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

 

Last Updated: October 24, 2017 02:54 PM


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

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 bargraph ammeter for your car -  It's easy to build and even easier to connect.___ SiliconChip

LED Bar-Graph Display Represents Two Digits -  09/22/11  EDN-Design Ideas Use a counter IC to drive two sets of four LEDs.  The circuit in this Design Idea makes a voltmeter that reads to 0.99V.  The idea uses a counter IC to drive two sets of four LEDs (Figure 1).  Each of these two sets represents a BCD (binary-coded-decimal) value.  With all of the LEDs off, the voltmeter reads 0V.  With all of the LEDs on, the reading is 0.99V.  Op amp IC1A generates a predictable voltage ramp.__ Circuit Design by Raju Baddi, Tata Institute of Fundamental Research, Pune University, Maharashtra, India

LED Clock -  12Hr LED clock using 16F628.  Also, schematic to build a Jumbo clock is included __ Designed by Jose Pino

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

LED Moving Sign 7 x 10 -  This sign uses two LED arrays to form a 7 X 10 matrix.  It produces moving messages or animations stored in an EPROM.  It uses no microprocessor.   As in most electric signs, the LEDs are matrixed, and strobed very quickly.   __ Designed by Bob Blick

LED Relay Timer -  This circuit provides a visual 9 second delay using a 7 segment digital readout LED.  When the switch is closed, the CD4010 up/down counter is preset to 9 and the 555 timer is disabled with the output held high.  When the switch is opened,  __ Designed by Bill Bowden

LED-Based Message Display -  This LED-based message display is built around readily available, low cost components.  It is easy to fabricate and makes use of 3mm red LEDs.  A total of 172 LEDs have been...___ Electronics Projects for You

LM3916 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

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


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

 


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