Report a comment

Thank you for taking the time to report the following comment to the administrator of this site.
Please complete this short form and click the submit button to process your report.

Name
  
E-mail
  
Reason for reporting comment
  
 
 

Comment in question
Posted by kwesoly.net, on Jul-2009,
1. Using PNP/NPN transistors
Nice tutorial, but i'm afraid I found real mistake. On figure you've used NPN transistor. It needs about 0.6-0.7 V voltage between emitter and gate. Therefore if gate voltage would be equal/lower than VCC (and probably it will) you'll get extra voltage drop on transisor, making it will work in active part of characteristics and therefore it would be hot. Better idea is to use a PNP transistor, like in this doc: 
http://www.picbasic.com/ resources/articles/ledart.htm
 
» Report this comment to administrator
» Reply to this comment...

»  Go back to the article


mXcomment 1.0.5 © 2007-2010 - visualclinic.fr
License Creative Commons - Some rights reserved
Home arrow Tutorial