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

Last Updated: December 29, 2017 03:15 AM

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

Microcontroller Watches, Controls AC Power - 06/22/95 EDN-Design Ideas - Circuit allows an isolated microcontroller to both sense and control ac power to an externally plugged-in device - For monitoring and controlling a power circuit from a microcontroller  (µC) , Fig 1 replaces the conventional technique of a low-value resistor and differential amplifier  (with gain set for the expected current value) .  A control line turns TRIAC Q1 on and off via optoisolator IC2.  When an appliance is plugged into J1 and turned on, the voltage drop across Q1 is independent of the current value and sufficient to turn on optoisolator IC3.  The phototransistor current of IC3 charges C1to a logic 1, which is sensed by the µC.   __ Circuit Design by Samuel Kerem, Infrared Fiber Systems, Silver Spring, MD

Microcontroller, JFET form low-cost, two-digit millivoltmeter - 06/22/06 EDN-Design Ideas - Software subroutines replace hardware A/D converter __ Circuit Design by Noureddine Benabadji, University of Sciences and Technology, Oran, Algeria

Microcontroller-based 4-digit Counter Modules - Two simple low cost counter modules.__ SiliconChip

Microcontroller-Based Clock using Ds1307 - Digital wall clocks, table clocks and desk clocks with pointer or LCD display are readily available in the market.  Here we present a clock that can be built in a small...__ Electronics Projects for You

Microcontroller-Based DC Motor Controller - Motion control plays a vital role in industrial automation.  Manufacturing plants in industries like chemical, pharmaceutical, plastic and textile, all require motion control.  And it may be a flat-belt application, flow...__ Electronics Projects for You

Microcontroller-Based Morse Code Encoder - Morse code is a method of transmitting textual information as a series of on-off tones, lights or clicks that can be directly understood by a trained listener without using any special...__ Electronics Projects for You

Microcontroller-Based Moving Message Display - LED-based moving-message displays are becoming popular for transmitting information to large groups of people quickly.  These can be used indoors or outdoors.  We can find such displays in areas like railway...__ Electronics Projects for You

Microcontroller-Based Ring Tone Player - Mobile phone ring tones sound like real audio recordings.  It’s not because of the way the melodies are composed, but the protocol behind playing the melody.  The ring tone text transfer...__ Electronics Projects for You

Microcontroller-Based Serial Data Transfer to Pc - Communication from or to a computer has become almost essential in our day-to-day lives.  Though we can execute many programs within a computer itself, it will not be of much use...__ Electronics Projects for You

Microcontroller-Based Solar Charger - As the sources of conventional energy deplete day by day, resorting to alternative sources of energy like solar and wind energy has become need of the hour.  Solar-powered lighting systems are already...__ Electronics Projects for You

Microcontroller-Based Speedometer-Cum-Odometer - Normally, digital speedometers are found only in luxury cars and high-end motorbikes.  Even if your motorbike has a mechanical speedometer, what will you do when it gets damaged? First, you need...__ Electronics Projects for You

Microcontroller-Based Tachometer - A tachometer is nothing but a simple electronic digital transducer.  Normally, it is used for measuring the speed of a rotating shaft.  The number of revolutions per minute  (rpm) is valuable...__ Electronics Projects for You

Microcontrollers Can Be a Snap - Thanks in no small part to the SILICON CHIP promotion over the last five years, popular and cheap PICAXE micros are widely now considered the best value educational microcontroller.  However, motivated pre-teens and fuzzy-eyed seniors who are "keen to learn about micros" may find PICAXE PC board soldering or breadboard circuit assembly too fiddly.  So here's a nifty approach that fits a PICAXE-08M micro-controller into the gutted sound module from a colourful "Snap Connector" electronic kitset.__ SiliconChip

Microcontroller's DAC provides code analysis - 04/14/05 EDN-Design Ideas - Scope plus DAC gives insight into software code __ Circuit Design by Dave Bordui, Cypress Semiconductor, Heathrow, FL

Microcontroller's single I/O-port line drives a bar-graph display - 07/06/06 EDN-Design Ideas - Bar-graph display spares processor I/O lines __ Circuit Design by R Jayapal, PhD, Bharat Heavy Electricals Ltd, Trichy, India

Microcontroller-Temperature Measurement Uses Only a Diode & a Capacitor - 12/05/08  EDN-Design Ideas - Discharging a capacitor through the reverse leakage of a PN junction allows you to measure ambient temperature.  Using a PN-junction diode for temperature measurement usually depends on its 2‑mV/K temperature  coefficient.  Conventionally, you must amplify and digitize this voltage with an ADC before you can use the value in a microcontroller.  Less well-known is the fact that the reverse current of a PN-junction diode shows a good exponential dependency over temperature; increasing the temperature by approximately 12K doubles the leakage  (Figure 1) .  An easy way to measure current over such a large range of two to three decades is to charge and discharge a capacitor and measure the time or frequency __ Circuit Design by Andreas Grun

MICRO-DIC - E - The Micro_Dice is a simple introduction to the PIC microcontroller.  This schematic will produce a random number on the led display in a dice pattern.  It is simple to construct.  When constructing you can select either fast roll or slow roll option.  

Microphone preamplifier using an LM321 for interfacing an electret microphone to Arduino - This micro-project is intended as an add on to an microprocessor based  (Arduino) Scope / Audio Analyser.  It has a gain of ~ 100 and uses a standard opamp.  Inspired by Tobi Delbruck's lecture. __ Designed by Alexander C. Frank, aka Ajarn Changpuak

Microprocessor based home security systE - M - In this advance world security system is in high end so the security breakers are.  Now it’s time to live free, live secure.  By keeping these all thing in mind  (problem from burglary) the innovative group dreamlover technology designed a microprocessor based project “Microprocessor-Based Home Security System”.  This advance security system not only let you know but also alert police immediately.

Microprocessor Core Supply Voltage Set by I2C™ Bus Without VID Lines - DN279 Design Notes__ Linear Technology/Analog Devices

Microprocessor generates programmable clock sequences - 05/12/05 EDN-Design Ideas - Imulate radar and sonar returns with simple circuit __ Circuit Design by William Grill, Honeywell BRGA, Lenexa, KS

Microprocessor linear potentiometer Deliver echo pulses - 05/12/05 EDN-Design Ideas - Simulate radar and sonar returns with simple circuit __ Circuit Design by Abel Raynus, Armatron International Inc, Malden, MA

Microprocessor RS-232 Reset - This circuit allows a remote microprocessor to be reset by a controlling host over a remote RS-232 or similar protocol serial line.  With the use of a program loader on the remote host, a program may be downloaded and run.  This allows a target processor to run different code in RAM, thus getting rid of the need to burn multiple EPROMs.  The circuit is usually used for developing code on a target processor, but it can also be used for permanent applications where the target program lives on a host system's disk __ Designed by G. Forrest Cook

Microprocessor supervisor & regulator form in-range voltage Monitor - 10-Jun-04 EDN-Design Ideas - Low-cost microprocessor supervisors reset controllers when power-supply voltages fall below given levels.  As added protection, you can also reset the microcontroller when the power supply is too high by combining a low-cost shunt-v __ Circuit Design by Ilie Poenaru and Sabin Eftimie, Catalyst Semiconductor, Bucharest, Romania

Microprocessor tool packages focus on specific applications - 04/01/99 EDN-Design Ideas - NOTE :  File contains many designs.   Scroll to this one.  As more IC designs move to 0.25-µm technology, EDA-tool vendors are responding with new software.  New to Europe is Simplex Solutions; Simplex’s tools let you perform full-chip extraction of parasitics and analysis of signal-integrity and power characteristics.  Version 2.0 of the VoltageStorm tool provIdeas a three-times increase of static and dynamic full-chip analysis of power-grid effects on a chip layout compared with the previous version. __ Circuit Design by Graham Prophet

Microprocessor using Xilinx FPGA - Schematic only __ Designed by Paul Stoffregen

Microprocessor, linear potentiometer Deliver echo pulses - 05/12/05  EDN-Design Ideas - Imulate radar and sonar returns with simple circuit __ Circuit Design by Abel Raynus, Armatron International Inc, Malden, MA

Microprocessor-based dual timer features four outputs - 9-Jun-05 EDN-Design Ideas - Simple code, switches yields two timers in microcontroller __ Circuit Design by Tito Smailagich, ENIC, Belgrade, Yugoslavia

Microprocessor's single-Interrupt input processes multiple external interrupts - 03/02/06 EDN-Design Ideas - Design works for most low-end microcontrollers __ Circuit Design by Abel Raynus

Micro-Spy with TTL - This circuit is old  (70's) but since the 74LS13 is from the regular 74xx series and easy to obtain, I decided to keep the circuit in place until components are no longer available.  Not much to tell here.  Performance is based on the 74LS13, a 'Dual 4-input Positive-Nand Schmitt Trigger'.  This circuit was experimental and so has no real purpose other than tinkering.   __ Designed by Tony van Roon  VA3AVR

MIDI generator - Control some MIDI device with ATtiny26.  The code can be convert it for any AVR family microcontroller  __ Designed by Vassilis Stergiopoulos

MIMO Wireless LAN PHY Layer (RF) Operation & Measurement Application Note 1509 - Application Note__ Aligent

Mini 3 digit display, an inexpensive digital voltmeter - We build a simple and inexpensive three digit display.  It's a voltmeter module but it has also general purpose digital IO pins.  You could use it as well to read a digital sensor and display the value.  It can be freely programmed, calibrated and even be programmed with a non linear formula.  It's a display where you can define the relation between the measured value and the displayed number.   __ Designed by Guido Socher

Mini dice-PIC10F200-based electronic dice - This project describes a PIC10F200-based electronic dice.  The reason I made this was that I had a small corner left over when ordering a panel with a couple of other PCBs and thought I would rather use the corner for something interesting than leave it unused, so I made a dice project.  The PCB is quite small, so it is hard to etch it yourself __ Designed by Collin Mitchell

Miniature power splitters - AN-10-002 App Note__ MiniCircuits.com

Miniature Real-Time Controller - My long history homeuse controller, a Miniature Real-time Controller controls night light, A/C, household appliances with programmable scheduler.  Modified source code and hex file for year 2002 readout.  New source code in c program.   __ Designed by Wichit Sirichote

MiniCal 5V Meter Calibration Standard - Check your DMM's accuracy with this!__ SiliconChip

Minilogger V1.0 - Build your own a personal data logger for recording analog signal.  The MiniLOGGER provides 8-channel analog input  (-99mV to +999mV) ,  __ Designed by Wichit Sirichote

Minilogger V3.0 - New design data logger board, 64kB T89C51RD2, 4-channal 12-bit ADC, built-in LCD and 128/512kB battery backup memory.   __ Designed by Wichit Sirichote

Minimize communication time between small microcontrollers - 03/29/01 EDN-Design Ideas - When designing a multicontroller system, it is convenient to organize the communication betweenµCs via one wire line.  Unfortunately, low-endµCs have no serial-interface capabilities like their more expensive counterparts.  Low-endµCs have no SCI  (serial-communication-interface, SPI  (serial-peripheral interface) , or SIOP  (simple serial-I/O port) .   __ Circuit Design by Abel Raynus

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

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