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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:

Turn an old XBox into a $200 Multimedia Player -  The Microsoft X-Box gaming console has been replaced with the X-Box 360 and that makes secondhand X-Boxes very cheap indeed.__ SiliconChip

Two DDS ICs implement Amplitude shift keying -  12/25/03 EDN-Design Ideas - Many communications systems, including RFID systems and cable modems, use AM   (amplitude modulation].  This design idea shows how two DDS   (direct-digital-synthesis] devices can implement AM and ASK   (amplitude-shift keying] over a range of frequencies.  The AD9834 complete 50-MHz DDS IC   (Figure 1) has a current output, so you can easily sum the outputs of two orof them by connecting them to a __ Circuit Design by Noel McNamara, Analog Devices, Limerick, Ireland

Two gates & a microprocessor form digital PLL -  04/14/05 EDN-Design Ideas - Low-frequency PLL needs just a processor and gates __ Circuit Design by Kenneth Martin, TareTronics Inc, Corinth, MS

Two Gates Expand ASICs Memory Decoding Range -  03/29/01 EDN-Design Ideas - Many electronic circuits implement chip-select lines on an ASIC.  From  beginning of  design cycle,  chip selects, CS0 to CS4, have defined bases on  memory map   (Figure 1) .  Adding functions __ Circuit Design by Vinh Hoang, Ericsson Inc, Brea, CA

Two PIC pins drive six LEDs -  06/09/14 EDN-Design Ideas - Here’s a take on LED multiplexing with minimal output pins.  This Design Idea demonstrates a new method of driving six LEDs with only two I/O lines from a microcontroller, and so is particularly suitable for any pin-limited chip.  It uses a pair of I/O lines combined with a pair of complementary bipolar transistors.   __ Circuit Design by Benabadji Noureddine

Two Toslink-S/PDIF Audio Converters to Build -  Do you have a DVD or CD player with a TOSLINK  (optical) output but only coaxial S/PDIF inputs on your amplifier? Or do you have the opposite problem? What about hum from your speakers when running digital audio via a coaxial cable? With these simple converters you can easily solve these problems.__ SiliconChip

Two-Chips Simplify Layout for High-End Embedded Control -  04/01/99 EDN-Design Ideas - NOTE :  File contains many designs.   Scroll to this one.   If you are considering using one of the 32- or 64-bit RISC µPs from Integrated Device Technology   (IDT], the company’s new RC32134 and RC64145 system-controller ICs   (Picture] can make your job easier.  The chips provide synchronous-DRAM, memory, and I/O control; a PCI interface; and peripherals, including UARTs, timers, and interrupt controllers.  The 32134 for the RC32364 µP provIdeas a glueless interface to DRAM Page includes several designs.   __ Circuit Design by Graham Prophet

Two-DDS ICs implement Amplitude shift keying -  12/25/03  EDN-Design Ideas - Many communications systems, including RFID systems and cable modems, use AM  (amplitude modulation].  This Design Idea shows how two DDS  (direct-digital-synthesis] devices can implement AM and ASK  (amplitude-shift keying] over a range __ Circuit Design by Noel McNamara, Analog Devices, Limerick, Ireland

Two-gates & a microprocessor form digital PLL -  04/14/05  EDN-Design Ideas - Low-frequency PLL needs just a processor and gates __ Circuit Design by Kenneth Martin, TareTronics Inc, Corinth, MS

Two-Way SPDIF/Toslink Digital Audio Converter -  Need to convert the Toslink digital audio optical signal from your DVD player into coaxial SPDIF form, to feed the only remaining digital input on your home-theatre amplifier? Or do you want to convert from a coaxial SPDIF signal to Toslink form? This low-cost unit converts digital audio bitstreams either way.__ SiliconChip

UHF Remote 2-Channel 230VAC Power Switch -  If you're looking for a mains "switch" which can be operated from some distance away, this low-cost, simple project could be just what you want.  With a UHF remote control and two switched "channels", it needs very little power thanks to the use of latching relays.__ SiliconChip

UHF Remote Controlled Mains Switch -  Want to switch mains appliances on and off remotely? This UHF Remote Mains Switch can do it for you.  It's operated using a hand-held UHF transmitter or you can team it with the Water Tank Level Meter Base Station described last month to automatically control mains-operated water pumps.  An in-built timer also enables the unit to turn off automatically after a preset period.__ SiliconChip

UHF Remote Mains Switch Transmitter -  Designed to control the UHF Remote Mains Switch, this hand-held transmitter can operate over a 200m range.  It's based on a PIC micro and a pre-assembled transmitter module, making it easy to build and get going.__ SiliconChip

UL Isolated Self-Powered Sensing -  DN204 Design Notes__ Linear Technology/Analog Devices

Ultra Low-Cost Programmer for AT90s Family -  With this programmer you can program AT90S1200,  2313,  2323, 2343, 4414, 4434, 8515, 8535 __ Designed by © Vassilis Serasidis

Ultra-LD Mk.3 135W/Channel Stereo Amplifier, Pt.2 -  Completing the wiring & making adjustments__ SiliconChip

Ultra-LD Mk.3 135W/Channel Stereo Amplifier, Pt.3 -  Finally, we present the specifications for the new Ultra-LD Mk.3 Amplifier along with a couple of minor tweaks to the design to maximise its performance.__ SiliconChip

Ultra-LD Mk.3 135W/Channel Sterio Amplifier, Pt.1 -  Chassis assembly and wiring details__ SiliconChip

Ultra-LD Mk.3 200W Amplifier Module  -  Upgraded design has even lower distortion!__ SiliconChip

Ultra-LD Mk.3 200W Amplifier Module, Pt.2 -  The Ultra-LD Mk.3 amplifier module introduced last month is by far our lowest distortion Class-AB amplifier design.  This month, we present the construction details and give some additional information on its performance.__ SiliconChip

Ultra-LD Mk.3 200W Amplifier Module, Pt.3 -  Power supply & quiescent current adjustment__ SiliconChip

Ultra-LD Stereo Preamplifier & Input Selector, Pt.1 -  Designed for use with the Ultra-LD Mk.3 amplifier modules, this high-quality stereo preamplifier features a motorised volume control potentiometer.  It is teamed with a 3-Input Selector board and both are controlled by the same infrared remote.__ SiliconChip

Ultra-LD Stereo Preamplifier & Input Selector, Pt.2 -  In Pt.2 this month, we describe the assembly of the Input Selector module and its companion Switch Board.  We also show you how to make the IDC cables that link the modules together and give the remote control set-up and test procedure.__ SiliconChip

Ultrasonic Anti-Fouling Unit for Boats -  Marine growth on the hull is the bane of all boat owners.  Left unchecked, marine growth slows the boat down considerably and if it's a power boat, leads to large increases in fuel consumption.  If it's a yacht, marine growth will also slow it down and make it less manoeuvrable, to the point where it becomes very sluggish.  The cure is to haul the boat out of the water every year and water-blast and scrape away all the growth and then coat the hull in toxic anti-fouling paint.__ SiliconChip

Ultrasonic Distance Measurement with the MSP430 (PDF) -  This application report describes a distance-measuring system based on ultrasonic sound utilizing the MSP430F413 ultralow-power microcontroller.  The system transmits a burst of ultrasonic sound waves towards the subject and then receives the corresponding echo.  The MSP430 integrated analog comparator Comparator_A is used to detect the arrival of the echo to the system __ Designed by TI Application Report SLAA136A - October 2001

Ultrasonic Radar Model using Microcontroller Atmega128 -  Radar systems have a number of defence as well as civil applications.  Air traffic control uses radars to track aircrafts on the ground and in the air, and to guide planes...__ Electronics Projects for You

Ultrasonic Range Meter -  On these pages, I will introduce the Ultrasonic Range Meter with PIC16F873.  As for the range meter which doesn't use PIC, refer to "Ultrasonic Range Meter".  I created the PCB pattern for this circuit using EAGLE CAD.  With this circuit, the following features of PIC16F873 are used.   __ Designed by Seiichi Inoue

Understanding Micro-Controller Input/Output Ports -  All micro-controllers must connect to something to be of any use and how that is done is the subject of this tutorial.  While I will use the PICAXE 18M2 the material here will apply to any other micro-controller.  In Figure 1 is the pinout of the 18M2 chip.  The function of most pins can be changed under software control making available any number of configurations.  Here I'll explore input, output, and analog-to digital conversion.   (ADC)  __ Designed by Lewis Loflin

Universal Flasher -  LED flasher with the LM3909 IC and runs from1.5-Volt battery.   __ Designed by Tony van Roon  VA3AVR

Universal High-Energy Electronic Ignition SystE - M -  It works with a variety of trigger inputs and uses a PIC microcontroller to control the switching transistor__ SiliconChip

Universal High-Energy LED Lighting SystE - M -  Incredibly versatile LED lighting system uses a rechargeable battery pack and has lots of applications.__ SiliconChip

Universal High-Energy LED Lighting SystE - M -  Second article has all the construction details.  And we show you how to make a very effective Luxeon-powered spotlight for bicycles__ SiliconChip

Universal I/O Board with USB Interface -  This hardware I/O board will let you drive a host of digital and analog I/O    (input/outputs) via the USB interface on your laptop or desktop computer.  Based on an Atmel Atmega32 microprocessor and not much else, it works on Windows, Linux and Macs.__ SiliconChip

Universal NiCad/NiMH
Charger
-  Sometimes its more convenient to recharge batteries 'in place' rather than removing them and putting them in an external charger.  This device is built around a PIC12F675  (a dandy little part from Microchip) .  The number of cells  (1 to 8) is programmed in using the one button __ Designed by Luhan Monat-Mesa Arizona

Universal OS PIC Programmer -  This programmer requires only a basic terminal program capable of uploading an ascii PIC HEX file.  It does not matter what operating system or computer  (MAC, Win98, XP, Vista, DOS, Linux, etc.) is used to talk to it.   __ Designed by Luhan Monat - Mesa Arizona

Universal RC5/RC6 Transceiver  -  The IR receiver: When the TSOP1736  (IR receiver) receives an infrared  (IR) signal from a RC5 or RC6 remote control  (like Philips) burns LED1  (green) .  The LCD shows when it receives a new type of code for one second which protocol is received  (RC5, RC5X or RC6) .  After then the LCD shows the RC5 or RC6 system and command code in decimal as well in binary.  

Unused µC ADC pins find second life -  02/03/00 EDN-Design Ideas - Some PIC µCs, such as the 12C67X and 16C7X, have more than one analog input channel.  If you don't need all the available channels, you can use the unused channels as general-purpose I/O.  For example, you can use unused ADC pins for power-on status reading and as an output in normal operation.  In Figure __ Circuit Design by Kannan Natarajan, Mediatronix Private Limited, Kerala, India

Unused 8051 Pin Gets Assignment -  01/04/96 EDN-Design Ideas - In an 8051-based system without external program memory, the program-store enable (PSEN) pin is useless.  However, you can indirectly control this pin using software.  To do so, you execute the move-constant- (MOVC-) instruction-implementing table look-up.   n an 8051-based system without external program memory, the program-store enable (PSEN) pin is useless.  However, you can indirectly control this pin using software.  To do so, you execute the move-constant- (MOVC-) instruction-implementing table look-up __ Circuit Design by Jerzy R Chrzaszcz, Institute of Computer Science Warsaw University of Technology Warsaw, Poland - this link is broken/  Contract EDN for new URL

Unused Port Adds a PWM/Analog Channel to a Microcontroller -  8-Oct-09 EDN-Design Ideas - Take advantage of unused pins to generate a PWM signal and then filter it into analog __ Circuit Design by Vishwas Vaidya, Tata Motors Ltd, Pune, India

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

 


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