praveen @ circuitstoday.com writes:
LCD modules form a very important part in many arduino based embedded system designs. So the knowledge on interfacing LCD to arduino is very essential in designing embedded systems. This article is about interfacing a 16×2 LCD to Arduino. JHD162A is the LCD module used here. JHD162A is a 16×2 LCD module based on the HD44780 driver from Hitachi. The JHD162A has 16 pins and can be operated in 4-bit mode or 8-bit mode. Here we are using the LCD module in 4-bit mode. First, I will show you how to display plain text messages on the LCD module using arduino and then few useful projects using LCD and arduino. Before going in to the details of the project, let’s have a look at the JHD162A LCD module.
Interfacing LCD to Arduino uno - [Link]
During SOS webinar with 4D Systems you could find out how graphic processor Diablo 16 can make our work easier and shorten time necessary for the development.
Get to know the performance and user-friendly graphic processor Diablo 16 - [Link]
Hemal Chevli wrote an article detailing his new tool the GLCDTerm that reads serial data without PC on GLCD:
I’m calling it GLCDTerm(spin-off from GTKTerm), this handy tool reads TTL serial data and displays it on GLCD. This is the first time I’ve used a GLCD in any of my projects. It runs on m328 using arduino bootloaer and the awesome GLCD library. I first made a prototype on one of my arduino clones, Below is the video running diagnostics program.
Read serial data without PC on GLCD – [Link]
Displays called as “Electronic ink” or “e-Paper” are a real electronic form of a paper.
For those of you, who are not familiar with this type of displays yet, we´l mention, that it´s a so called electrophoretic display, i.e. Display containing white particles in microcapsules dispersed in a thin layer of a dark high-viscosity liquid. These particles can be moved or turned by a short voltage impulse, what will cause a given pixel to appear as white. Similarly an impulse of a reverse polarity will cause a given pixel to appear as black or it can also be grey (usually 4 shades of grey). High viscosity of a liquid causes that microparticles remain their position practically forever (years). That means, that this type of displays only need an electric energy to change a displayed content (!). In other words it´s an ideal display for battery powered devices. From some point of view is the behavior of ePaper display similar to bistable (latching) relays. A display is reflexive, i.e. doesn´t require backlight but for a good legibility at least a low ambient light is necessary. It´s advantageous that the display is easily readable even on a direct sunlight. A charm of ePaper display is also in the fact, that a displayed content is really similar to that sketched/ written on a paper. The first type of ePaper displays in our offer is a 2“ (172*72 px) display from company Electronic Assembly EAEPA20-A. The module is only 1.18mm thin and it only needs a few additional components for its operation. Power supply is single – 3,3V (no other voltages are required) and the display contains a standard controller SSD1606 with a 4-wire SPI interface.
Detailed information will provide you the EA_ePaper datasheet. Upon request, company Electronic Assembly is able to produce any ePaper display up to 300×300 mm size (MOQ 1000 pcs).
Display displaying without a power supply is available even for you - [Link]
Maybe the most well designed reflow oven controller out there @ andybrown.me.uk:
It’s been so long since I had the idea for this project that I can’t remember why I had the idea in the first place. At least I blame it on the passage of time although this engineer is getting on a bit now so it could easily be memory rot on my part. So here we are then, a reflow oven controller. Let’s quickly recap what a reflow oven is for those that are new around here.
The two main processes used in industry to build printed circuit boards are wave soldering and reflow using a very large industrial oven that you probably can’t afford and if you could afford to buy it you probably couldn’t afford to house or run it.
An open-source Cortex-M0 halogen reflow oven controller with TFT LCD - [Link]
This week FTDI Chip have announced a range of Arduino-compatible development platforms to support the company’s Embedded Video Engine (EVE) technology. The VM800P series provides engineers with everything necessary to implement Human Machine Interfaces (HMIs) featuring display, audio, touch elements and data processing aspects too.
The units can be programmed using the standard Arduino IDE (using a pre-programmed Arduino-compatible bootloader). In addition to support for various Arduino libraries, every VM800P incorporates an FTDI Chip FT800 EVE graphic controller IC and its FT232R USB interface IC as well as an ATMega328P 8-bit microcontroller running at 16 MHz. Also featured are a touch-enabled display LCD panel, a backlight LED driver, an audio power amplifier and a micro speaker. A choice of 3.5, 4.3 and 5.0-inch display formats is available which have precision fitted bezels to enable operation in industrial environments. The VM800P units also have a USB serial port for firmware upload and application communication, a battery-backed real time clock (RTC) for carrying out system timing and a micro SD socket loaded with a 4GByte SD card containing sample applications. [via]
Embedded Video Engine for Arduino - [Link]
by Kalle Hyvönen:
I needed a display for a project of mine and was just going to use a regular HD44780 -based text LCD display, until I spotted some very neat looking TINY OLED-displays from eBay.
The displays are monochrome 128×32 pixel displays with a 4-wire SPI bus and they are around 30x11mm in size (the actual display area is under an inch diagonally!). The exact type of the displays is UG-2832HSWEG04. I found a datasheet for the displays and a datasheet for the actual display controller (SSD1306) and they seemed easy enough to use so I ordered a two of them for just $13.
Using a neat little OLED-display with an Arduino - [Link]
This instructable will show you how to build a portable Touch Screen Oscilloscope for less than 40 U$! johnag @ instructables.com writes:
The oscilloscope is one of the most powerful electronic instruments that is available to electronics hobbyist, experimenters, and engineers. It is mainly used to measue time-varying signals. Any time you have a signal that varies with time( slowly, quickly, and /or periodically ) you can use an oscilloscope to measure it , visualize it, and to find any unexpected features in it.
Make an Oscilloscope using the SainSmart Mega2560 - [Link]
Martin Thomas shows us how to interface Atmel AVR witg graphic LCDs:
This is a C-library for avr-gcc/avr-libc to access SED1520-based graphics-LCDs. The modules used to develop the library only support “write to LCD”, read-modify- write on the display RAM is not possible. So this Library uses a “framebuffer” which holds the display-content in the AVR’s SRAM. For a 122*32 pixel display around 500 Bytes of SRAM are occupied by the buffer. The library does of cause support modules which can be read in “write-only-mode” (tie the R/W-Pin to GND).
Interfacing Atmel AVR with Graphics Liquid Crystal Displays (GLCDs) - [Link]
bgyroscope @ www.instructables.com writes:
This instructable will show you how to build your own stopwatch to record multiple splits using an ATmega328 programmable microcontroller. When one presses the start button (or slaps the metal band in my watch), the screen displays the last lap for a second then continues the time on the next lap. It’s great for all you runners out there doing an interval workout.
Lap Stopwatch with ATmega328 Microcontroller - [Link]