If you have used LCDs in projects before you have realized that to use the backlight on a LCD display you need large positive and negative voltages. This circuit will help you create the voltages you need from a simple 2.5V to 6V input. I chose this circuit since many of my projects run off of two AA batteries. The one IC in this circuit, LT3587, generates two positive and one negative high voltage supply.
Here is the circuit.
LCD Display Backlight Power Supply Circuit – [Link]
Graphic programming environment 4D ViSi-Genie enables an unbelievably simple programming without necessity to write a single line of code!
4D ViSi-Genie is a part of the Workshp4 IDE software package, intended for intelligent graphic displays from company 4D Systems. When we mentioned in the article “Focus at the main subject – application itself and the 4D ViSi will take care about its look” that “programming of a graphic interface perhaps cannot be any simpler “, we didn´t guess that it can be…
Company 4D Systems released a new version of the program 4D Workshop4 IDE with a new fully graphic editor Visi Genie. Visi Genie means a real break-through in programming of graphic displays. To create a simple graphic interface (GUI), literally a few seconds are sufficient and the user doesn´t need to write a single line of code. The 4D Workshop4 IDE tool contains 4 main parts: Designer, Visi, ViSi-Genie and Serial enabling programming and setting of 4D Systems display. The Visi-Genie tool itself supports all 4D Systems displays with the Picaso processor.
Genially simple and fast programming of 4D Systems displays – [Link]
Visual TFT is a standalone application used for rapid development of graphical user interfaces for TFT displays. Software generates code compatible with mikroElektronika compilers: mikroC, mikroBasic and mikroPascal, for all suported MCU architectures: PIC, dsPIC30/33, PIC24, PIC32, AVR and ARM. Software implements intuitive environment and many drag-and-drop components which can be used for building applications easily and fast.
Visual TFT – Rapid development of GUIs in TFT displays – [Link]
Ktulu @ users.ininet.hu/ktulu/ writes:
The heart of the unit is an 8 bit PIC16F74 microcontroller from Microchip. It’s main task is to constantly monitor the room temperature trough a 1–wire digital thermometer IC, a DS1820 from Maxim, and to switch a relay on or off, that controls the gas boiler accordingly.The system also features a color LCD, which was removed from an old mobile phone, a few LED’s, an LDR sensor for night mode and a couple of pushbuttons.
PIC16F74 – Room thermostat with colour LCD – [Link]
EA DIP series displays from company Electronic Assembly provide an uncommon possibility to choose a graphic or a character display without a change of your device´s hardware.
A quality display with a high contrast and an automatic temperature compensation, easy mounting by soldering of pins into a PCB, a display maximally utilizing the module size – without overhangs and mounting openings, compatibility with industry standard graphic controllers (HD44780), low power consumption – all these are the features saying in favor of EA DIP series displays. To these benefits of EA DIP series, we can also add another uncommon feature – a possibility to change a character display for a graphic one without a change in hardware (at types of the same size). EA DIP series consists of several types as you can see in the following table.
Types with the same dimensions, for example the graphic EA DIP122J (122×32) and character EA DIP162J (2×16) and EA DIP203B (4×20) feature the same pinout, that´s why it is possible to use these types into the same PCB (at a modification of firmware of your device and meeting requirements of given types). It provides an elegant way how to create various versions of a product or to maintain a possibility of “upgrade” of your device from a character- to a graphic display.
Detailed description will provide you the EA DIP flyer, as well as datasheets at particular types. A novelty in our portfolio is the type EA DIP203B, which will replace the EA DIP204.
In case of interest in Electronic Assembly products, please contact us at firstname.lastname@example.org.
EA DIP displays – a free hand at a choice of a character or graphic display – [Link]
Embedded Lab has started a new tutorial series on Netduino programming and interfacing. This is the second tutorial in the series where interfacing between an HD44780 based character LCD and Netduino Plus is discussed.
Netduino and LCD interfacing tutorial – [Link]
In a wide portfolio of development tools for displays from company Electronic Assembly can be found evaluation boards for development of applications with eDIP displays family, including a connectivity via all common industrial interfaces.
Everyone who already ever designed his own development board knows, that it takes a lot of time to design, construct and assemble such a board. That´s why a ready-made development board at an affordable price is always a big simplification. EA EVALeDIP320-TFT70 development kit is a beautiful example of such a set, as it provides an immediate access to a full display functionality and it comes rich-equipped. At the same time it meets a criterion of an acceptable price, because the difference in price of the development board and the display itself is approx. 50 Eur only.
EA EVALeDIP320-TFT70 enables to develop applications in an elegant way and to use all possibilities of 5.7“ and 7“ Electronic Assembly displays. The development kit contains an evaluation board (USB), 7″ display with a touch panel, CD with SW and drivers, 5 small PCBs enabling a communication through industrial interfaces (RS232, RS485, I2C, SPI and RS232-CMOS level), USB cable and a line adapter. The development kit enables to also develop applications, which use input/output pins of the display – 8 push-buttons and 2 trimmers enable to control I/O pins and simulate analog signals, while 8 LEDs indicate logic levels at the corresponding outputs. Another LEDs indicate data traffic and a beeper/ loudspeaker serves as a touch feedback. An advantage of Electronic Assembly displays is, that black-anodized aluminium frames (bezels) are available for many types.
Further information will provide you the EA EVALeDIP320-TFT70 and EA eDIPTFT70-A datasheets. A 5.7” display will be available in the nearest period. In case of interest in Electronic Assembly products, please contact us at email@example.com
Simulate, test, develop – Electronic Assembly evaluation tools will help you – [Link]
I like fast things. And good code. Often, they go hand in hand. This is a demo of my optimized library, LiquidTWI, pushing data out to the LCD almost as fast as the “native” (direct) interface with LiquidCrystal. Only this time, using just 2 wires (TWI).
LiquidTWI2 – A Lean, High Performance I2C LCD Library for Arduino – [Link]
New intelligent display eDIPTFT70 from Electronic Assembly provides all what its smaller relatives and something in addition – the size.
With the 7” size and an 800 x 480 pixels resolution, it can display a relatively considerable amount of information. Similarly like other member of family eDIP (eDIPTFT32 a eDIPTFT43), even eDIPTFT70 eliminates the need of demanding and time-consuming programming at pixels level.
All the control of the display is done on commands level, thus to display text, graphics and many other symbols is exceptionally easy and simple. Control by commands substantially accelerates development and shortens the time to market. At an application development it is possible to use predefined functions, symbols and geometric functions, bargraphs, frames, buttons and many other. In general eDIPTFT70 offers almost the same functions like other eDIPTFT family members, including almost immediate start within a few 1/10 of second.
Single +5V supply, analogue touch panel with a variable raster and software-dimmable backlight brightness contribute to the versatility of usage. In many of applications also 80 various short jingles for audio feedback can be useful. Even eDIPTFT70 contains 3 communication interfaces – RS232, I2C and SPI, that´s why it can be connected to virtually any device. Further information will provide you the eDIPTFT70 datasheet.
New 7″ eDIPTFT70 display – when the size matters – [Link]
The TWIDisplay 8-digit LCD is an easy to use 8-digit 14-segment transflective LCD display. Libraries for Arduino and avr-gcc are available on GitHub.
Only four wires are required for operation, one for power (runs on both 3.3V and 5V), one for ground, and two for the TWI protocol. To control a display like this, a dedicated controller chip is required.
TWIDisplay – 8-digit 14-segment LCD – [Link]