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Digital  / Logic Circuits   Page 4c
Digital or Logic Circuits:  #'s    A     B     C     D     E - F     G - H
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Last Updated on:
Wednesday, November 29, 2017 05:38 AM



Circuits Designed by Dave Johnson, P.E. :
  • C-MOS INVERTER MAKES LOW POWER AMP
    With the addition of one resistor and a capacitor, some common logic ICs can be transformed from digital to analog duties.  This circuit outlines some the features to expect from different inverter ICs.
  • CIRCUIT FORMS DIVIDE BY 1.5 COUNTER
    Two inexpensive ICs divide a TTL clock signal by 1.5. By following the circuit with another flip/flop, you could also generate a divide by three function.

Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
CN-4: The COP444l Evaluation -  National Semiconductor Application Note  (app note added 2/06)
CN-5: Oscillator Characteristics of COPS MicroControllers -  National Semiconductor Application Note  (app note added 2/06)
CN-6: TRIAC Control using the COP400 MicroController Family -  National Semiconductor Application Note  (app note added 2/06)
Code Development for the PIC16c52 -  Microchip Application Note Published 26-Aug-97  (app note added 2/06)
Coding Schemes for Mixed Signal Communication -  Microchip Application Note Published 18-Jul-01  (app note added 2/06)
Combination Digital Lock -  A multiple input combination loack using CMOS counter IC's. Flexibility and code change is allowed by changing output connections…. [Circuit designed by Andy Collison]
Combination Lock PIC16F84 -  (schematic / circuit added 11/03)

Communicating with the MCP3221 using Picmicro® MicroControllers -  Microchip Application Note Published 2-Aug-02  (app note added 2/06)
Comparing can & Ecan Modules -  Microchip Application Note Published 5-Mar-04  (app note added 2/06)
Comparison of Low End 8 Bit MicroControllers -  Microchip Application Note Published 26-Aug-97  (app note added 2/06)
Compass Schematic -  (electronic diagram added 6/03)
Configuring the TMC22x5y to Pass Closed Caption Data/ AN-52 -  Fairchild Application Notes / (app note added 6/06)
Connecting a Picmicro® MicroController to a Standard Analog Telephone Line -  Microchip Application Note Published 21-Aug-02  (app note added 2/06)
Connecting LED to PIC Micro I/O Pins -  So, you’ve got a great idea for a project using a PICmicro microcontroller and you want to use at least one LED in your project as a power indicator. Or, maybe, you’ve set out to design a bar-graph voltmeter with eight LEDs,.....(app note added 11/03)
Connecting PIC12c508 8 to 93AA46 Serial Eprom -  (schematic / circuit added 11/03)
Control 120 Volt AC Relay with TTL -  ASCII format (circuit / schematic design added 6/06)
control room light intensity -  11/11/04 EDN-Design Ideas.....Many people favor different light and temperature settings for different rooms depending upon their mood or whether they are working or relaxing. The circuit in Figure 1 controls the intensity of the artificial light in a room and monitors the temperature of two zones. The two main circuit blocks are the PIC16C67 master controller and the ADT7516 temperature-sensor interface, which includes a..... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
Converting from 8051 to Microchip Assembler: A Quick Reference -  Microchip Application Note Published 8-Oct-03  (app note added 2/06)
Converting from Motorola® Hc08 to Microchip Assembler: A Quick Reference -  Microchip Application Note Published 9-Jul-03  (app note added 2/06)
Converting Light to Digits: LTC1099 Half-Flash 8-Bit A/D Converter Digitizes Photodiode Array -  AN33 Linear Technology  This application note describes a Linear Technology "Half-Flash" A/D converter, the LTC1099, being connected to a 256 element line scan photodiode array.  This technology adapts itself to handheld (i.e., low power) bar code readers, as well as high resolution automated machine inspection applications.....[App Note]
Convolution Digital Signal Processing -  National Semiconductor Application Note  (app note added 2/06)
COP444l Evaluation -  National Semiconductor Application Note  (app note added 2/06)
Correlating software & analog outputs in a CAN Controller -  Agilent Application Note.....[App Note]
Correlator works in Presence of Noise -  02/03/94 EDN-Design Ideas.....Clipped-signal Correlator outperforms any resistor-capacitor clipped-signal Correlator, and the circuit has no race paths..... [Design Idea by John Charlton,  Lancaster, CA]
CRC Generating & Checking -  Microchip Application Note Published 22-May-00  (app note added 2/06)
Creating a Multitasking Kernel for the COP8 MicroController -  National Semiconductor Application Note  (app note added 2/06)
Credit Card Reader using PIC12c509 -  Microchip Application Note Published 28-Oct-99  (app note added 2/06)
Cross Plot Generator Allows Quick A/D Converter Evaluation -  AN-101 Analog Devices Application Notes  (app note added 2/06)
Crowbars & Clamps -  MicroNote 106 from Microsem Reviews the major differences including the low on-state voltage of the crowbar and the ease of transition from conduction to non-conduction for the clamp. Trade-offs and applications are discussed. (app note added 6/06)
Current-Limit Switch Is Digitally Programmable -  Current-limit switches are virtually ubiquitous in system controls. They provide a safe means for regulating the current delivered to a load circuit. The switches allow the load current to increase to a programmed limit but no higher.  This application note illustrates the implementation of a digitally programmable current-limit switch using MAX890L a current-limited, high-side P-channel switch and MAX5160 digital potentiometer.....[Maxim Application Note 298
Current-source is Nonvolatile -  05/07/02 EDN-Design Ideas.....Digitally programmable current sources that feature automatic trimming and retain the setting despite power-down cycles are useful in applications such as RFand laser-communications drivers. The circuit in Figure 1, for example, is particularly suited for setting the drive current for the optical pump in widely tunable VCSELs (vertical-cavity surface-..... EDN is migrating links. This link is not verified.  Google the "title" EDN for new link.
Customize Digital Modulation with the Esg-D Series Real-Time I/Q Baseband Generator, Option Un8 -  Aligent Application Note  (app note added 6/07)
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Digital or Logic Circuits:  #'s    A     B     C     D     E - F     G - H
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