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Digital  / Logic Circuits   Page 11a
Digital or Logic Circuits:  #'s    A     B     C     D     E - F     G - H
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Last Updated on:
Saturday, June 27, 2009 04:42 PM

Circuits Designed by Dave Johnson, P.E. :
  • Poor Man’s Digital Counter Using Pedometer
    There are many occasions when you may want to count something electronically.  Perhaps it is car traffic on a street or items moving down an assembly line.  It might be the number of times a machine is activated or maybe you want to count the number of people entering doorway.  Commercial counting modules do exist but if you want to use something cheaper, you can modify a pedometer to do much the same thing....

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Passive Component Selection and Dynamic Modeling for the AD2S80 Series Resolver to Digital Converter:  AN-266 Analog Devices Application Notes  (app note added 2/06)

Passively Probing an InfiniBand System with an Agilent 16700 Series Logic Analysis System:  Agilent Application Note   (app note added 6/06)

PC Based Configurable Filter uses No Digital Potentiometers:  01/23/03 EDN Design Ideas  /  (added 1/05)  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 replace the resistors of the analog design with digital potentiometers, thus providing the necessary ......

PC Board Layout Checklist: DC-DC Converters / AB-11:  Fairchild Application Notes / (app note added 6/06)

PC Power Applications / AB-52:  Fairchild Application Notes / (app note added 6/06)

 

 

PC Power Applications / AB-53:  Fairchild Application Notes / (app note added 6/06)

PC100 Registered SDRAM Module Design:  Pericom Semiconductor App Note # 009 (app note added 02/05)

PC-Based Development Programmer for the PIC16C84:  Microchip Application Note Published 26-Aug-97   (app note added 2/06)

PCI Timing Check using the Agilent E2920 PCI Series Exerciser/Analyzer:  Agilent Application Note   (added 6/06)

Pericom Fct Logic for Hot-Plug Applications:  Pericom Semiconductor Application Note # 003 (app note added 02/05)

Phase Modulated PWM Topology with the ML4818 / AN-42026:  Fairchild Application Notes / (app note added 6/06)

PIC 5x7 Display:  (schematic / circuit added 10/02)

PIC ADC a Free PIC Based Intelligent A/D Converter:  (design circuit added 8/02)

PIC Based Motor Controller:  (circuit / schematic added 2/03)

PIC Controlled DDS VFo 0 to 6 MHz:  (circuit added 7/02)

PIC Digital Clock Timer:  (electronic (schematic / circuit added 11/05)

PIC ICD:  (electronic circuit added 4/05)

PIC Logic Probe with Pulser:  (schematic / circuit added 10/02)

PIC Micro to Isa Bus Interface:  (electronic circuit added 4/05)

PIC Programmer:  to download programs into PIC microprocessors. (added 7/03)

PIC Vacuum Fluorescent Display Interface:  (electronic circuit added 4/05)

PIC12c508 Night Light Saver:  (circuit added 7/02)

PIC12C509 Logic gate Replacement for Nitrogen Filler:  (circuit / schematic design added 6/06)

PIC14c000 A/D Theory and Implementation:  Microchip Application Note Published 26-Aug-97   (app note added 2/06)

PIC16/17 Oscillator Design Guide:  Microchip Application Note Published 26-Aug-97   (app note added 2/06)

PIC16c54a Emi Results:  Microchip Application Note Published 26-Aug-97   (app note added 2/06)

PIC16c57 Based Code Hopping Security System Application Note:  Microchip Application Note Published 29-May-97   (app note added 2/06)

PIC16c5x/PIC16cxx Utility Math Routines:  Microchip Application Note Published 26-Aug-97   (app note added 2/06)

PIC16f639 Microcontroller Overview:  Microchip Application Note Published 2-Dec-05   (app note added 2/06)

PIC16F84 Based Morse Code Reader:  (design circuit added 8/02)

PIC16F84 Debugging Terminal:  (circuit added 7/02)

PIC16F84 LED Chaser #2:  (electronic circuit added 4/05)

PIC16F84 LED Chaser:  (electronic circuit added 4/05)


 

Digital or Logic Circuits:  #'s    A     B     C     D     E - F     G - H
I - K     L     M - O     P     Q - R     S     T     U     V - Z

 

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