most portable systems
have expansion sockets conforming to the standards set by the Personal Computer Memory
Card International Association (PCMCIA). This standard requires the host to perform an
unusual amount of switching on both the VCC and VPP...(appnote added 2/06) |
|
Pcmcia Card And Card Socket Power Management - DN93 Design Notes (Linear
Technology) (app note added 2/06) |
|
Pcmcia Socket Voltage switching Design Note 93 - 2/16/06 EDN Design Ideas
/ (added 10/06) Well-suited for robotics applications requiring motion in
several direction. |
|
Pc's Parallel Port And A Pld Host Multiple Stepper Motors And switches - 11/21/96
EDN-Design Feature / (added 11/05) 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.—Bill Schweber, Technical Editor |
|
Pcs Rf-Stage Design: Tackling The Trade-Offs - 9/1/06 EDN Design Ideas
/ (added 10/06) Audio-frequency signal source uses few components. |
|
Pc's Serial Port Controls Programmable Sine-Wave Generator - 11/21/96 EDN-Design
Feature / (added 11/05) 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
are hoping to lure consumers with imaginative....—Stephen Kempainen, Technical Editor |
|
Pcs: Not Just Another Cell Phone - (application / block diagram added 6/07) |
|
Pda - Pericom Semiconductor Application Note # 081 (app note added 02/05) |
|
Pericom Pci-To-Pci Bridge Intel/Ti/Plx Substitute - Fairchild Application Notes /
(app note added 6/06) |
|
Phase Modulated Pwm Topology With The Ml4818 / An-42026 - Pericom Semiconductor
App Note # 07)1 (app note added 02/05) |
|
Pi7c8150b Asynchronous Feature - Pericom Semiconductor Application Brief # 045
(app note added 02/05) |
|
Pi7c8152b; Asynchronous Feature - ….(circuit design added 08/08) |
|
Pic Diode Tester - (electronic circuit added 4/05) |
|
Pic Micro To Isa Bus Interface - (design circuit added 8/02) |
|
Pic Project #1 Rs-232 To I2c Interface - Microchip Application Note Published
29-Nov-05 (app note added 2/06) |
|
Pic16cr Rom Code Submission - (circuit added 7/02) |
|
Pic16f84 Debugging Terminal - (circuit / schematic design added 6/06) |
|
Pic16f84 Miniature Real Time Controller - (circuit / schematic design added 6/06) |
|
Pic16f84 Programmer - (schematic / circuit design added 9/02) |
|
Pic16f84 Serial I/O Expander With Picbasic - (electronic design added 6/07) |
|
Picall And P16pro Pics Programmers - Microchip Application Note Published
26-Jul-00 (app note added 2/06) |
|
Picmicro Mcu As An Ieee 1451.2 Compatible Smart Transducer - how to get sound from
computer to Telephone line (added 4/02) |
|
Playing A Mac Through A Standard Telephone Line - 10/17/02 EDN Design Ideas
/ (added 1/05)The PLD (programmable-logic-device) code in Listing 1 implements a
pc-board-level revision-detection system that detects whether PLD pins are shorted
together on a PC board. It is often advantageous to field a single PLD programming
file that works for several generations of physical hardware. The PLD ...... |
|
Pld Code Reveals PC Board Revisions - 10/27/94 EDN Design Ideas / (added
11/05) |
|
Pld Implements Fast Four Phase Clock Generator - Microchip Application Note
Published 26-Aug-97 (app note added 2/06) |
|
Pld Replacement - 01/19/95 EDN-Design Ideas / (added 11/05) |
|
Pld Solves Rs 232c Compatibility Problem - 06/23/94 EDN Design Ideas /
(added 2/06) |
|
Plds Eliminate Isa PC Board's Jumpers - 03/31/94 EDN Design Ideas / (added
2/06) |
|
Plds Implement Delay Lines - 06/09/94 EDN Design Ideas / (added 2/06)
|
|
Plds Substitute For Obsolete LaTChes - 12/17/98 EDN-Design Ideas / (added
2/06) In minimum-shift-keying (MSK) signaling, two frequencies that
differ by the bit rate represent a one bit and a zero bit. Normally, the frequency
shift occurs at the peak of a cycle, so that neither the amplitude nor the slope of
the waveform shows a discontinuity..... |
|
Pll Forms Simple Msk Demodulator - 01/04/96 EDN-Design Ideas / (added 2/06) |
|
Pll Ic Forms Simple Digital Phase Shifter - (07/16/98 EDN-Design Ideas /
(added 2/06) |
|
Pll Synchronizes Power-Supply Ic - ….(circuit design added 08/08) |
|
Ponyprog Circuit For Atmel's Avr - ….(electronic schematic added 08/08) |
|
Ponyprog Circuit For Avr & Pic16f85 - (circuit added 7/02) |
|
Port Interface (Aaron Cake) - Fairchild Application Notes / (app note added 6/06) |
|
Power Factor Correction Pfc Basics / An-42047 - Microchip Application Note
Published 19-Nov-04 (app note added 2/06) |
|
Power Management For Pic18 USB Microcontrollers With Nanowatt Technology - DN338
Design Notes (Linear Technology) (app note added 1/06) |
|
Power Over Ethernet Isolated Power Supply Delivers 11.5w At 90% Efficiency -
Application Note 6 from Microsem (app note added 6/06) |
|
Power Solutions For Flexible Motherboards An-6 - DN130 Design Notes (Linear
Technology) (app note added 2/06) |
|
Power Supplies For Subscriber Line Interface Circuits - The charger in this
project is designed to charge two AA NiMH or NiCd cells of any capacity (as long as
they are the same) at about 470mA. It will charge 700mAh NiCds in about 1.5 hours,
1500mAh NiMHs ….(added 05/08) |
|
Powered Aa Nimh And Nicd Battery Charger - (application / block diagram added
6/07) |
|
Powered Speakers - 11/07/96 EDN-Design Feature Although best known for high
performance, the PowerPC family adds a new dimension to embedded-system
development.—Jim Challenger, Software Development Systems |
|
Powerpc's On-Chip-Debug Features Alter Embedded Development - National
Semiconductor Application Note 05 Oct1998 / (app note added 5/02) |
|
Practical Limits Of Rs485 - 04/15/04 EDN Design Ideas / (added 1/05)
Most designers make level shifters with op amps and 1%-tolerance discrete resistors.
Discrete-resistor mismaTChing limits the op amp's CMMR (common-mode rejection ratio)
to 40 dB, so you cannot use op amps in circuits that require high CMRR. Differential
amplifiers.... |
|
Precision Level Shifter Has Excellent Cmrr - 06/10/04 EDN Design Ideas /
(added 1/05) When you need a precision peak detector, you would usually
implement it with one or several op amps and a few other associated components. This
technique usually works well unless your design requires operation higher than a few
kilohertz. |
|
Precision Peak Detector Uses No Precision Components - 08/02/01 EDN Design Ideas
/ (added 1/05) Rotary encoders usually provide quadrature pulses that
indicate both the amount of rotation and the direction (Figure 1). A microcontroller
can calculate the rotation direction and keep track of angular movement. Many
microcontrollers' interrupt inputs, such as those on the Zilog Z86C90, can detect only
a falling edge.... |
|
Preprocessor For Rotary Encoder Uses Pal - This project's purpose is to design a
fully automated machine for drilling a printed circuit board, (PCB) blank at a minimum
cost and with the minimum amount of custom machining. This low cost philosophy is
achieved by adapting the existing mechanical assemblies from readily available
computer peripherals and electronic measuring instruments. Drill data is transferred
to the PCDrill from an Excellon drill file generated by a PCB CAD program running on a
personal computer. ….(design added 11/08) |
|
Printed Circuit Board Drill - (electronic schematic / circuit added 11/05) |
|
Printer Emulator Adapter - (electronic circuit added 4/05) |
|
Printer Port Activates Cmos switches - ….(electronic schematic added 06/09) |
|
Printer Port Adc - 12/19/96 EDN-Design Ideas / (added 11/05) |
|
Printer Port Controls A/D Conversion - 10/26/95 EDN-Design Ideas / (added 11/05)
|
|
Printer Port Controls Amplifier's Gain - 08/01/96 EDN-Design Ideas /
(added 11/05) |
|
Printer Port Controls Video Multiplexer - 06/09/94 EDN Design Ideas / (added
11/05) |
|
Printer Port Data Appears As Bar On PC Screen - 02/02/02/95 EDN-Design Ideas /
(added 11/05) |
|
Printer Port Hosts Precision Analog I/O Board - I had two computers, a Mac Mini
and a generic Windows computer. Both were on different networks, but in the same room,
and I wanted to share a Lexmark USB laser printer between the two of them. I ended up
making this switch to share the printer between the two computers....(schematic /
circuit added 6/07) |
|
Printer Sharing switch - ….(circuit design added 08/08) |
|
Producing Your Own Decrypt Viewing Card Mk2 - 06/05/97 EDN-Design Ideas / (added
11/05) |
|
Program Converts Temperature From Rtd Sensor - 10/26/95 EDN-Design Ideas / (added
11/05) |
|
Program Designs Single Supply Op Amp Circuits - 02/02/02/95 EDN-Design Ideas /
(added 11/05) |
|
Program Flags Dangerous Dos Commands - 12/19/96 EDN-Design Ideas / (added 11/05)
|
|
Program Generates Braille Dot Code - 09/14/95 EDN-Design Ideas / (added 11/05)
|
|
Program Helps Convert Orcad Libraries - (07/20/95 EDN-Design Ideas / (added 11/05) |
|
Program MaTChes Filter Network Impedances - 02/01/01 EDN-Design Ideas / (added
11/05) |
|
Program Predicts Vswr MismaTCh Rf Uncertainties - 03/02/98 EDN-Design Ideas
/ (added 11/05) |
|
Program Provides Integer-To-Binary Conversion - 09/28/95 EDN-Design Ideas /
(added 11/05) |
|
Program Provides Isa Bus Dll For Windows #1 - 05/09/96 EDN-Design Ideas / (added
11/05) |
|
Program Provides Isa Bus Dll For Windows #2 - Notice that the schotty diode allows
the DIY Programmer to feed its VCC without its VCC being shorted to the PIC's normal
power supply. A tiny DIP switch will also work in place of the diode. NOTE: the diode
is very convenient when developing the code, but it drops about 100mV of the VCC
provided (but was never an issue in my....(design added 6/07) |
|
Programmer Hardware Tester - AN-613 Analog Devices Application Note
(app note added 6/06) |
|
Programming The Automatic Fan Speed Control Loop - MicroNote 121 from Microsem
(app note added 6/06) |
|
Protecting Data I/O Ports With TVsarrays - MicroNote 117 from Microsem (app
note added 6/06) |
|
Protecting USB Data I/O Ports - Microchip Application Note Published 4-May-04
(app note added 2/06) |
|
Ps/2® To USB Mouse Translator - This is a reader/writer for memory cards of the
PlayStation, with PC's perallel port. (added 10/05) |
|
Psm Reader/Writer - 03/28/96 EDN-Design Ideas / (added 2/06) |
|
Pulse Modulated Interconnect Cuts Pld Pinouts - (electronic circuit added 4/05) |
|
Push Button switch Debouncer - I noticed allot of people like to use the 7V fan
mod, this is fine I suppose but it is very inefficient, and it doesn't allow for RPM
monitoring. I have Built a fan controller out of fairly cheap and readily available
parts that is extremely efficient, reliable and doesn't endanger your computers PSU.….(electronic
schematic added 06/09) |
|
PWM Fan Controller - Microchip Application Note Published 26-Aug-97
(app note added 2/06) |
|
Questions And Answers Concerning Serial Eeproms - This circuit is a modified
version of an original interface on QSL Net. It is a fully isolated interface allowing
computer control of the Trio/Kenwood R5000 receiver. Separate software is needed to
control the receiver. (added 10/05) |
