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Microprocessor Circuits
Microprocessors:  #'s - B      C - F      G - K      L - M      N - P      Q - S      T - Z


Last Updated: October 24, 2017 02:55 PM

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

Choosing the Right 1-Wire® Master for Embedded Applications -  App Note 4206-- 3/27/2008 --  (add 5/08) __ Maxim Integrated

Circuit & Arduino sketch for interfacing to a DS18B20 1-wire temperature sensor -  Microcontroller based electronic circuit

Circuit & Software Provide Accurate Recalibration for Baseline PIC Microcontroller’s Internal Oscillator -  05/01/08  EDN-Design Ideas - A simple circuit and an assembly-language program allow you to recalibrate the internal oscillator of a PIC microcontroller __ Circuit Design by Noureddine Benabadji, University of Sciences and Technology, Oran, Algeria

Circuit controls ratiometric or simultaneous power-up of multiple rails -  13-May-04 EDN-Design Ideas - Many applications use FPGAs, ASICs, or DSP chips, which usually require multiple voltage rails, typically two  the core voltage and the I/O voltage.  The core voltage is usually lower than the I/O voltage.  Guidelines for determining how to power up two orvoltage rails depend on the part and the manufacturer you use __ Circuit Design by Dirk Gehrke, Texas Instruments, Freising, Germany

Circuit Controls Two LEDs with One Microcontroller Port Pin -  Microcontroller port pins can typically be driven either high or low, or else be put into an input or high-impedance state.  This circuit uses the three states to drive two separate LEDs with one port pin.  This can be very useful when __ Designed by Spehro Pefhany

Circuit for Measuring Motor Speed Uses Low-Cost Components -  11/08/07  EDN-Design Ideas - A microcontroller-based circuit provIdeas both an LCD readout and an analog motor-speed output __ Circuit Design by R García-Gil, J Castelló, and JM Espí, Escola Tècnica Superior d’Enginyeria, University of Valencia, Spain

Circuit for Soft-Start Module -  Simple circuit that reduces surge current on start of an induction motor __ Designed by Wichit Sirichote

Circuit Monitor 2 -  PIC Project  This is a circuit monitoring device.  It runs for over 10 days and can log up to 32k events both digital and analog.  Samples are logged either on a timing basis  (.01 to 2.5 seconds) , or on a triggered basis.  Four inputs are provided, up to three of which can be analog __ Designed by Luhan Monat - Mesa Arizona

Circuit programs Atmel AVR microcontrollers -  30-Mar-00 EDN-Design Ideas - 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 __ Circuit Design by Guo-Yin Xu, XuMicro, Houston, TX

Circuit provides 4- to 20-mA loop for microcontrollers -  05/27/04  EDN-Design Ideas - The 4- to 20-mA current loop is ubiquitous in the world of controls in manufacturing plants.  Discrete logic, microprocessors, and microcontrollers easily cover the digital portions of control schemes, such as limit switches, pushbuttons, and signal lights.  Interfacing a 4- to 20-mA output to a rudimentary microcontroller can be problematic __ Circuit Design by Robert Most, Dow Corning Corp, Auburn, MI

Circuit provides watchdog for microcontrollers -  12/26/02 EDN-Design Ideas - 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 __ Circuit Design by VM Holla, Bangalore, India

Circuit translates a law to m law -  05/07/98 EDN-Design Ideas -  (NOTE : contains several ideas, scroll down)  Two common methods exist to compand voice for transmission through a PCM channel.  In Europe, A law involves converting a 12-bit input signal to an 8-bit encoded output.  In the US, m law involves encoding 13 bits to 8 bits.  You can use a translator to convert from A law to m law  (Figure 1) .  The converter is asynchronous and requires only an 8-bit A law input to provide an 8-bit m law output. __ Circuit Design by Rolando Herrero, Instituto Tecnológico de Buenos Aires, Argentina

Clock Controller using AT89C2051 -  The Clock Controller V1.1was designed to be an exemplary of using 'C' language to control timer0interrupt, 7-segment LED and keypad scanning.  It provides 1-bit sink currentdriving output, for driving a relay, opto-TRIAC, say.  Many projects requiring7-segment display and keypad interfacing may get the idea from the Clockcircuit and software.   __ Designed by Wichit Sirichote

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 __ Designed by The hardware was Richard Ottosen, and the firmware was Eric Smith

Cockroach Zapper -  Using a PIC for this device provides a lot of useful functionality.  The timing for the power pulse to the inductor is critical to getting the best Zap from your nine volt battery.  The longer the current is on, the higher the voltage.  Once the inductor reaches saturation, however, you are just waisting power.   __ Designed by Luhan Monat-Mesa Arizona

Coherent Sampling vs. Window Sampling -  App Note/ 1040 / Sep-04__ Maxim Integrated

Color Organ -  This is a simple, one lamp colour organ.  It is far less complicated then the Three Channel Colour Organ.  It is simply a lamp controlled by an SCR.  It can be built in a few minutes, and combined with other circuits to make some pretty neat effects.   __ Designed by Aaron Cake

Color Organ -  PIC Project  This unit uses a PIC16F84 with an 8 bit A/D.    The signal from both stereo channels is combined and digitized.    Each of 5 frequency bands is processed using a 16 point FFT.    Then the level of each channel is output as PWM  (pulse width modulation) to a set of solid state relays __ Designed by Luhan Monat - Mesa Arizona

Colour (Sound) Organ -  This is a simple, one lamp colour organ.  It is far less complicated then the Three Channel Colour Organ.  It is simply a lamp controlled by an SCR.  It can be built in a few minutes, and combined with other circuits to make some pretty neat effects.   __ Designed by Aaron Cake

Colour Bar Generator -  I started this project 3 weeks ago, because I was wondering " is that possible, some AVR MCU to create simple colour bars? " At the beginning, I  believed that it's easy.  So, I asked some people who knew more about PAL composite video signal.  The first idea was to work with 8.867238 MHz crystal    (2 times the color carrier) .  When I read about PAL video composite signal creation, I saw that if you want to product colors entire-in-software you must create the color-carrier    (4.43 MHz) , changing 4 times the phase of color-carrier    (one time for each color) , to show 4 colours.  Except that, you have to change the color-burst from 135 deg to 135+90= 225 deg. __ Designed by Vassilis Serasidis; Improved Zdenek Zechovsky

Colour Maximite Microcomputer, Pt.1 -  The original Maximite microcomputer  (March-May 2011) has been a huge hit with readers and thousands are now in use all over the world, from Australia to Russia.  So how do you improve on such a big hit? How about by adding eight vibrant colours and a stereo music synthesiser for a start? The result is stunning and it takes the Maximite to a whole new level.__ SiliconChip

Colour Maximite Microcomputer, Pt.2 -  Building the unit and using its new sound & colour features__ SiliconChip

COM Port Laser Turret -  Steer a laser turret from your PC.

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Microprocessors:  #'s - B      C - F      G - K      L - M      N - P      Q - S      T - Z


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