By using our services, you agree to our Privacy Policy. Click to accept.

Acquiring Analog Input with the Universal Library

Learn more at:

Today we're going to show you how easy it is to write a program that acquires analog input voltage data using the Universal Library and Visual Basic.

Connect a measurement computing DAQ device to your computer and run InstaCal. After you have detected your device with InstaCal, run Microsoft Visual Basic and create a new Windows Form application. I'm using Visual Basic 2010 Express, but you could also use another development environment from Microsoft Visual Studio .NET.

The application access the Universal Library through the MCCDAQ assembly, so you must add a reference to this file in your project.

Right-click on "WindowsApplication1" within the Solution Explorer, and select "Add Reference". Click the Browse tab, navigate to the root directory where the Universal library is installed, and select "mccdaq.dll".

Use the Toolbox to add controls to the Form. I'm adding a button control, two label controls, and a timer control.
• The button control will be used to start the acquisition.
• The first label control simply provides a description; the second label control will display voltage values read from the DAQ device.

You can change the Text property of a control to identify what displays on the form:
• I'm changing the Text property of the Button control to "Start"
• the first label control to "Channel value:"
• the second label control to ..."Display value"
• I'm also changing the text property of the Form to read "Universal Library AIn()".

After setting up the form, double-click on the button control and add some code.

1. Beneath the Public Class Form1 line, enter code that declares the variables and instantiates a board from the MCCBoard class. The MccBoard class is used to access DAQ methods and board properties.

a. I named the first variable "mydaqboard" -- this variable creates a new instance of the MccBoard class. The 0 indicates that the board is installed as board 0 in InstaCal.

b. I named the second variable "datival" -- this variable will hold the integer count value read from the DAQ device, so I set the datatype to be a 16-bit integer.

c. I named the third variable "engunit" -- this variable will hold the voltage value that is converted from the count value, so I set the data type to "Single".

2. Now add a click event that calls the timer function when the button is clicked. The timer control is identified as timer1, so enter timer1.start()

3. Now create a timer tick event which calls the universal library AIn() method.

a. AIn() reads an A/D input channel and returns a 16-bit integer value.
Enter 0 as the channel number to read, select the range, and select dataval to hold value the read from the board.

b. Now call the UL method ToEngUnit() to convert the data from a 16-bit value to volts, and to store the value in the variable engunit.

Share on FacebookShare on TwitterShare on PinterestShare on RedditShare on TumblrShare on VkontakteShare on LinkedinShare on BloggerShare on Telegram
Copy URL

Random YouTube Videos Generator

 This site provides links to random videos hosted at YouTube, with the emphasis on random.

 The original idea for this site actually stemmed from another idea to provide a way of benchmarking the popularity of a video against the general population of YouTube videos. There are probably sites that do this by now, but there wasn’t when we started out. Anyway, in order to figure out how popular any one video is, you need a pretty large sample of videos to rank it against. The challenge is that the sample needs to be very random in order to properly rank a video and YouTube doesn’t appear to provide a way to obtain large numbers of random video IDs.

Alternative random YouTube videos generator: vTomb

 Even if you search on YouTube for a random string, the set of results that will be returned will still be based on popularity, so if you’re using this approach to build up your sample, you’re already in trouble. It turns out there is a multitude of ways in which the YouTube search function makes it very difficult to retrieve truly random results.

 So how can we provide truly random links to YouTube videos? It turns out that the YouTube programming interface (API) provides additional functions that allow the discovery of videos which, with the right approach, are much more random. Using a number of tricks, combined some subtle manipulation of the space-time fabric, we have managed to create a process that yields something very close to 100% random links to YouTube videos.

 YouTube is an American video-sharing website headquartered in San Bruno, California. YouTube allows users to upload, view, rate, share, add to playlists, report, comment on videos, and subscribe to other users. It offers a wide variety of user-generated and corporate media videos. Available content includes video clips, TV show clips, music videos, short and documentary films, audio recordings, movie trailers, live streams, and other content such as video blogging, short original videos, and educational videos. Most content on YouTube is uploaded by individuals, but media corporations including CBS, the BBC, Vevo, and Hulu offer some of their material via YouTube as part of the YouTube partnership program. Unregistered users can only watch videos on the site, while registered users are permitted to upload an unlimited number of videos and add comments to videos. Videos deemed potentially inappropriate are available only to registered users affirming themselves to be at least 18 years old.

 YouTube and selected creators earn advertising revenue from Google AdSense, a program which targets ads according to site content and audience. The vast majority of its videos are free to view, but there are exceptions, including subscription-based premium channels, film rentals, as well as YouTube Music and YouTube Premium, subscription services respectively offering premium and ad-free music streaming, and ad-free access to all content, including exclusive content commissioned from notable personalities. As of February 2017, there were more than 400 hours of content uploaded to YouTube each minute, and one billion hours of content being watched on YouTube every day. As of August 2018, the website is ranked as the second-most popular site in the world, according to Alexa Internet, just behind Google. As of May 2019, more than 500 hours of video content are uploaded to YouTube every minute.

 YouTube has faced criticism over aspects of its operations, including its handling of copyrighted content contained within uploaded videos, its recommendation algorithms perpetuating videos that promote conspiracy theories and falsehoods, hosting videos ostensibly targeting children but containing violent and/or sexually suggestive content involving popular characters, videos of minors attracting pedophilic activities in their comment sections, and fluctuating policies on the types of content that is eligible to be monetized with advertising.

By using our services, you agree to our Privacy Policy.
Powered by Wildsbet.

YoutuBeRandom © 2022