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LCD (Liquid Crystal Display) Circuits
LCD Circuits: #s - H      I - O      P - Z


Last Updated: October 24, 2017 02:55 PM

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

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

LCD 2 USB -  LCD2USB is a open source/open hardware project.  The goal of LCD2USB is to connect HD44780 based text LCD displays to various PCs via USB.  LCD2USB was meant to be cheap and to be made of easily available parts.  It is therefore based on the Atmel AVR Mega8 CPU and does not require any difficult to obtain parts like separate USB controllers and the like.   __ Designed by Till Harbaum <Till @ Harbaum.org>

LCD 2x16 characters &  4x4 keypad assembly example -  Connect some 2x16 characters LCD display and 4x4 keypad with AVR microcontroller __ Designed by Jerry Meng

LCD Bias & Backup Supply Applications for the LT1316 Micropower DC/DC Converter -  DN166 Design Notes__ Linear Technology/Analog Devices

LCD clock based on AVR Attiny2313 -  The clock is working a 24 hour period.  The time is displayed in the format "hh: mm: ss" on the alphanumeric display of size 16 x 2  (columns x rows) with driver HD44780.  The use of a backlit display gives the impression of great visual at night.  Instead, use a full stop or semicolon blink I used options available in the Bascom and created their own simple animation changing every second.  With such simple design to evaluate the accuracy of the clock is good.  Accuracy was +1 second / 48 hours.)  __ Designed by Szymon Dyja

LCD Clock/Calendar -  LCD Display with Date and Time, 12hr format.   __ Designed by Jose Pino

LCD Display with Minimum Mass Wireless Coupler -  Its an adaption of the 2X 16 LCD project, by adding a fettite loop antenna, two resistors, and a capacitor.  Here the display shows the output of the 10 bit scanning voltmeter with Minimum Mass Wireless Coupler.     (ATtiny2313, AT90S2313)  __ Designed by Dick Cappels

LCD Frequency Counter -  This frequency counter module is intended as a "digital dial" frequency readout for portable QRP radio tranceivers.  It uses only six standard discrete logic IC's, i.e.  no PIC or other microcontroller, no programming to be done, etc.  The readout is designed to show kHz from the band edge with 100Hz resolution, i.e.00.0kHz to 99.9kHz.  The display updates ten times per second, which I have found to be a comfortable rate for tuning.  The current consumption is 1.4mA, very suitable for portable  (battery powered) operation.  The size of the counter is 2.3 x 1.6 x 0.8 inches  (58 x 41 x 20mm)  __ Designed by Hans Summers

LCD Frequency Counter PIC16F84 -  Schematic Only __ Designed by © Peter Halicky  OM3CPH

LCD Interface Saves µC I/O Pins -  12/12/97 EDN-Design Ideas Although in abundant use, mini microprocessers suffer from a low I/O-pin count, which places each pin at a premium.  Interfacing a bus-type device, such as an alphanumeric LCD, can use most of the I/O pins.  Even placing the display in the 4-bit transfer mode __ Circuit Design by Robert Wells, ETR, Moab, UT

LCD Panel Meter -  How to make a volt and amp meter for your battery bank.  Click Here

LCD Power Supply Provieds +/-15V LED Power -  Magazine Design Idea  s May 2004__ Linear Technology/Analog Devices

LCD Serial Terminal -  has RS-232 serial in/out, up to 20 programmable keys, Character LCD up to 2x40, 5 auxiliary inputs, 6 auxiliary outputs __ Designed by Bob Blick

LCD Terminal -  The LCD Terminal just like a normal terminal, it can connect to any host via RS-232 serial cable.  A PC keyboard must connect to it as the input device and what ever you type will send to host via RS-232 and display on a 40x4 LCD.  Data receive from host can also display on the LCD unit.  You can use this device as any Unix/Linux machine's console.  

LCD thermometer -  In this page, I introduce the LCD thermometer which is sold by "Akizuki Denshi Tsusho".  At this thermometer, the IC thermo sensor  (S8100) or the diode  (1S1588) is used as the thermo sensor.  When using the IC thermo sensor, the thermometry to +100°C from -40°C is possible.  Also, when using the diode, the measurement to +150°C from -20°C is possible.  Both sensors are contained in the kit.   __ Designed by Seiichi Inoue

LCD thermometer using PIC16F871 -  Build your own temperature meter for fun.  This project uses the Microchip TC77 digital temperature sensor,  a PIC16F871 microcontroller and a 7-segment 3˝ digit LCD.  You can study the source code on how to drive an LCD display.   __ Designed by Peter Jakab

LCD interface takes two wires -  EDN-Design Ideas March 26, 1998    [ NOTE : File has multiple design, scroll for this one.]  Alphanumeric LCD modules can provide an attractive display for a project, but their parallel I/O lines require a large number of outputs from a µC. For example, a direct LCD interface would consume all of the I/O pins of a small µC, such as the eight-pin PIC12C508 from Microchip Technology  (Chandler, AZ) . __ Circuit Design by Ed Maste, Jem Designs, Pickering, ON, Canad

LCD2LPT with LIRC -  The "LCD2LPT with Lirc" circuit is the compilation of two circuits found on the net on a single board.  The first is LCD to LPT interface and the second an IR remote control interface using http://www.  lirc.  org program.   __ Contact: IQ Technologies

LCD2USB. Part 1 -  Overview LCD2USB is a open source/open hardware project.  The goal of LCD2USB is to connect HD44780 based text LCD displays to various PCs via USB.  LCD2USB was meant to be cheap and to be made of easily available parts.  It is therefore __ Designed by Till Harbaum

LCD2USB. Part 2 -  Uploading the firmware If you are familiar with Atmel programming you probably know what you are doing.  The Makefile in lcd2USB/firmware/Makefile assumes, that you are using a simple STK200 compatible printer port adapter.  Connect the __ Designed by Till Harbaum

LCD-Bias Generator Uses Main Microcontroller as Control IC -  11/26/09  EDN-Design Ideas Control a buck-boost switch-mode regulator with the same microcontroller that sends data to an LCD __ Circuit Design by Tom Hughes, Dannemora, Auckland, New Zealand

LCD-bias supply provides precise tracking -  05/03/01 EDN-Design Ideas Small monochrome LCD systems often require split  (dual) -bias supplies with precise voltage tracking to prevent plating of the LCD.  The circuit in Figure 1 provIdeas±18 to±20V adjustable LCD bias voltages with 1% tracking accuracy.  The circuit operates from a single 4.2 to 2.5V Li-ion cell for portable monochrome LCD applications.   __ Circuit Design by David Kim

LCDs Implement Bar-Graph Displays -  09/12/97  EDN-Design Ideas You can easily implement LCD bar-graph displays in cost-sensitive designs by using widely available, low-cost, alphanumeric LCDs.  Bar-graph displays indicate voltage, current, power, battery and fuel gauges, and sound level  (in deci __ Circuit Design by Sergio Zigras, Paramus, NJ

LED 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

Low-Cost LCD-Bias Generator Uses Main Microcontroller as Control IC -  26-Nov-09 EDN-Design Ideas Control a buck-boost switch-mode regulator with the same microcontroller that sends data to an LCD __ Circuit Design by Tom Hughes, Dannemora, Auckland, New Zealand

Low-cost LCDs implement bar-graph displays -  12-Sep-97 EDN-Design Ideas You can easily implement LCD bar-graph displays in cost-sensitive designs by using widely available, low-cost, alphanumeric LCDs.  Bar-graph displays indicate voltage, current, power, battery and fuel gauges, and sound level (in decibels], for example.  The method uses a 16-character-by-one-line.    __ Circuit Design by Sergio Zigras, Paramus, NJ

LT1399/LT1399HV Triple 300MHz Current Feedback Amplifiers Drive Component Video & LCD Displays -  DN213 Design Notes__ Linear Technology/Analog Devices

Microcontroller Drives LCD with Just One Wire -  3-Dec-07 EDN-Design Ideas A Microchip PIC10F family microcontroller sparks an HD44780 LCD using a single I/O pin __ Circuit Design by Noureddine Benabadji, University of Sciences and Technology, Oran, Algeria

Minimum Mass Waveform Capture & Display -  The result was a project that includes a waveform capture circuit, a graphic LCD  (Liquid Crystal Display) and a control panel with LED indicators.  The details of the Graphic LCD display unit, composed of the LCD module, a serial interface, and bias supply were published earlier on this site,  __ Designed by Dick Cappels

Multifunction LCD Clock with Raspberry Pi With just two simple Python files, an inexpensive LCD display and a low-cost digital temperature sensor, you can turn Raspberry Pi into a beautiful LCD clock with IP address and temperature...__ Electronics Projects for You

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 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

One IC Biases LCD & GaAsFET Amplifier -  04/09/98 EDN-Design Ideas -  (File ,contains several circuits, scroll to this one) Operating from a lithium-ion cell or a four-cell NiCd battery, the circuit in Figure 1  provIdeas 6V bias for LCDs and a separate, quiet negative bias for a GaAsFET power amplifier.  This bias combination exists in cell phones __ Circuit Design by John Wettroth, Maxim Integrated Products, Apex, NC

One wire brings power & data to LCD Module -  01/27/14EDN-Design Ideas If you need to connect a small remote LCD display, or your µC has run out of I/O pins, here’s a good, cheap solutionEmbedded systems frequently use HD44780type LCD displays as it is considered the most popular alphanumeric display controller.  The interface comprises at least 14 pins: eight for data, three for control    (EN, WR, RS) , two for power supply    (Vdd, Vss) , and one for contrast    (Vre) .  Configured in 8bit mode, it requires at least 10 I/O lines    (D0D7, EN, RS) .  Configured in 4bit mode, it requires at least six I/O lines    (D4D7, EN, RS)  __ Circuit Design by Benabadji Noureddine

One wire controls LCD Module -  EDN-Design Ideas 03/20/2017    This one-wire LCD interface DI generates all the signals required to control the ubiquitous character display __ Circuit Design by Rex Niven


LCD Circuits: #s - H      I - O      P - Z

 


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