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

Last Updated: June 02, 2021 01:44 PM

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

Network Car Controller - 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

Never buy another 9V battery - Don't buy expensive, short-lived 9V batteries.  This little DC-DC converter is adjustable and lets you use two AA, C or D-size cells instead.__ SiliconChip

New 8051SBC - Brown-out protection, WDT, 20x4 LCD BUS interface.  Simple scope using Nokia 3310 LCD __ Designed by Wichit Sirichote

New Battery Charger ICs Need No Heat Sinks - DN124 Design Notes __ Linear Technology/Analog Devices

New ICs Simplify Battery Charging from the USB - DN320 Design Notes __ Linear Technology/Analog Devices

New MAR-8A & MAR-8ASM Amplifiers - AN-60-024 Application Note__ MiniCircuits.com

NIBL Tiny Basic Computer on a PIC - Eager to promote the SC/MP microprocessor as an industrial microcontroller, National released their ‘National Industrial Basic Language’ for this chip.  It was quickly seized upon by hobbyists who used it in early home computers.  The European publication Elektor ran a particularly popular series of articles on this and other SC/MP projects, and I believe even released programs on 45RPM records!  This project is a three chip NIBL computer with 8 kilobytes of data and program storage.  Young ‘uns may scoff, but that was once sixty-four 2102 kilobit memory chips!!    __ Contact: Karen's Microprocessor Projects

NiCad 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

Night Light Saver V3.2 - Now it's time for Microchip PIC12C508 8-pin Microcontroller.  The saver turns a night light on and off with preset time, no battery backup, easy installation.   (not recommended)  __ Designed by Wichit Sirichote

Night Light Saver V5.0 - I have designed a device that controls a night light at home.  The saver uses 2051 chip and a small TRIAC.  The saver features low-cost, simple installation, no battery backup, and save energy.   __ Designed by Wichit Sirichote

Night Light Saver V6 - Latest design night light saver, built with sdcc __ Designed by Wichit Sirichote

Nixie Clock PIC16F876 - Schematic only

Nokia 3310 LCD & PIC12F629 Thermometer - Device with Nokia 3310 Lcd, Pic12F629 & DS18B20 temperature 1Wire sensor   - published in magazine "Svijet elektronike" Nr.58  (June / July 2006)  .   Author: Ivica Novakovic __ Designed by © Ivica Novakovic

Nokia 3310 LCD Thermometer using DS18B20 - This page describes a device I designed to test such a display and turned out to be the circuit that I am proud to share with you.  Since my motto is “simplicity in construction”, with a few parts you will be able to create a relatively accurate and visually appealing thermometer. __ Designed by ivica.novakovic

Nokia 7650 LCD Controller - Despite nobody seems to own the appropriate documentation, it is possible to use the big cheap color LCD displays of the Nokia series 60 cell phones for home brew projects.  I don't even have the docs and it was a rough and painful way, but now it works

Nřkken Mark 3 ROV - The final iteration of the Nřkken underwater exploration vehicle.

Nřkken Mark I-ROV (Underwater Exploration Vehicle) - Explore the depths of the ocean!

Notoof Remote Telemetry Device! - This PIC project permits five analogue signals to be acquired  (to ten bits resolution) and transmitted to a remote computer.  As well as a conventional serial output, the PIC generates an FSK signal that can be conveyed through almost any audio channel.  The FSK output is used in this project to illustrate data transfer using an FM transmitter.   __ Contact: Karen's Microprocessor Projects

Off the Shelf MmIC Suits Mixer Applications - 02/02/98 EDN-Design Ideas - You can use a standard monolithic-microwave IC (MMIC) to configure an efficient and economical microwave mixer.  Some systems require a mixer with an input level lower than -10 dBm.  Many available mixers, however, require greater than 10-dBm input power.  The circuit in Figure 1 exploits the inherent nonlinearity of a Mini-Circuits  (Brooklyn, NY) MAR6 microwave amplifier to configure a low-level mixer.  The idea is to add the input signals and feed the sum to the MMIC  (Figure 1a) .  The amplifier's saturation characteristic produces the harmonics and intermodulation products.  The MMIC has greater than 10-dB gain at frequencies over 1 GHz, a desirable characteristic for making mixers for the 0.9, 1.8-, and 2.5-GHz bands. Design by J Leira Paz, M Pereira Varela, and FP Fontán, University of Vigo, Spain

Off-The-Shelf ICs Make 10-Bit Convolver - 12/19/96 EDN-Design Ideas - The block diagram in Figure 1 shows how you can implement a 333 10-bit kernel using two dual FIR-filter and two delay-buffer ICs.  This configuration operates with clock speeds of 32 MHz.  With the appropriate modifications, the technique is also applicable to convolutions that require greater than 10-bit resolution.  The block diagram implements the 333 convolution as the sum of three row vectors' dot products.  FIR 1A and 1B implement the top two row vector dot products, and dual FIR 2B implements the bottom row vector dot product.  FIR 2A provIdeas a path for summing the three dot products to obtain the convolution sum. Design by Guenter Kremser, Harris Semiconductor, Munich, Germany

Oh no! Not Another CFL Inverter - Yep another one but this one's really simple.  Its powered from 12V and is just the shot for running multiple compact flourescent lights  (CFLs) or even a small colour TV set.__ SiliconChip

ON/OFF with MicroControllers - Here is a technique how to implement an ON/OFF button using microcontrollers.   __ Designed by Jose Pino

One I/O line drives shift register with strobe - 03/28/13  EDN-Design Ideas - This Design Idea shows how a single microcontroller port can drive a lot of output lines through shift register. by Zoran Mijanovic & Nedjeljko Lekic

One Microcontroller Pin Drives Two LEDs with Low Quiescent Current - 02/07/08  EDN-Design Ideas - Two simple circuits allow a battery-powered microcontroller to drive two LEDs Design by Antonio Muńoz, Laboratorios Avanzados de Investigación del I3A, Zaragoza, Spain, and Arturo Mediano, PhD, GEPM University of Zaragoza, Zaragoza, Spain

One microcontroller serves multiple external interrupts - 02/01/01 EDN-Design Ideas - In designing µC-based systems, you often face a situation in which the µC has to respond to an external event happening at an uncertain moment in time.  One example is receiving an echo from an object in a pulse-range measuring sy Design by Abel Raynus, Armatron International, Melrose, MA

One processor pin controls on/off function - 04/29/04  EDN-Design Ideas - A recent Design Ideas - prompted me to offer the simpler solution that I used in a recent project    (Reference 1].  We needed a momentary power switch with processor supervision.  This supervision would allow the processor to delay a powe Design by Michael Sirkis, Radio Systems, Logan Township, NJ

One wire connects microcontrollers - 10/22/98 EDN-Design Ideas -    (File has several circuits, scroll to find this one)  Low-cost µCs, such as Motorola's 68HC705 Series, offer great simplicity at the expense of some useful functions—notably, serial data transmission.  Unlike their predecessors, these µCs do not have serial communication interfaces    (SCIs) , serial peripheral interfaces    (SPIs) , or simple serial I/O ports    (SIOPs) .  This method describes how you can overcome this deficiency by creating an asynchronous serial interface through µC software Design by Abel Raynus, Armitron International, Melrose, MA

Optimizing LNA Performance for CDMA Application using Nonlinear Simulator 6/24/02 - App Note  Doc #955__ California Eastern Laboratories

Orrery - The Orton Orrery is a mechanically scanned planetary motion simulation that uses flashing LEDs in place of the planets.  In keeping with 18th century Orrery tradition, only the first six planets  (Mercury to Saturn) are present.  A single PIC16F627 is all that’s needed to get an Orrery in your living room!  Electrically, the Orrery is two parts: A rotating assembly consisting of LEDs and PIC, and a motor.  Both are powered separately – the spinning part draws power from on-board coin cells and the motor draws power from a small plug-in mains power supply.  The PIC code includes a phase locked loop  (PLL) to maintain synchronisation of the display with motor rotation, thereby avoiding the need for a motor speed controller.   __ Contact: Karen's Microprocessor Projects


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

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