Electronics-Lab.com Blog

This is a cheap alternative to serial LCDs. This post is based in the work made previously by tomek in wiring LCD displays using 4 bits. The basic idea is to group the 7 pins that are needed to drive the LCD in only 3 using a shift register. [via]

3 wires interface for LCD display - [Link]

This article discusses how to overwrite bytes in the CGRAM to display custom bit-map graphics on a Hitachi HD44780-compatible character LCD display. A method is described of transforming a raster image to an array of values that are a monochrome bit-map representation of the original.

Printing Custom Characters on a Character LCD - [Link]

This project requires a basic IC operates as a linear voltmeter with a 1.2v range. The LM3914N to be used for this project.It is a chip specially designed to drive a bargraph display,using 10 leds as the scale. This project needs is to get full power showing all 10 leds lit, with just the bottom led lit when the fan controller is turned right down to around 6v. [via]

A bargraph display - [Link]

This project’s display is made of a number of tiles, about 2″ square with an 8 x 8 array of color LED pixels. Each tile is individually powered and animated, so your can freely pick them up and re-arrange them. To set up a display, the tiles are placed in a special tray. Animations are downloaded into the tray via Ethernet and stored locally on an EEPROM, or loaded via an SD card. The tray broadcasts the animation to each of the tiles, and then synchronizes them.

If the pieces are left in the tray, the animation can be updated continuously over the Ethernet connection. If the tiles are removed from the tray, they’ll display the animation for several hours with their own re-chargeable battery power. Once the animation is synchronized and running on the tiles, you can pick them up and place them anywhere.

Dynamic Tiled display - [Link]

Use two mirrors, two motors to move the mirrors, a laser pointer, and a PIC microcontroller with serial input to receive the image from the host computer and control the mirrors and laser. The image will be conditioned in and transferred by Processing. The result will be an image that looks a bit like a bit big POV or a red and black old style computer display. [via]

Laser Display - [Link]

Ladyada posted a thorough tutorial regarding Arduino to LCD wiring -

For a soon-to-be-released project I needed to have a character LCD display. I’ve got a box with a few of those $10 parallel LCDs that are so popular. There’s even a few libraries at the Arduino playground for easy use. Dave Fowler from uCHobby even started out with a great tutorial. However, I didn’t see any good tutorials on how to do the actual -connecting- part. So I took pix while I wired up one to a protoshield and tested it. [via]

Use an LCD with Arduino - [Link]

This Bargraph can be modified to run like a knight rider bar, or simply move a light from side to side, its up to you. The project is very simple, few parts involved, even if it contains a micro-controller, its still simple. The source code is written in C and can be compiled using GNU C WINAVR compiler. [via]

Bargraph 101 LED display - [Link]

Music equalizers are traditionally broken up into the different frequency ranges in order to “equalize” the sound that comes out. The equalizer display that we’ll make in this tutorial will just be based off of the straight music signal.

An amplitude based equalizer isn’t terribly useful however it still looks cool =D and you’ll learn how to use the A/D converters on the pic. The audio signal we’ll use will be generated from a laptop then converted and understood by the pic.

Music Equalizer Display - [Link]

Wow, this is the biggest LED matrix display i ever seen made in a DIY project. Seven 74ABT574s provide the row drive and 10 column transistors with the whole display refreshed 100 times a second. If you consider starting this project, you have to have some experience, its not suitable for beginners because of it’s complexity and lack of information about building it. [via]

560 LED matrix display - [Link]

crazyrobotsoftware.com writes : As an educational experiment, I decided to build a small temperature sensor, and data logger. Since I have little experience with direct Analog to Digital (A->D) converters, I decided to start out with a little more “meaty” hardware. I used a Basic Stamp II (BOE) BS2-IC microcontroller to capture temperature using a Sensirion Temperature and Humidity Sensor, and display using a 2×16 Serial Display. [via]

PIC Microcontroller Temperature Sensor - [Link]