cnn current

LDO current regulator for power LEDChallengeYou ' ve got a power LED? great! Build a flash light!What does the spec say? "voltage:3.6. 3.8 V, Power 3 W. " Okay. This means it draws some. Three Mignon cells give 4.5 V for at least three hours. So we add a resistor of 1.2 ohms and we are safe. If the LED runs at 3.6 v this gives MA and 2.8 W while the resistor voltage are 0.9 v resulting in 0.675 W for the Resi Stor. So we take a resistor that can stand

First, PHP gets the URL of the current page: Copy the Code code as follows: Get the current script URLfunction Getcururl (){if (!empty ($_server["Request_uri")){$scriptName = $_server["Request_uri"];$nowurl = $scriptName;}Else{$scriptName = $_server["Php_self"];if (Empty ($_server["query_string"])){$nowurl = $scriptName;}Else{$nowurl = $scriptName. "?". $_server["Query_string"];}}return $nowurl;} The other

Getting the current array value in the php array Getting Started Tutorial This article describes how to obtain the current array value of a php array. For more information, see.In the php array operation, you can use the current () function to return the array value of the current pointer position in the array

Gets the current UNIX timestampThe UNIX timestamp (called: timestamp) is a very important concept in PHP for time and date, which represents the sum of the seconds from January 1, 1970 00:00:00 to the current time.PHP provides a built-in function time () to get the timestamp of the current time of the server. It is easy to get the

Selectsubdate (Curdate (), Date_format (Curdate (), '%w ')-1)//Get current date in the Monday of the weekSelectsubdate (Curdate (), Date_format (Curdate (), '%w ')-7)//Get current date on Sunday of the weekThese two sentences are a method that MySQL uses to fetch the current date of Monday or Sunday, then how does this sentence work?%w is a number representing th

VarmyDatenewDate (); myDategetYear (); get the current year (2 digits) myDategetFullYear (); get the complete year (4 digits, 1970 -????) MyDategetMonth (); get the current month (0-11, Var myDate = new Date (); myDate. getYear (); // obtain the current year (2 digits) myDate. getFullYear (); // obtain the complete year (4 digits, 1970 -????) MyDate. getMonth ()

Js get current date time and other actionsvar mydate = new Date ();Mydate.getyear (); Get Current year (2-bit)Mydate.getfullyear (); Get the full year (4-bit, 1970-????)Mydate.getmonth (); Get the current month (0-11, 0 for January)Mydate.getdate (); Get current day (1-31)Mydate.getday (); Get

For example, I need to obtain the current URL $ url_this. $ _ SERVER [HTTP_HOST]. $ _ SERVER [PHP_SELF]; echo $ url_this;: localhostlu. php SERVER variable: $ _ SERVER Note: Used in PHP4.1.0 and later versions. In earlier versions, $ HTTP_SERVER_VARS is used. For example, I need to obtain the current URL $ url_this = http ://. $ _ SERVER ['HTTP _ host']. $ _ SERVER ['php _ SELF ']; echo $ url_this;: http: /

Cause: When writing code, it is often used to get the current timestamp and date, as summarized belowpublic void TestDate () {SimpleDateFormat df = new SimpleDateFormat ("Yyyy-mm-dd");//Set Date formatDate date = new Date ();String datestring = date.tostring ();Long times = Date.gettime ();System.out.println ("date.tostring ():" +date.tostring ());System.out.println ("current timestamp (milliseconds):" + ti

This article mainly introduces how JS obtains the current date and time and performs timed refresh. The sample code is as follows. Do not miss it if you need it. JS get current date and time Var date = new Date (); date. getYear (); // obtain the current year (2 digits) date. getFullYear (); // obtain the complete year (4 bits, 2014) date. getMonth (); // obtai

In PHP, the time () function is used to obtain the current UNIX Timestamp. the returned value is from the timestamp epoch (00:00:00 GMT, January 1, January 1, 1970) to the current number of seconds. We have learned the mktime () function before and know that the mktime () function returns the UNIX timestamp based on the given parameters. If the mktime () function does not specify a parameter, the

PHP obtains the complete URL of the current page through the pre-defined variable $ _ SERVER. $ _ SERVER is an array containing header information, path, and file location, which is created by the web SERVER, if you use the command line to run PHP, then $ _ SERVER is completely PHP obtains the complete URL of the current page through the pre-defined variable $ _ SERVER. $ _ SERVER is an array containing hea

JS Gets the current date timevar date = new Date ();d ate.getyear (); Gets the current year (2-bit) date.getfullyear (); Get the full year (4-bit) date.getmonth (); Get the current month (0-11, 0 for January) date.getdate (); Get current day (1-31) date.getday (); Get