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


Last Updated: October 18, 2017 05:04 AM

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

C Function Turns PC Into Serial-Bus Master -  09/02/96 EDN-Design Ideas - The UARTs built into most microcontrollers support a "9th-bit" communications mode.  If the master sets the 9th bit of a character it transmits, the slaves then interpret that character as a slave address, not as data.  The 9th-bit mode simplifies master-slave communications by using character protocols over multidrop serial lines, such as the RS-485.  A PC's UART family   (for example, the 8251 or 16550) , however, __ Circuit Design by Gregory Young, Z-World Engineering, Davis, CA

C Program Simulates Industrial Temperature SystE - M -  11/10/94 EDN-Design Ideas - The program in the ZIPfile attached to EDN BBS /DI_SIG #1621, written in Borland C, simulates industrial-temperature-data display and control.  It displays four independent channels simultaneously.    __ Circuit Design by Jyoti Vandana, World Friends Design Group Kalpakkam, Tamilnadu, India

C Routine Counts High Bits -  01/01/98 EDN-Design Ideas - Simple C routine counts the number of 1s in a 16-bit word.  You can apply the general technique to a word of any length, but for purposes of explanation, assume a word length of 8 bits    (Listing 1) .  If you AND the original word with 01010101 binary, the 8-bit result consists of four 2-bit words.  Each of these 2-bit words contains the count of the number of 1s in the least significant bit of the original word's corresponding 2-bit field.  Now, shift the word right by 1 bit and again AND the word with 01010101 binary.  The resultant group of 2-bit words now contains the count of the number of 1s in the most significant bit of the corresponding 2-bit field in the original word.   __ Circuit Design by Michael Bishop, Computing Devices, Nepean, ON, Canada

C186sbc -  Build a generic microprocessor learning board, 16-bit single board built with embedded microprocessor Intel 80C188EB.   __ Designed by Wichit Sirichote

C-52 Evaluation Board  -  This board uses 89C52 with a modified 8kB PAULMON2 monitor program, 32kB SRAM for writing application program.  The C-52 EVB was designed for studying "Assembly and C Language Programming for Microcontrollers".  Latest PCB file included __ Designed by Wichit Sirichote

C-52 Evb Robot Controller -  Use a C-52 EVB for simple robot experiments.  Build a simple two wheels robot with L293 H-Bridge driver and IR sensor.  Write a C program controls robot tracked with black tape.   __ Designed by Wichit Sirichote

C52EVB V2.0 with 32KB Eeprom Boot Loader -  New Microprocesssor Learning Board for 89C52 CPU with 32KB external eeprom.  Modified PAULMON2 provides program saving and boot loading __ Designed by Wichit Sirichote

Calculator using Postfix Notation -  Doing calculations in a microcontroller-based project is common.  Such calculations done by the microcontroller are pre-written as a part of the code, which means that these formulae cannot be changed or...__ Electronics Projects for You

Camera remote control system using Basic Stamp -  The remote control receiver is a custom design based on a pre-built 433MHz UHF radio receiver, a decoder chip and a BASIC Stamp.  The Stamp is expensive, but easy to work with.  The receiver requires 8.5mA, plus 1.5mA for each LED    (individual or segment) that is lit for a maximum of up to 23mA.  In practice it is between 13 and 16mA.  Pressing a button onThe remote transmitter causesThe receiver to consume an extra 0.2mA.  In the 'power saving' mode the PBASIC 'nap' instruction is used in combination with turning all the LEDs off to reduce power consumption to 4mA.  The battery should last about 30 hours of on-time. __ Designed by andrew @ scss.com.au

Candle Simulator -  This PIC Project  uses a PIC to simulate the flickering of a candle entirely in software.  The brightness of the lamp is controlled by doing PWM  (pulse width modulation) of the power to the lamp.  A random number generator controls the flickering amplitude.   __ Designed by Luhan Monat - Mesa Arizona

Car Network Device -  PIC Project  Our present car controller runs on a single PIC16F870 micro and provides functions for remote door locks, headlight reminder, and car finder.  It is constructed using wire-wrap to allow for future expansion and is mounted using Velcro on the passenger side of the center console __ Designed by Luhan Monat - Mesa Arizona

Cat Toy with a Small Weighted Motor -  The PIC12F675 is small in size and low in power.  It lends itself to some really off-beat uses __ Designed by Luhan Monat - Mesa Arizona

CC1101 RF Modem + 250mW Amplifier -  Here is my home-built, cloth iron soldered, range extender for CC1101  (included onboard) RF transceiver chip from Texas Instruments.  You could say that it is a CC1101+ CC2591 , but for 868/920MHz band.  I used MAX2233 RF amplifier from Maxim-IC.  It __ Designed by Radio LocMan

CD Compressor for Cars or the Home -  Do you have problems listening to CDs in your car? Are the soft bits too soft and the loud bits too loud? Here's the solution.__ SiliconChip

CD4 069 Atomic Frequency Standard -  The CD4069 Atomic Frequency Standard picks up AC "hum" from the surrounding environment to produce an accurate frequency reference.  This simple circuit generates 10 Hz and 20 Hz from 60 Hz power grids.  A short antenna picks up 60 Hz from the building wiring and applies the signal to a linearized gate, acting as a sensitive amplifier  (pins 1 and 2) .  The 0.1uF capacitor to ground at the junction of the two, 10 megohm resistors prevents negative feedback from lowering the input resistance, so the amplifier is quite sensitive.  The output of the amplifier is applied to the second gate where it is squared up  (pins 3 and 4) . 
 __ Contact: Charles Wenzel of Wenzel Associates, Inc.

CD4 069 LED Bar Graph -  This simple bar graph display uses an ordinary CD4069UB hex inverter.  Despite the limited number of LEDs, this display may be used for fine peaking and viewing small changes in amplitude, because the brightness of the most significant LED varies with amplitude.  As the voltage increases from zero, the first LED grows in brightness.  Just when that LED is fully lit, the next LED begins to glow slightly.  Each LED represents about 1 volt of change, when the circuit is operating from 9 volts __ Contact: Charles Wenzel of Wenzel Associates, Inc.

Cellphone Operated Land Rover. Part 1. Schematic -  Conventionally, wireless-controlled robots use RF circuits, which have the drawbacks of limited working range, limited frequency range and limited control.  Use of a mobile phone for robotic control can overcome these limitations.  It __ Designed by Malik Zohaib

Cellphone Operated Land Rover. Part 2. Software -  Part 1.  Schematic Software description: The software is written in C language and compiled using CodeVision AVR C compiler.  The source program is converted into hex code by the compiler.  Burn this hex code __ Designed by Malik Zohaib

Cheap & easy ways to reduce your PC noise level -  There are multiple ways in which you can cut down on noise that a typical PC emits, some are more effective than others, and usually more costly as well.  This doucument shows how to cut down on noise cost-effectively.  Obviously, you can't expect miracles, but the results come cheap, fast and relatively painlessly. __ Designed by Madis Kaal

Cheap Cable Of ASIM's ISP Loader for 89Sxxxx -  Simple hardware for code programming new series MCU from ATMEL, 89S51, 89S52, 89S53, 89S8252 __ Designed by Wichit Sirichote

Cheap Metal Detector -  The idea of this circuit is to hack PIC oscillator circuit, by replacing the crystal by a coil : the frequency of the oscillator then depends on presence of metal near the coil, just like in a classic metal detector.   __ Designed by Bruno Gavand

Cheap R2R DAC for BASIC-52 with performance analysis -   (Temperature logger) 

Cheap Ultrasonic Range Finder based on a PIC microcontroller -  Everybody knows the speed of the sound in the dry air is around 340 m/s.  Send a short ultrasonic pulse at 40 Khz in the air, and try to listen to the echo.  Of course you won't hear anything, but with an ultrasonic sensor the back pulse can be detected.  If you know the time of the forth & back travel of the ultrasonic wave, you know the distance, divide the distance by two and you know the range from the ultrasonic sensor to the first obstacle in front of it.   __ Designed by Bruno Gavand

cheap UV EPROM eraser -  An "anti-bacterial" toothbrush holder, a single capacitor and a simple IC carrier are all you need for a fully-functioning EPROM eraser.__ SiliconChip

Chip Set offers Low Cost Alternative to 48V Telecom Modules -  DN261 Design Notes__ Linear Technology/Analog Devices


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