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Microprocessor Circuits
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Microprocessors: #'s
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Last Updated on:
Monday, October 03, 2011 06:07 PM |
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Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
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+/-5V Power Supply Operation with TC7106A/7107A TC7106A/7107A -
Microchip Application Note Published 12-Nov-02 (app note added 2/06)
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µC Acts as Dedicated Motor-control - 09/11/98 EDN-Design
Ideas....Motion-control systems often use a PWM signal to control the duty
cycle for a motor driver or amplifier module. Typical designs generate the
PWM signals using….….Please scroll to find this circuit.… [Design Idea by
[Dylan Horvath, Gecko Sysytems Inc, Austin, TX] |
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µC Based Circuit Performs Frequency Multiplication - 27-May-99 EDN-Design
Ideas....The traditional frequency multiplier requires many elements a
phase comparator to detect the phase error between the input and the output
signals, a lowpass filter to convert the phase error....[Design Idea by
Yongping Xia, Teldata Inc, Los Angeles, CA] |
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µC controls charge pump as background task - 1-Aug-97 Issue of EDN
Because of power consumption and cost, designers of battery-powered devices mainly
choose components that run at 3V or lower. Unfortunately, many devices operate only at
5V, including LCDs with built-in drivers, programming lines of many EEPROMs and flash
chips, and CMOS ADCs....[Design Idea by Carlos Cossio, Santander, Spain] |
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µC Controls Digital Potentiometer - 10/08/98 EDN-Design Ideas....Many
digitally controlled potentiometers (for example, the LM1971/02/3 from National
Semiconductor, www.national.com]incorporate a three-wire serial digital interface,
using data, clock, and enable lines. In Figure 1, the potentiometer's nomenclature for
these lines is Data-In....Several circuits in article, scroll to f ind this one.
[Design Idea by Lukasz Sliwczynski, University Of Mining And Metallurgy, Krakow,
Poland] |
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µC detects transmission rate of RS232 interface - 09/30/99 EDN-Design
Ideas....RS-232 is the most common serial interface in the PC world. Most RS-232
interfaces communicate with the receiver at a fixed transmission rate, such as 9600
baud. But what happens if the transmitter operates with different transmission rates?
Different transmission rates....[Design Idea by Thomas Schmidt, Microchip Technology,
Chandler, AZ] |
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µC forms FM oscillator - 10/28/99 EDN-Design Ideas....A project required an
inexpensive oscillator whose frequency increased step by step from 200 to 400 Hz and
then decreased to 200 Hz. The first step was to design a VCO with a staircase driver.
However, this approach entailed at least four ICs and many discrete components.
An....[Design Idea by Abel Raynus, Armatron International, Melrose, MA] |
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µC generates a frequency burst - 02/03/00 EDN-Design Ideas....Pulse-sonar
applications require generating bursts of a given frequency, duration, and repetition
rate. Traditionally, burst generator comprises a crystal oscillator with pulse
modulation. But easiest and cheapest way to generate bursts is by using an
inexpensive 8-bit µC, such as 68HC705KJ1 and 68HC7051A (Motorola]....[Design
Idea by Abel Raynus, Armatron International, Melrose, MA] |
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µC implements Pushbutton Light Dimmers - 06/18/98 EDN-Design Ideas....A
project required building a synchronous-demodulator circuit to track a line drawn on
paper. beauty of synchronous-modulator/demodulator approach is its
inherent noise rejection. method rejects ….File contains several circuits,
scroll to find this one....[Design Idea by William Grill, Riverhead Systems,
Littleton, CO] |
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µC makes inexpensive sine-wave generator - 12/17/98 Issue of EDN You
can use A/D converters or external, controllable oscillators to generate sine waves
from low-power, low-cost µCs. However, these methods add cost, reduce reliability,
increase circuit and software complexity, increase power consumption, and increase
overall size. Alternatively....Page includes several designs. Scroll to find
this one....[Design Idea by Jorge Luis B Romeu, IdeaWorks LTD, Syracuse, NY] |
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