Digital / Logic Electronic Circuits, page 4

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Digital or Logic Circuits: #'s    A     B     C     D     E - F     G - H
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Last Updated on: Monday, October 03, 2011 06:07 PM

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:

Circuit Feeds CMOS Devices - 10/09/97 EDN-Design Ideas..... EDN is migrating links. This link is not verified. Search the "title" EDN for new link.

Circuit for measuring motor speed uses low-cost components - 8-Nov-07 Issue of EDN A microcontroller-based circuit provides both an LCD readout and an analog motor-speed output..... [Design Idea by R García-Gil, J Castelló, and JM Espí, Escola Tècnica Superior d’Enginyeria, University of Valencia, Spain]

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..... [Designed by David A. Johnson]

Circuit forms industrial-grade digital potentiometer - 20-Sep-01 Issue of EDN Both ac and dc motors in modern industrial systems often receive their control from PLCs (programmable-logic controllers] in a control room safely away from the process. If an operator must manually .... [Design Idea by Phill Leyva, Maxim Integrated Products, Sunnyvale, CA]

Circuit gang-programs EEPROMs over I2C bus - 13-Sep-01 Issue of EDN You use the fully controlled circuit in Figure 1 to parallel-program two-wire serial EEPROMs via the I2C bus. Gang programmers must address all memory devices during a write operation. To verify the memory contents, however, the system must address only one memory at a time during read operations..... [Design Idea by Denisa Stefan, Catalyst Semiconductor, Sunnyvale, CA]

Circuit programs Atmel AVR µCs - 30-Mar-00 Issue of EDN Atmel AVR mCs feature an enhanced RISC architecture that purportedly offer the highest MIPS-per-milliwatt capability in the 8-bit mC market. Figure 1 shows an easy-to-build AVR mC-programming circuit that can program the 40-pin AT90S4414/8515, the 20-pin AT 90S1200/2313,.....PDF has many circuits, scroll to this one..... [Design Idea by Guo-Yin Xu, XuMicro, Houston, TX]

Circuit Programs Atmel AVR MicroControllers - 03/30/00 EDN-Design Ideas EDN is migrating links. This link is not verified. Search the "title" + "EDN" for new link.

Circuit provides watchdog for microcontrollers - 26-Dec-02 Issue of EDN The watchdog circuit in Figure 1 uses a single NAND Schmitt-trigger IC. The circuit iscost-effective than dedicated, commercially available watchdog ICs. The circuit generates an active-high reset signal upon power-up and remains in a low state as long as the control input receives pulses. Whenever the pulsing at the control input stops, whether the circuit is in a high or a low state, th..... [Design Idea by VM Holla, Bangalore, India]

Circuit transmits ARINC 429 data - 11-Jul-02 Issue of EDN The ARINC (Aeronautical Radio Inc] 429 specification defines the air transport industry's hardware and protocol standards for the transfer of digital data between avionics systems. Circuitry that can implement elements of the 429 spec is often an essential part of control and sensor electronics intended for the aviation environment..... [Design Idea by Steve Woodward, University of North Carolina, Chapel Hill, NC]

CLC5526 Diversity Receiver Chipset - National Semiconductor Application Note (app note added 2/06)

CLC5902 Diversity Receiver Chipset - National Semiconductor Application Note (app note added 2/06)

CLC5956 Diversity Receiver Chipset - National Semiconductor Application Note (app note added 2/06)

Clearing the Software Write-Protect Feature on the 24lcs52 - Microchip Application Note Published 23-Feb-04 (app note added 2/06)

Clock - Scroll down to find link to circuit drawing and circuit explanation….....

Clock Design using the PIC16c54 for LED Displays & Switch Inputs - Microchip Application Note Published 26-Aug-97 (app note added 2/06)

Clock divider - .....

Clock Doubler for CMOS Logic - Exclusive OR gate (added 4/02)

Closed-Caption Decoder - This is a closed-caption decoder with serial output based on a Microchip PIC16F628A. The internal comparators of the PIC16F628A are used to implement a peak detector and data slicer..... [The hardware was designed by Richard Ottosen, and the firmware was written by Eric Smith]

CMOS IC Makes Low Cost Digital Potentiometer - 01/18/96 EDN-Design Ideas.....A growing trend in the design of electronic equipment is to replace analog knobs used to increase or reduce a continuous signal (such as volume or brightness]with "up" and "down" keys. However, replacing a low-cost analog potentiometer with a digital potentiometer can be costly. The low-cost circuit..... EDN is migrating links. This link is not verified. Search the "title" + "EDN" for new link.

CMOS 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. …. [Designed by David A. Johnson]

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