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This graphic LCD module acts as a shield for Arduino Uno-style microcontrollers. The pins on the carrier board match up to the Arduino Uno"s ports, so the module simply presses on and is fully and correctly connected. Plus, this carrier board is able to be connected to either a 3.3v logic level or a 5v logic level device. (Read our blog post if you have questions about logic level.)

At 2.2" diagonal, this transflective display is big enough to get all the information across. Plus, it"s readable in most lighting environments, from indoor light to direct sunlight. If you"re looking for a display that can be read in low-light situations, check out the backlight version of this display. This display has a 128x64 monochrome array, plus a row of addressed icons along the top edge of the display.

Power Fx is the low-code language that will be used across Microsoft Power Platform. It"s a general-purpose, strong-typed, declarative, and functional programming language.

Power Fx is expressed in human-friendly text. It"s a low-code language that makers can work with directly in an Excel-like formula bar or Visual Studio Code text window. The "low" in low-code is due to the concise and simple nature of the language, making common programming tasks easy for both makers and developers. It enables the full spectrum of development from no-code for those who have never programmed before to "pro-code" for the seasoned professional, with no learning or rewriting cliffs in between, enabling diverse teams to collaborate and save time and expense.

Microsoft Power Fx is the new name for the formula language for canvas apps in Power Apps. This overview and associated articles are a work in progress as we extract the language from canvas apps, integrate it with other Microsoft Power Platform products, and make it available as open source. To learn more about and experience the language today, start with Get started with formulas in canvas apps in the Power Apps documentation and sign up for a free Power Apps trial.

Power Fx binds objects together with declarative spreadsheet-like formulas. For example, think of the Visible property of a UI control as a cell in an Excel worksheet, with an associated formula that calculates its value based on the properties of other controls. The formula logic recalculates the value automatically, similar to how a spreadsheet does, which affects the visibility of the control.

Also, Power Fx offers imperative logic when needed. Worksheets don"t typically have buttons that can submit changes to a database, but apps often do. The same expression language is used for both declarative and imperative logic.

Power Fx will be made available as open-source software. It"s currently integrated into canvas apps, and we"re in the process of extracting it from Power Apps for use in other Microsoft Power Platform products and as open source. More information: Microsoft Power Fx on GitHub

These were the questions that inspired the creation of Power Apps and Power Fx. Hundreds of millions of people create worksheets with Excel every day; let"s bring them app creation that"s easy and uses Excel concepts that they already know. By breaking Power Fx out of Power Apps, we"re going to answer these questions for building automation, or a virtual agent, or other domains.

All programming languages, including Power Fx, have expressions: a way to represent a calculation over numbers, strings, or other data types. For example, mass * acceleration in most languages expresses multiplication of mass and acceleration. The result of an expression can be placed in a variable, used as an argument to a procedure, or nested in a bigger expression.

Power Fx takes this a step further. An expression by itself says nothing about what it"s calculating. It"s up to the maker to place it in a variable or pass it to a function. In Power Fx, instead of only writing an expression that has no specific meaning, you write a formula that binds the expression to an identifier. You write force = mass * acceleration as a formula for calculating force. As mass or acceleration changes, force is automatically updated to a new value. The expression described a calculation, a formula gave that calculation a name and used it as a recipe. This is why we refer to Power Fx as a formula language.

In the Input box below the formula, the text "Hello, World! It is great to meet you!" appears, letter by letter. At the same time in the Label box, the letters of the last word appear. When the full text appears in the Input box, the word "you!" appears in the Label box.

What"s great about this is that it"s isolated from what"s happening for the Fill color: these are two entirely different calculations. Instead of large monolithic procedures, Power Fx logic is typically made up of lots of smaller formulas that are independent. This makes them easier to understand and enables enhancements without disturbing existing logic.

Power Fx is a declarative language, just as Excel is. The maker defines what behavior they want, but it"s up to the system to determine and optimize how and when to accomplish it. To make that practical, most work is done through pure functions without side effects, making Power Fx also a functional language (again, just as Excel is).

The same thing is implemented with Power Fx. An incremental compiler is used to continuously keep the program in sync with the data it"s operating on. Changes are automatically propagated through the program"s graph, affecting the results of dependent calculations, which might drive properties on controls such as color or position. The incremental compiler also provides a rich formula editing experience with IntelliSense, suggestions, autocomplete, and type checking.

In the animation below, the order number is displayed in a label control dependent on the slider control, even though there are two errors on the labels below it. The app is very much alive and interactive. The first attempt at fixing the formula by entering .InvalidName results in an immediate red line and error displayed, as it should, but the app keeps running.

Power Fx describes business logic in concise, yet powerful, formulas. Most logic can be reduced to a single line, with plenty of expressiveness and control for more complex needs. The goal is to keep to a minimum the number of concepts a maker needs to understand—ideally, no more than an Excel user would already know.

For example, to look up the first name of an employee for an order, you write the Power Fx as shown in the following animation. Beyond Excel concepts, the only added concept used here is the dot "." notation for drilling into a data structure, in this case .Employee."First Name". The animation shows the mapping between the parts of the Power Fx formula and the concepts that need to be explicitly coded in the equivalent JavaScript.

Asynchronous: All data operations in Power Fx are asynchronous. The maker doesn"t need to specify this, nor does the maker need to synchronize operations after the call is over. The maker doesn"t need to be aware of this concept at all, they don"t need to know what a promise or lambda function is.

Local and remote: Power Fx uses the same syntax and functions for data that"s local in-memory and remote in a database or service. The user need not think about this distinction. Power Fx automatically delegates what it can to the server, to process filters and sorts there more efficiently.

Projection: When writing a query, many developers write select * from table, which brings back all the columns of data. Power Fx analyzes all the columns that are used through the entire app, even across formula dependencies. Projection is automatically optimized and, again, a maker doesn"t need to know what "projection" means.

Display names and localization: First Name is used in the Power Fx formula while nwind_firstname is used in the JavaScript equivalent. In Microsoft Dataverse and SharePoint, there"s a display name for columns and tables in addition to a unique logical name. The display names are often much more user-friendly, as in this case, but they have another important quality in that they can be localized. If you have a multilingual team, each team member can see table and field names in their own language. In all use cases, Power Fx makes sure that the correct logical name is sent to the database automatically.

You don"t have to read and write Power Fx to start expressing logic. There are lots of customizations and logic that can be expressed through simple switches and UI builders. These no-code tools have been built to read and write Power Fx to ensure that there"s plenty of headroom for someone to take it further, while acknowledging that no-code tools will never offer all the expressiveness of the full language. Even when used with no-code builders, the formula bar is front and center in Power Apps to educate the maker about what"s being done on their behalf so they can begin to learn Power Fx.

Let"s take a look at some examples. In Power Apps, the property panel provides no-code switches and knobs for the properties of the controls. In practice, most property values are static. You can use the color builder to change the background color of the Gallery. Notice that the formula bar reflects this change, updating the formula to a different RGBA call. At any time, you can go to the formula bar and take this a step further—in this example, by using ColorFade to adjust the color. The color property still appears in the properties panel, but an fx icon appears on hover and you"re directed to the formula bar. This fully works in two ways: removing the ColorFade call returns the color to something the property panel can understand, and you can use it again to set a color.

Here"s a more complicated example. The gallery shows a list of employees from Dataverse. Dataverse provides views over table data. We can select one of these views and the formula is changed to use the Filter function with this view name. The two drop-down menus can be used to dial in the correct table and view without touching the formula bar. But let"s say you want to go further and add a sort. We can do that in the formula bar, and the property panel again shows an fx icon and directs modifications to the formula bar. And again, if we simplify the formula to something the property panel can read and write, it again can be used.

These have been simple examples. We believe Power Fx makes a great language for describing no-code interactions. It is concise, powerful, and easy to parse, and provides the headroom that is so often needed with "no cliffs" up to low-code.

Low-code makers sometimes build things that require the help of an expert or are taken over by a professional developer to maintain and enhance. Professionals also appreciate that low-code development can be easier, faster, and less costly than building a professional tool. Not every situation requires the full power of Visual Studio.

Professionals want to use professional tools to be most productive. Power Fx formulas can be stored in YAML source files, which are easy to edit with Visual Studio Code, Visual Studio, or any other text editor and enable Power Fx to be put under source control with GitHub, Azure DevOps, or any other source code control system.

Power Fx supports formula-based components for sharing and reuse. We announced support for parameters to component properties, enabling the creation of pure user-defined functions with more enhancements on the way.

Also, Power Fx is great at stitching together components and services built by professionals. Out-of-the-box connectors provide access to hundreds of data sources and web services, custom connectors enable Power Fx to talk to any REST web service, and code components enable Power Fx to interact with fully custom JavaScript on the screen and page.

Power Fx is designed to target the maker audience, whose members haven"t been trained as developers. Wherever possible, we use the knowledge that this audience would already know or can pick up quickly. The number of concepts required to be successful is kept to a minimum.

Being simple is also good for developers. For the developer audience, we aim to be a low-code language that cuts down the time required to build a solution.

Microsoft Power Fx language borrows heavily from the Excel formula language. We seek to take advantage of Excel knowledge and experience from the many makers who also use Excel. Types, operators, and function semantics are as close to Excel as possible.

The maker describes what they want their logic to do, not exactly how or when to do it. This allows the compiler to optimize by performing operations in parallel, deferring work until needed, and pre-fetching and reusing cached data.

Where possible, the functionality that"s added composes well with existing functionality. Powerful functions can be decomposed into smaller parts that can be more easily used independently.

Excel isn"t object-oriented, and neither is Power Fx. For example, in some languages, the length of a string is expressed as a property of the string, such as "Hello World".length in JavaScript. Excel and Power Fx instead express this in terms of a function, as Len( "Hello World" ).

Makers can create their components and functions by using Power Fx itself. Developers can create their components and functions by writing JavaScript.

Evolving programming languages is both necessary and tricky. Everyone—rightfully—is concerned that a change, no matter how well-intentioned, might break existing code and require users to learn a new pattern. Power Fx takes backward compatibility seriously, but we also strongly believe that we won"t always get it right the first time and we"ll collectively learn what"s best as a community. We must evolve, and Power Fx designed support for language evolution from the very beginning.

A language version stamp is included with every Power Fx document that"s saved. If we want to make an incompatible change, we"ll write what we call a "back compat converter" that rewrites the formula automatically the next time it"s edited. If the change is something major that we need to educate the user about, we"ll also display a message with a link to the docs. Using this facility, we can still load apps that were built with the preview versions of Power Apps from many years ago, despite all the changes that have occurred since then.

This is how the same app looks when loaded into the latest version of Power Apps. No action was required by the user to make this transformation happen, it occurred automatically when the app was opened.

New York, United States, Aug. 15, 2022 (GLOBE NEWSWIRE) -- The surface of an electronic paper display is electrically charged and duplicates the appearance of ink on paper. The electronic paper display (EPD) is used for e-books, electronic newspapers, portable signs, and folding displays. Due to their enhanced characteristics, such as readability in direct light (indoor and outdoor environments), low power consumption, lightweight, durability, and convenient construction, EPDs have significantly advanced display technology. The primary benefits of electronic paper over conventional LCD screens are its paper-like reading and low power consumption.

EPDs are also being implemented for retail and transportation uses, such as bus stops and rail information boards. In Japan, for instance, E-Ink Holdings and Papercast have developed a solar-powered electronic paper passenger information display technology for a smart bus stop project. The Jerusalem Transportation Master Plan Team (JTMT) has implemented solar-powered e-paper displays in bus stop passenger information systems. In addition, the rising demand for information on the go, the increasing number of electronic readers, and the development of easy-to-use display devices are important drivers driving the need for the electronic paper display market.

EPDs have significantly advanced display technology due to enhanced characteristics, such as readability under direct light (indoor and outdoor conditions), lower power consumption, lighter weight, greater durability, and convenient construction. The primary advantages of electronic paper over conventional LCD screens are its paper-like readability and low power consumption. Companies like E Ink Holdings Inc. remained committed to advancing EPD goods and technologies. In addition to consistently expanding EPD module technology, the business has committed itself to develop color EPD technology. As the product applications and ecosystem of e-paper technology continue to evolve, the company plays a crucial position in the total supply chain. It remains a significant vendor in terms of technology and production capacity through constant innovation and investment of resources.

In April 2022, E Ink launched E Ink Spectra 3100 Plus five-color ePaper. Spectra 3100 Plus adds bright orange to the previous generation"s four colors (black, white, red, and yellow). The combination of five vivid and saturated colors creates a more eye-catching display, which will help retailers improve their marketing and advertising performance. E Ink Spectra 3100 Plus offers a variety of display sizes, including 1.64-inch, 2.36-inch, 3-inch, 4.37-inch, 7.3-inch, and 8.14-inch, allowing retailers to choose a suitable length of five-color ePaper for different application scenarios.

An import function allows additionally to use Windows fonts. With the FontEditor it is easy to generate for example Cyrillic, Greek and Arabic fonts. The preview function shows immediately the size and style in simulation window. When the testboard EA 9780-2USB is connected to the USB port, you can see the character (or any predefined text) live on the display which is plugged-in!

This large loop powered indicator features a 3½ digit LCD with 19mm (0.75") digit height.  Calibration is by two multi-turn potentiometers and connection to the current loop is via two screw terminals.  The DPM 942 is a low cost, popular part, normally stocked in high quantity and suitable for new designs.