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Another question on parts...

Former Member

I have just ordered an LED strip which runs off 12v and this will be the first time I will be running loads over thw 5v max of the Arduino.

 

I have 3 questions which I an sure are simple enough for someone who isnt just starting (as I am). :-)

 

Question 1

 

I have found this blog post...

 

http://genericnerd.blogspot.com/2009/05/arduino-mood-light-controller.html

 

and this thread...

 

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1236091181

 

which both talk about a ULN2003.

 

However if I do a serch on the store for a ULN2003 I get a lot of different results and I am not sure which one to get.  (See the link below...)

 

http://uk.farnell.com/jsp/search/browse.jsp?N=0+5116518&Ntk=gensearch_001&Ntt=ULN2003&Ntx=mode+matchallpartial&suggestions=false&ref=globalsearch&_requestid=52633&No=0&getResults=true&appliedparametrics=true&locale=en_UK&catalogId=&prevNValues=0+5116518+5677403&filtersHidden=false&appliedHidden=false&originalQueryURL=%2Fjsp%2Fsearch%2Fbrowse.jsp%3FN%3D0%26Ntk%3Dgensearch_001%26Ntt%3DULN2003%26Ntx%3Dmode%2Bmatchallpartial%26suggestions%3Dfalse%26ref%3Dglobalsearch%26_requestid%3D52633%26No%3D0%26getResults%3Dtrue%26appliedparametrics%3Dtrue%26locale%3Den_UK%26catalogId%3D%26prevNValues%3D0

 

Question 2

 

Do the letters at the end of the chip name mean anything inperticular?  (eg ULN2003A or ULN2003ADE4)

 

Question 3

 

Whats the best way to get a 12v source from the mains power supply?

 

Somthing like this?

 

http://www.amazon.co.uk/Universal-MAINS-POWER-ADAPTOR-300MA/dp/B003BEZ7HI/ref=sr_1_1?ie=UTF8&qid=1303026736&sr=8-1

 

Thanks everyone...

Parents

  • All your questions are answered in the data sheet that I posted the link of in my previous post, you just need to spend some time looking through it.

    The sheet covers many devices that are similar as well as the device you asked about, some with higher currents and some lower, these are also detailed in the data sheet.

    Practicing reading data sheets is part of our hobby and very necessary.

    Best wishes.

    Andy M.

Reply

  • All your questions are answered in the data sheet that I posted the link of in my previous post, you just need to spend some time looking through it.

    The sheet covers many devices that are similar as well as the device you asked about, some with higher currents and some lower, these are also detailed in the data sheet.

    Practicing reading data sheets is part of our hobby and very necessary.

    Best wishes.

    Andy M.

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