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LCD (Liquid Crystal Display) Circuits, Page 3
LCD Circuits: # - D      E - K      L - P     Q - Z
Last Updated on: Friday, March 12, 2010 12:07 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. ….(circuit design added 11/08)
LCD 2x16 characters &  4x4 keypad assembly example  - Connect  AT90S2313 with LCD display 2x16 char  and 4x4 keyboard (keypad). Its not any special code  (short or fast code) but its very good for beginners….(electronic schematic added 05/09)
LCD Bias and Backup Supply Applications for the LT1316 Micropower DC/DC Converter - DN166  Design Notes (Linear Technology) (app note added 1/06)
LCD Bias Supply Provides Precise Tracking - 05/03/01 EDN-Design Ideas / (added 1/06)
LCD Clock/Calendar - LCD Display with Date and Time, 12hr format. (circuit added 12/04)
LCD Display - (application / block diagram added 6/07)
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)….(schematic added 6/07)

 

LCD Frequency Counter PIC16F84 - (electronic circuit added 1/06)
LCD Fundamentals using PIC16c92x Microcontrollers - Microchip Application Note Published 26-Aug-97   (app note added 2/06)
LCD Interface Saves µC I/O Pins - 12/12/97 EDN-Design Ideas / (added 1/06)  
LCD Monitor - (application / block diagram added 6/07)
LCD Power Supply Provieds +/-15V LED Power - Linear Technology Magazine Design Ideas May 2004 (app note added 1/06)
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. (added 7/03)
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. ….(circuit design added 11/08)
LCD thermometer  - 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…..(design added 02/09)
LCD Thermometer (Seiichi Inoue) - (app note added 6/03)
LCD to PIC16c54 Schematic - (electronic circuit added 1/06)
LCD Triplex Drive with COP820cj - National Semiconductor Application Note   (app note added 2/06)
LCD2LPT with LIRC  - (circuits added 08/08)
LCD-TV Panel - Intersil Application Block Diagram  (app note added 6/06)
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. The 32 minute duration is set by selecting the 5th bit (2^5 = 32) of a 4040 binary counter (pin 2). The timer also has a manual toggle switch so the load can be manually switched on or off and automatically shuts off after 32 minutes....(electronic circuit added 10/05)
Low Cost LCDs Implement Bar Graph Displays - 09/12/97 EDN-Design Ideas / (added 2/06)  
LT1399/LT1399HV Triple 300MHz Current Feedback Amplifiers Drive Component Video and LCD Displays - DN213  Design Notes (Linear Technology) (app note added 6/06)
Microcontroller drives LCD with just one wire - (Design Ideas - EDN, 12/3/2007  A Microchip PIC10F family microcontroller sparks an HD44780 LCD using a single I/O pin. (electronic design idea added 9/2008)
New CCFL Power Supply Expands Automotive Applications for Back Lit Liquid Crystal Displays - MicroNote 1402 from Microsem  (app note added 6/06)
Nokia 3310 LCD & PIC12F629 Thermometer - English version link (electronic design idea added 09/08)
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.….(circuit design added 06/09)
PIC LCD and Keypad Driver - (circuit / schematic design added 6/06)
Pot Adjusts LCD's Contrast - 02/04/99 EDN-Design Ideas  / (added 6/06)   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 from a menu and then use up or down buttons with µC IC1 to adjust the contrast. The µC stores the contrast value in the potentiometer, IC2. This design uses a Xicor 10-k unit (dubbed "EEPOT"), but you could use other devices in the design.  The EEPOT connects to the LCD's VO line. You could connect....
Potentiometer Controls LCD Bias - 03/17/94 EDN-Design Ideas / (added 11/06) 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 logic can control the -24V-dc LCD bias using two general-purpose I/O command lines. The DS-1669 from Dallas Semiconductor...
Precision Wideband Current Probe for LCD Backlight Measurement - DN101  Design Notes (Linear Technology) (app note added 6/06)
Processor's PWM Output Controls LCD/LED Driver - 05/27/04 EDN Design Ideas  /  (added 1/05)The PWM (pulse-width-modulation) output available from many microprocessors is based on an internal 8or 16-bit counter and features a programmable duty cycle. It is suitable for adjusting the output of an LCD driver, a negative-voltage LCD driver, or a current-controlled LED driver. cost alternative that provides not only a 4to 20-mA output,

           
LCD Circuits: # - D      E - K      L - P     Q - Z
 
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