countdown.. but how?

it is possible to create a countdown to a specific time, so how do you do that? not to be confused with the countdown of the set time in standard timer. I put 28 minutes and it will count down from there. I will therefore that it must rely more time remaining to a specifick heel impact. for example, at 4:23 then starts a television program that I would like to know the exact time that is left until then. are you with me on this problem?

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It does not look like you have used the forums yet, as a search using the search box above would have returned several threads about this topic.

See for example https://groups.google.com/forum/#!searchin/mitappinventortest/countdown%7Csort:relevance

Taifun

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i´m so sorry...

have read this thread ... the problem is how I can put time as the target for the countdown. user to select / enter the time when the timer is the goal.

i can´t find similar project..

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use the time picker component http://ai2.appinventor.mit.edu/reference/components/userinterface.html#TimePicker

A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook   http://www.appinventor.org/book2 ... the links are at the bottom of the Web page.  The book 'teaches' users how to program with AI2 blocks.

There is a free programming course here http://www.appinventor.org/content/CourseInABox/Intro  and the aia files for the projects in the book are here:  http://www.appinventor.org/bookFiles  

How to do a lot of basic things with App Inventor are described here:  http://www.appinventor.org/content/howDoYou/eventHandling.

Also do the tutorials http://appinventor.mit.edu/explore/ai2/tutorials.html to learn the basics of App Inventor, then try something and follow the

 Top 5 Tips: How to learn App Inventor

You will not find a tutorial, which does exactly what you are looking for. But doing the tutorials (not only reading a little bit) help you to understand, how things are working. This is important and this is the first step to do.

Taifun    

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thx

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