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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:

Home Security - PIC Project  Creating a modular, networked, home control system was greatly simplified by using common 4-wire phone cable with stake-on connectors.  The cable feeds both power and network signals to the various modules.  Each module is made on a single sided circuit board with RJ-11 connectors  (for the network/power) along with other connectors as needed.  This eliminates the need for placing power feeds  (wall worts) for each of the modules.  The entire system runs on one power feed.   __ Designed by Luhan Monat - Mesa Arizona

Home Theater - PIC Project  This unit is designed to interface: TV sound, videotape sound, and 5.1 dvd sound to a 4 channel home theater system.   __ Designed by Luhan Monat - Mesa Arizona

Home-Brew Weatherproof 2.4GHz WiFi Antennas - 2.4GHz wireless networking  (WiFi) is on the rise.  Here's how to make two high-performance weatherproof WiFi antennas.__ SiliconChip

Homebrewed Stamp - My Homebrewed stamp.  I ordered it from Peter Anderson, he supplies all the components neccessary to build it, but no pcb board.  I got a friend of mine to make me a pcb board for it, then i just solder everything on.  You can just use a breadboard instead of a pcb board, but the pcb board make a nice job of it.  It is nice because all the IC's are in sockets, so if you want to write to the EEPROM thousand times a day, you can, just replace it when its life it up.  Its a great product, if you want to find more info on the Homebrewed stamp go over to my links section and look for Peter Anderson's website.   __ Designed by Shaun Wilson

Homebuilt RS232 LCD Interface - This controller board takes anything between +5Volt to +30 Volt power ,  (have it's own regulator) .  

Homebuilt video Digitizer Mark I - This frame grabber design digitises pictures to very high quality in monochrome  (8-bit black & white) . Although designed for the European standard 625-line / 50Hz TV system, it should work with the American 525-line / 60Hz standard with minimal modification. __ Designed by W.A. Steer  PhD

Homebuilt Video Digitizer Mark II - A "video-digitiser"  (also known as a "frame grabber") captures television pictures from a TV set, camera, or video recorder, etc., and forwards them to a computer for display, storage, or general manipulation. This document describes a home-built digitiser which interfaces to an EPP  (or bi-directional) parallel port on IBM PCs. __ Designed by W.A. Steer  PhD

How a 3499A/B/C System Benefits from Upgrading to the New 34980A Switch/Measure Unit - Application Note__ Aligent

How Easy-Downloader V2.0 Connects Host Pc - Details description of simple protocol between programmer board and host PC's software.   __ Designed by Wichit Sirichote

How to Program the Bias DAC in Manual Mode for the DS1863/DS1865 PON Controllers  - App Note 4196-- 3/17/2008 --  (add 5/08) __ Maxim Integrated

I/O System & Chip Verification in PCI & PCI-X Systems - Application Note__ Aligent

I2C Bus Sniffer on AVR - The I2C Bus Sniffer allows for non-intrusive monitoring of an I2C bus.  All data, including device addresses, ACK/NAK, START and STOP conditions, are reported in textual form to a serial terminal.  A familiar theme in open-source

I2C LCD interface - Schematic Only

I2C/RS232 to Standard LCD Converter - This small board allows to connect a standard 1 line or 2 line LCD-Module  (with HD44780 LCD-Controller or compatible) to I2C bus or optional to RS232.  Here is the [url=http://www.  circuitdb.  com/download.  php?fileID=155]schematic  (Rev.1) in pdf format[/url] [url=http://www.  circuitdb.  com/download.  php?fileID=158]Assembly drawing  (Rev.1) in pdf TOP[/url] [url=http://www.  circuitdb.  com/download.  php?fileID=157]Assembly drawing  (Rev.1) in pdf BOTTOM[/url] [b:e9b66b14da]Pictures of the

I2C-tiny-USB. Part 1 - Attach any I 2 C client chip  (thermo sensors, AD converter, displays, relais driver,) to your PC via USBquick, easy and cheap! Drivers for Linux, Windows and MacOS available.  The i2c-tiny-USB project is an open source/open hardware

I2C-tiny-USB. Part 2 - Compiling the firmware The ATtiny45 is quite new and thus not all parts of the development chain support this chip in their current release versions.  The latest binutils  (linker an assembler) and avrdude  (programmer) support the new chips as well

IC & DMM form direct-read-out temperature probe - 09/01/06 EDN-Design Ideas - Simple circuit yields linear voltage-versus-temperature output __ Circuit Design by Alfredo H Saab and Bich Pham, Maxim Integrated Products Inc, Sunnyvale CA

IC Adds Full Duplex RS485 Operation - 11/23/94 EDN-Design Ideas - The simple RS-485 repeater  (Fig 1) provIdeas full-duplex communications--simultaneous transmitting and receiving--with only two ICs.  Its balanced and differential data lines battle high-noise environments and drive long lines.  Single-ended RS-232C schemes cannot equal this circuit's performance.    __ Circuit Design by Ron Clark, Maxim Integrated Products, Sunnyvale, CA

IC Forms Differential Line Driver/Receiver - 05/25/95 EDN-Design Ideas - you can use the HFA1212 dual video buffer to implement differential line drivers and receivers with a minimum of external components __ Circuit Design by Mark Amarandos, Harris Semiconductor, Costa Mesa, CA

IC maintains uniform bias for GaAs MESFETs - 08/22/02 EDN-Design Ideas - The gate-turn-on threshold voltage for GaAs MESFETs (gallium-arsenide metal-semiconductor field-effect transistors] varies considerably from part to part, even within a given lot.  That behavior makes biasing difficult, especially if you want to design the device into a high-volume product.  To overcome this drawback, you can introduce a current sensor that monitors the bias current and provIdeas __ Circuit Design by Ken Yang, Maxim Integrated Products, Sunnyvale, CA

IC Performs Delayed System Reset Upon Power-Up - 02/07/08  EDN-Design Ideas - By adding a transistor with some capacitors, diodes, and resistors, you can transform a pure-manual reset to an automatic reset with adjustable hold time for the reset IC __ Circuit Design by Goh Ban Hok, Infineon Technologies Asia Pacific Ltd, Singapore

IC Provides Versatile Toggle Functions - 08/21/08 EDN-Design Ideas - Using Schmitt-trigger inverters as flip-flops, you can realize a number of novel toggle functions __ Circuit Design by Louis Vlemincq, Belgacom, Evere, Belgium

IC removes nonlinear temperature effects - 09/25/03 EDN-Design Ideas - A common technique for removing nonlinear temperature-related effects from a dc voltage is to incorporate a temperature sensor that a microprocessor samples via an A/D converter.  The processor determines—by mathematical calculation or a temperature-indexed look-up table—the amount of adjustment is necessary at a given temperature and delivers the resulting value via a D/A converter __ Circuit Design by Kevin Schemansky, Maxim Integrated Products, Howell, MI

ICSP Loader - ICSP loader using LPT interface for programming PIC chips in application board __ Designed by Wichit Sirichote

IDE interface to a Microchip PIC16F877 microcontroller - 4 prototype boards arrived today.  After going over them carefully, I found 4 lines that crossed each other.  After some quick surgery with a knife and some solder and wire, the IDE project is now semi portable.  The power supply is still out of a PC, so it's tied to an AC outlet.  I'd like to make it battery powered or at least get a smaller power source on it so it's more easily moved. __ Designed by Barry Michels0

Implement Multiple Output Ports - 02/16/98 EDN-Design Ideas - In µP/µC systems, you sometimes need to use many output ports and update all the ports simultaneously.  For instance, in systems that use multiplexing techniques, the output ports require refreshing for every scanning period.  One  __ Circuit Design by W Kurdthongmee, Nakorn Si Thammarat, Thailand

In-Circuit PIC Loader (ISP Programmer) Over Parallel Port - This loader connects the PC printer port and works with WinPic800.  The loader gets DC supply from application board and provides +12V for high voltage programming mode.  We can use it for programming many PIC chips easily.   __ Designed by Wichit Sirichote

Increase your driving safety with Quick Brake - Simple project turns your brake lights on faster than you could ever apply them, to reduce rear-end shunts.__ SiliconChip

Inductance & Q-Factor Meter, Pt.2 - Second article has all the construction details.__ SiliconChip

Inductance & Q-Factor Meter; Part 1 - Compact unit measures inductors from 200nH - 10mH, checks Q-factor from 1-120 and displays the results on an LCD__ SiliconChip

Inexpensive logic controls stepper Motor - EDN-Design Ideas - March 26, 1998    [ NOTE : File has multiple design, scroll for this one.]  A number of sophisticated ICs for stepper-motor control are now available. However, the advanced features of these chips--self-clocking, high-current drive, and full-step, half-step, and direction control--are often unnecessary or remain unused. For a design that needs to control only the number of steps, drive speed, and direction, you can make a very simple and inexpensive driver using two low-level logic chips  (Figure 1) . __ Circuit Design by David Ellis, Ellis Lindauer, Pullman, WA

Infrared remote control receiver - You can control now your media center with this programmable RC5 receiver.  Moreover, you can switch On/Off your Media Center by your remote control  __ Designed by © Vassilis Serasidis

Infrared repeater - I built this MCU based infrared repeater to allow me to control my A/V equipment that is behind a wall.  The system is very simple.  Power is supplied to CON1 from a cheap Alcatel phone charger that outputs stabilized 12V, passes through reverse voltage protection diode to IC1 that outputs 5V VCC.  Atmel AVR microcontroller runs from 4MHz ceramic resonator Y1, C3+R1 form a reset circuit.  Infrared detector  (TSOP1738 in my case) is connected to INT0 input, C1+R2 are for detector power filtering.  There is a green indicator LED D2 connected to PB2,  __ Designed by © Madis Kaal

Installing a Free-Air Subwoofer In Your Car - You dont need to take up lots of room with a big box; this uses the boot as the enclosure.  And it w__ SiliconChip

In-System programming adapter for Atmel AVR Microcontrollers - A simple circuit to program almost any Atmel AVR microcontroller in-circuit.__ SiliconChip

Integrated Audio Amplifiers - In a previous article I discussed building audio amplifiers using discrete transistors.  While it is possible to build good audio amplifiers from discrete transistors, they are no match for the many audio amp IC's available to us.  IC's offer many advantages including high efficiency, high gain, low standby current, low component count, small size and , of course, low cost.  It is little wonder that audio amp IC's have replaced discrete transistors in most consumer electronic devices.  While __ Designed by Mike Martell N1HFX

Integration - This circuit is used when delaying the standing-up of the square wave signal.  Also, in the case having to do with the pulse of the input signal, it uses for the circuit as it changes the output voltage gradually by the occurrence frequency of the pulse, too.  In the case, the resistor must be put in parallel with the capacitor to miss the electric charge which was stored up at the capacitor.   __ Designed by Seiichi Inoue

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

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