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Display Circuits

�P Displays 10 Bit Data on Three Leds: 11/07/96 EDN-Design Ideas

2 Wire LCD Interface using PIC16CF84:

7 Segment LED Counter:

72 LED Clock:

9 Second Digital Readout Timer:

Bar graph display:

Big LED Clock:

Caller ID / DTMF Audio Decoder:

Caller ID Circuits: information and circuits for different systems used USA and Finland

Caller ID Decoder Part 1:

Caller ID Display Service: Caller ID decoder based on 68HC11, text in French

Caller ID:

Car Message Display: CaMeD was designed and built to be used in an automobile. Its purpose is to display various symbols/messages to the car driver traveling behind you. It uses1024 LEDs to form a32 x32 matrix display. A total of12 symbols/messages can be displayed,4 of them being user-definable by using a visual basic utility tool connected to the rs232 port of a PC.

Circuit controls brightness of multiple displays: 05/30/2002  EDN - Design Ideas / I recently needed to control nine seven-segment displays for a microcontroller's serial port. The complication I faced was the need to provide a continuous brightness adjustment for all the digits—from completely dark to fully bright. I couldn't easily use the obvious solution of a string of 74HC595 serial-to-parallel converters driving the segments through series resistors, because I wou....

Circuit Thermally Compensates LCD Contrast Bias: 03/16/95 EDN-Design Ideas

Easily Display Bit Map Images on Small graphic LCDs: 11/19/98 EDN-Design Ideas

Electronic Lock:

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 character…

Excel offers painless LCD initialization: 09/20/2001 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. Alternatively, you ca.

Flashing Christmas LED Display:

GPS LCD Display Project:

Graphic LCD Interface:

Interfacing 16x2 CharacterLCD to Parallel Port:

LCD Interface Saves �C I / O Pins: 12/12/97 EDN-Design Ideas

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.

LCD Thermometer:

LED Barograph Driver:

LED driver displays standing wave ratio: 03/18/99 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit

LED Sign: uses two LED arrays to form a 7 X 10 matrix. It produces moving messages or animations stored in an EPROM.

MAX924 Bar graph Level gauge:

Nixie Tube Clock:

PIC 5x7 Display:

Picxie 2 8x8 Animated LED Signboard:

Seven segment LCD uses two wire interface : 09/04/03  EDN-Design Ideas / You can connect seven-segment LCDs using only a two-wire interface (Figure 1). The two-wire interface may be at the field-effect, direct-drive LCD or at a serial interface (such as I2C) that uses an eight-pin microcontroller. The design in Figure 1 uses an Atmel (www.atmel.com) ATtiny12 microcontroller, IC1....

Simple LCD Interface Takes Two Wires: 03/26/98 EDN-Design Ideas

Solar Car Display Controller Schematic:

Switch Configures Bare Bones, Two Digit Display: 12/21/95 EDN-Design Ideas

TeleTEXT Devices:

Time / Date / Message Video Overlay Generator!: video text overlay circuit

Tone Display System: This device gives visual feedback of which note you're playing, so you can set up the note before bringing up the volume to sound it. It features a 40-LED display, for over three octaves of range at any given time. Furthermore, a three-position switch extends the range by two octaves, for a total usable range of over five octaves.

Two Wire LCD Interface using PIC16CF84:

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