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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:

M Asim Khan's Programmer Ver 3.1 - Latest M Asim Khan's Programmer featuring more chips, enhance programming speed, support Window2000/XP.  New target chips, 87C51 and 87C52.   __ Designed by Wichit Sirichote

Macrovision removal - Schematic only, no circuit description

Mag Card Reader - The unit provides the magnetic head on a spring mechanism along with low level head signal amplifiers and data slicers.  Three signal lines coming from the unit provide card presence, clock, and data.  When actively reading a card, it draws about 50ma of current at 5 volts.   __ Designed by Luhan Monat - Mesa Arizona

Mains 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

Mains Moderator: Stepping Down the Volts - Do you have excessive mains voltage at your place? In some parts of Australia the mains voltage can be above 250VAC and that can spell early death for imported appliances rated to work on only 220VAC.  In this article we show you how to reduce the mains voltage to a safe level for your equipment.__ SiliconChip

Make a DAC with a microcontroller's PWM timer - 09/05/02 EDN-Design Ideas - Many embedded-microcontroller applications require generation of analog signals.  An integrated or stand-alone DAC fills the role.  However, you can often use PWM signals for generating the required analog signals.  You can use PWM signals to create both dc and ac analog signals.  This design idea shows how to use a PWM timer to simultaneously create a sinusoid, a ramp, and a dc voltage __ Circuit Design by Mike Mitchell, Texas Instruments Inc

Make noise with a PIC - 7-Aug-03 EDN-Design Ideas - Building a stable noise generator for audio-frequency purposes requires only a few components.  The circuit in Figure 1 relies on linear-feedback shift registers and some simple software.  An eight-pin Microchip (www.microchip.com] PIC12C508 controller (IC2] with a short program generates pseudorandom noise at its output pin, GP0 __ Circuit Design by Peter Guettler, APS Software Engineering GmbH, Cologne, Germany

Make Your Own Single-Side PCB for Easy-Downloader V1.1 - I am very happy with my student, Plermjai  (his name means feel delighted too) Inchuay  (his family name means angel helps him) , who provides me his page describing how-to-make a single side PCB for the Easy V.1.1.  So cool! his prototype was made by hand writing with a pen for making PCB! Available now single side with Protel format.   __ Designed by Wichit Sirichote

Make Your Own Single-Side PCB for Easy-Downloader V2.0 - This work was contributed by Bruno Macio from Brazil, a single-side PCB for Easy II with MAX232C for RS232 level converter.  For those who use Portuguese may ask him directly __ Designed by Wichit Sirichote

Making Boards - It is now rather easy to make your own single-sided printed circuit boards at home.  The total cost runs about 25 cents per square inch - board, chemicals, and all.   __ Designed by Luhan Monat - Mesa Arizona

Manual Eprom Programmer - The programmer devices required for programming the electrically programmable read only memories  (EPROMs) are generally expensive.  Here is a low-cost circuit to program binary data into 2716 and 2732 EPROMs.  The circuit...__ Electronics Projects for You

Mars Clock - What do you do if you have a spare LCD module with backlight, a weird 16 button keyboard, and a PIC16F877A microcontroller gathering dust? A monster Martian Clock immediately springs to mind.  You are probably thinking There __ Designed by alex a avtanski.com

MarshmalLow Bazooka - This device uses a PIC12F615 to implement a capacitor discharge ignition system.  When the switch  (button) is closed, the PIC sends pulses to the IRF644 MOSFET creating high voltage pulses to charge the 1.0 uf/250 volt capacitor.   __ Designed by Luhan Monat-Mesa Arizona

Mathematical Manipulation Of Pure Sine Wave Inverter using ATMEL 89S2051 - Didik Rostyono and Harsono Hadi explain how to produce the sinewave output inverter using the ATMEL microcontroller!  (available only in pdf file  (274kB) , click the link to download it)  __ Designed by Wichit Sirichote

Matrix Display using PIC 16F628 - Config: WDT Off, TIMER On, OSC Internal RC, MCRL Off, LVP Off The Display is an array of 5x24 Leds.  I used Shift registers to light up every column, DO NOT USE ANY 74LSXXX TTL.  The 74LS is a Low Power TTL that doesn't light up the LEDs very well.  Use the 74HCXXX series or 74FXX series.  After almost 2 weeks sleeping only 5 hours every night, the circuit is working.  Is hard to get a picture while the display is scrolling the message.  This LED Display allows up to 128 Characters, Just write your message in the EEPROM Data and it will be displayed.  If the Display is "blinking", 

Max-038 Signal - The Max-80 function gernerator IC is specified to work to 20 MHz.  So far, this unit works nicely to 50KHz.  Since I seldom need signals higher than that, it has taken up a happy.)  __ Designed by Luhan Monat - Mesa Arizona

MAX186 ADC Project - Interfacing the MAX186 8 Channel ADC to the BSII to measure analog voltages.  Very useful considering most sensor out today puts out a voltage.  The MAX186 can measure up to 8 different voltages and only takes 3 I/0 pins.   __ Designed by Shaun Wilson

MAX2606 VHF FM Transmitter - If you want to be independent of the local radio stations for testing VHF receivers, you need a frequency-modulated oscillator that covers the range of 89.5 to 108 MHz but building such an oscillator using discrete components is not that easy.  

MCS08DZ60 Evaluation Board - NOTE : Must register on this site __ Designed by Published in Elecktor July/Aug, 2010

MCS-51 endows MicroLan-like protocol to UARTs - 05/07/98 EDN-Design Ideas - NOTE :  Page includes several designs, scroll to find this one.   Piezoelectric buzzers, such as the Murata (Smyrna, GA]PKB5-3A in Figure 1, make excellent alarms.  They're compact, lightweight, efficient, and reliable.  However, a piezo alarm is a dc device; it requires additional circuitry to operate from an ac source __ Circuit Design by SK Shenoy, NPOL, Kochi, India

MCUs in Electronics Toy applications - Microcontrollers in current Electronic toy applications is mainly used for IR interface, External EEPROM interface, Analog inputs using external ADCs and comparators, Battery input

Measure 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

Measuring Acceleration using a PIC Microcontroller (ADXL202 + PIC16F84A) - Motivation and Audience:Motivated by one of the article from circuit cellar, I want to trace the author's steps to see how the G-Force machine work.  The author wrote an article on how to build a machine, that measure acceleration using a PIC 16F84 and a acceleration sensor.  Audience will require expience in programming PIC Microcontroller  (intro to microcontroller) and basic electrical background __ Designed by dn26 @ drexel.edu

Measuring Characteristic Impedance of Short Rambus Motherboard Traces & Small-Outline RIMMs - Application Note__ Aligent

Mega Header Board - This board is to make your prototyping faster.  It snaps on a solderless breadboard while using as little space as possible.  And the best, it’s Arduino compatible.   __ Designed by Alexander Weber

Memory Card Reader - SD memory cards, especially the ones under 1GB are cheap, relatively easy to interface and provide vast amounts of memory for imbedded control.   __ Designed by Luhan Monat-Mesa Arizona

Memory termination IC balances charges on series capacitors - 08/18/05  EDN-Design Ideas - Get the best performance from high-value capacitors with simple IC circuit __ Circuit Design by Clayton B Grantham, National Semiconductor, Tucson, AZ

Message Wand - The message wand is a good PIC introduction as it is a simple project yet illustrates many aspects of the PIC usage.  Used at night, the wand is swung around above the head, and to onlookers spells out a short message in the air using flashing LEDs.  It could also be used with a handle and spun round like a traditional soccer rattle  (can you still get those?) though great care must be taken if you do this.  PICs have been popular with hobbyists for several reasons: The development tools are free, cheap programmers are available, and they come in good old fashioned DIP packages that you can solder to without a microscope! They are also extremely versatile of course! The message wand uses a mid-range PIC – the PIC16F627.   __ Contact: Karen's Microprocessor Projects

Micro Based PIR to IR Remote Converter - After the third attack on my car in 6 weeks, loosing 35 litres of fuel and generally having my day stuffed up - I got really pissed off and embarked on the EKM-1 surveillance camera system.  Next time I want to get the act on video.  My first thought was to keep it simple and use a PIR  (passive Infra-red) motion detector to set off an alarm in my bedroom - then I would manually start my VCR and record video from a low-light camera. __ Designed by Eddie Matejowsky

Micro Spy with FETs - Circuit and notes only, no circuit description given.   __ Designed by Tony van Roon  VA3AVR

Micro Spy with USW - Circuit and notes only, no circuit description given.   __ Designed by Tony van Roon  VA3AVR

Microbric Viper-The Sumo Module - Time for a little ROBOT WARS fun!__ SiliconChip

Microchip PIC14 - Engineers of my generation in the UK will remember the Science of Cambridge Mk14.  Intended to be Sir Clive Sinclair’s first home computer kit for the general public, it served to train a generation of electronics engineers in how to program microprocessors.  The Mk14 was based on, and virtually identical to, the ‘Introkit’ that was available in America at around the same time.  It had a 512 byte monitor ROM, 256 bytes of RAM, an eight or nine digit LED display with bubble magnifiers, and a notoriously bad twenty key keyboard.   __ Contact: Karen's Microprocessor Projects

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

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