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Last Updated: November 30, 2017 07:39 AM


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

Digital Call Sign Annunciator -  In the USA, R/C wireless video hobbyists are required to operate their video transmitters under the FCC Part 97 regulations   (amateur radio).  The only exceptions are the Part 15 approved systems, but these low power alternatives are rarely used.  Other countries have similar requirements.  Playing by the rules will certainly prevent conflicts with government officials, since they can levy substantial penalties to offenders.  But more importantly, following the rules is the basis of good amateur radio manners.   __ Designed by RC-CAM T. Black

Digital Clock with Timer & Solar Panel Regulator -  This is a combination digital clock timer and solar panel charge controller used to maintain a deep cycle battery from a solar panel.  The timer output is used to control a 12 volt load for a 32 minute time interval each day.  Start time is set using 9 dip switches and ends 32 minutes later. __ Designed by Bill Bowden

Digital pot adjusts LCD's contrast -  02/04/99 EDN-Design Ideas NOTE : Page includes several designs.  Scroll to find this one.  You can use a digitally controlled potentiometer for many purposes.  In this example, you can use the device to regulate the contrast of a standard(such as two lines by 40 characters] LCD.  You can use the circuit in Figure 1 in a portable test system, in which you need to change the contrast of the LCD as a function of the viewing angle.  You choose the contrast setup__ Circuit Design by Jef Collin, CSE Systems, Turnhout, Belgium

Digital Potentiometer Controls LCD Bias -  03/17/94 EDN-Design Ideas Designers of pen-based computers can easily relegate some controls that were previously mechanical, such as switches and potentiometers, to on-screen icons.  For example, the circuit in Fig 1 shows one way that digital logic can control the -24V-dc LCD bias using two general-purpose I/O command lines.  The DS-1669 from Dallas Semiconductor__ Circuit Design by Michael Cortopassi, Dauphin Technology, Lombard, IL

Display bit-map images on small-graphic LCDs -  11/19/98 EDN-Design Ideas NOTE :  File contain several designs.  Scroll to find this one.  Combining a high-level language, such as Microsoft Windows, with low-level assembly code or C++ code allows you to display perfect bit-map pictures on your small-graphic LCD screen.  You can use Microsoft Paint or any other bit-map-generating program to define and edit the picture.  Unlike segmented and alphanumeric LCDs, small-graphic LCDs are fully graphical and can display logos, graphs, or any other image in addition to numbers and characters.  The main hurdle to upgrading to this type of display is the software necessary to display the bit-map pictures.__ Circuit Design by Todd Fitzsimmons, Densitron Corp, Santa Fe Springs, CA

Displays Multiple Chart or Oscilloscope Timing Ticks -  05/01/08  EDN-Design Ideas A crystal controlled microcontroller generates precise timing ticks__ Circuit Design by William Grill, Honeywell, Lenexa, KS

DisplayTech LCD interface -  Low cost LCD module interface with optional LED backlight __ Designed by Michel Bavin

Dot/Bar Display Driver -  The LM3916 is a monolithic integrated circuit that 2 senses analog voltage levels and drives ten LEDs, LCDs, or Vacuum Fluorescents LCDs or vacuum fluorescent displays, providing an electronic version of the popular VU meter.  One pin by User changes the display from a bar graph to a moving dot display __ Designed by SNVS762B – JANUARY 2000 – REVISED MARCH 2013

Driving a WLED does not always require 4 V -  Texas Instruments provides a broad portfolio of high-performance products for your LED design needs.  From RF and power management (including AC/DC, Power Factor Correction, DC/DC and linear power conversion) to DSPs and ultra-low-power MCUs, TI has products to differentiate your design.  And, TI's local support and applications expertise can help you get to market faster.   __ Designed by Texas Instruments App Notes, 12-Oct-07

Driving an LCD From the Parallel Port -  You build the module, then use the software to display messages of to program a thermometer/thermostat chip.___ SiliconChip

Driving VFDs with a PIC -  Vacuum fluorescent displays, known as VFDs (because both vaccuum and fluoroscent are hard to spell) are commonly used in VCRs and microwaves.  They are relatively bright and have a low power consumption.  Some older calculators used them before LCDs became popular.  Having obtained a few Futaba VFDs from a surplus dealer, I went about trying to interface it to a PIC.  A plea went out on the PIC list and was soon answered by Kalle Pihlajasaari with a few details on VFDs.   __

Dual Digital Thermometer -  This application shows how to use the PIC16F877 to control, and interface with the Dallas DS1820 1-Wire™ Digital Thermometer.  If you missed the LCD connection schematic for these experiments,  __ Designed by © Reynolds Electronics

DVI/HDMI Decoder -  From the day i received my beagleboard rev.  B7 i was missing an easy way to use the digital video interface with a small LCD screen.  Many people seem to have the same problem and often end up with big and expensive adaptors.  Further indication that this is a common problem comes from the fact that the latest incarnation of the beagleboard includes a way to directly interface to the OMAPs parallel video interface.  Unfortunatately this only provides 1.8v signals and still needs a converter to interface to the 3.3v signals most raw LCD use. __ Designed by Till Harbaum <Till @ Harbaum.org>

Easily display bit-map images on small-graphic LCDs -  11/19/98 EDN-Design Ideas NOTE :  File contain several designs.  Scroll to find this one.  Combining a high-level language, such as Microsoft Windows, with low-level assembly code or C++ code allows you to display perfect bit-map pictures on your small-graphic LCD screen.  You can use Microsoft Paint or any other bit-map-generating program to define and edit the picture.  Unlike segmented and alphanumeric LCDs, small-graphic LCDs are fully graphical and can display logos, graphs, or any other image in addition to numbers and characters.  The main hurdle to upgrading to this type of display is the software necessary to display the bit-map pictures.__ Circuit Design by Todd Fitzsimmons, Densitron Corp, Santa Fe Springs, CA

EE 491 Senior Project Digital Oscilloscope Cornell University 2000 -  My senior project is to design and build a digital oscilloscope for Professor Land.  This project involves a number of design challenges.  On the analog side, I need a fast, low noise A/D converter.  In addition, the circuit requires a -20V bias from a 5V supply.  In the realm of digital, it involves interfacing two micro-controllers with each other, an LCD display, and an analog to digital converter.  With such a broad range of challenges, I searched for help from my professors and contacts I made on the web.  I was successful in getting __ Designed by Reid Gurnee

Embedded Processor Directly Drives LCD -  01/09/03 EDN-Design Ideas Driving a bare LCD does not necessarily require specialized interface circuitry or peripherals.  This design idea describes an alternative drive scheme, which you can easily implement using the general-purpose outputs of a microcontroller.  Many embedded-system applications need to interact with a user by displaying simple numeric or alphanumeric characters__ Circuit Design by Daniel Malik, Motorola, Czech Republic

ErICsson Cell Phone Display GA628 -  The GA628 display provides a 12 character alphanumeric display , some icons in the second line and power consumption of some 100 uA.  It can easily be connected to the hardware, simply by soldering some wires.  The only disadvantage is , it needs a 3.3 V power supply and something around 5.6V.  However, this code and the MSP430 provides a clock for a simple charge pump, realized with 3 diodes __ Designed by Robert Tyrakowski

Excel offers painless LCD initialization -  09/20/01  EDN-Design Ideas To display a font or a symbol on an LCD, you need to convert the desired character into numerical data.  Creating the data for an entire font set requires specialized tools; even with these tools, the task can be daunting.  Alternati__ Circuit Design by Alberto Bitti, Eptar, Lugo, Italy

Fourth Generation of LCD Backlight Technology -  AN65 Linear Technology This publication, LTC's fourth effort devoted to LCD backlighting in as many years, treatssubject comprehensively.  The text considers lamps, display and layout induced losses, circuitry, efficiency related issues, optimization and measurement techniques.  Twelve appended sections cover lamp types, mechanical design, electrical and photometric measurement, layout, circuitry and related topics.  __ Linear Technology/Analog Devices

GPS LCD Display Project -  This is a project that I started back late 2003 when I just starting to learn PIC programming.  I wanted to building something that actually did somthing useful.  This project is based on a PIC16F84.  I actually came up with this idea and then after doing some searching I found that a few people had the same idea.  But, I wanted to build my own that I could call mine, developed by me.  The whole idea is, I have several GPS units with no display __ Designed by Jason KE4NYV from Roanoke, Virginia

High Power Ccfl Backlight Inverter for Desktop LCD Displays -  DN164 Design Notes __ Linear Technology/Analog Devices

High Power Desktop LCD Backlight Controller Supports Wide Dimming Ratios While Maximizing Lamp Lifetime -  DN264 Design Notes___ Linear Technology/Analog Devices

I2C LCD Interface -  Schematic Only __

Illuminated Optical Magnifier -  We often face problem while reading the values of ICs and miniature SMD components, detecting cracks or shorts in tracks in a PCB, or reading a finely-graduated vernier scale.  Here is...___ Electronics Projects for You

Illumination Circuitry for Liquid Crystal Displays -  Linear Technology AN49 __ Designed by Jim WilliamsAug 23rd, 1992

Illuminationry for Liquid Crystal Displays -  AN49 Current generation portable computers and instruments utilize backlit liquid crystal displays.  The back light requires a highly efficient, high voltage AC source as well as other supply circuitry.  AN49 details these circuits and also includes sections on efficiency___ Linear Technology/Analog Devices

Interface LCD with ease -  04/27/00 EDN-Design Ideas Alphanumeric LCDs find use in various embedded systems.  In these systems,µCs often lack I/O resources, so you must make optimum use of the available resources.  LCDs have a bus-oriented interfacing structure, which consumes 11 I/O lines (eight data lines and three control lines).  You cannot always afford to spare this many I/O lines.  __ Circuit Design by Bharat Mehta, Space Applications Center, Ahmedabad, India

Interfacing 16x2 Character -  LCD to parallel port __ Designed by Craig Peacock


Digital Readouts:  #'s C      D - K      LN      M - R      S - Z


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