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Andy Neil
03/24/12 00:44
Read: 745 times
Basingstoke
Uk


 
#186849 - "a circuit I got in the internet..."
Responding to: Chico Magalh„es's previous message
Chico Magalh„es said:
I have adapted a circuit I got in the internet..."

Before you "adapted" it, did you spend time studying the original to ensire that you fully understood how it works?

As has been said to you before, you really need to make sure that you understand stuff that you find on the internet before trying to modify/apply it...

The 555 is a very widely used, and very well established component - there is a vast amount of information available about it in books, magazine articles and, of course, the interweb.

eg, http://www.kpsec.freeuk.com/555timer.htm

built it but it is not working as I expected

So the first thing to do is to verify your expectation!

Then debug the circuit!

What basic testing and debugging have you done yourself?

Here's some tips to get you started:

http://www.8052.com/faqs/120313

http://www.eetimes.com/discussio...geNumber=0


What have you found?

eg, does just the 555 part work alone?

the motor never turns off, can someone give a help?

Remember that thyristors are not necessarily good with inductive loads - like motors...

List of 26 messages in thread
TopicAuthorDate
555 Timer for AC      Chico Magalh„es      03/23/12 15:42      
   "a circuit I got in the internet..."      Andy Neil      03/24/12 00:44      
      Tests      Chico Magalh„es      03/24/12 01:25      
         Then leave AC mains well alone!!        Andy Neil      03/24/12 05:11      
         then why did you put it together        Erik Malund      03/26/12 06:57      
            a recipe for disaster        Andy Neil      03/26/12 12:38      
               How safe is safe?      Justin Fontes      03/26/12 13:51      
                  HUMANLY safe      Erik Malund      03/26/12 13:57      
                     I would also add      Justin Fontes      03/26/12 14:21      
                        A good link to electrical safety      Justin Fontes      03/26/12 20:28      
   You dally with danger again!        Kai Klaas      03/24/12 06:58      
   the value of a human life ....      Erik Malund      03/26/12 13:02      
      An unsafe bodge for a basically unsuitable design!      Andy Neil      03/26/12 13:24      
   So this circuit cant work?...      Chico Magalh„es      03/26/12 22:03      
      How much do you understand?      David Prentice      03/27/12 01:07      
      How do you know you know enough?      Per Westermark      03/27/12 01:16      
      already answered      Erik Malund      03/27/12 06:09      
      Capacitor power supplies...        Kai Klaas      03/27/12 17:03      
         the bane of the high voltage amateur      Erik Malund      03/28/12 07:03      
            Just 24V isn't enough      Per Westermark      03/28/12 07:53      
      You are contradicting yourself!      Andy Neil      03/28/12 14:11      
   RE: 555 Timer for AC        Hans Van Pelt      03/27/12 02:48      
      Triacs      Andy Neil      03/28/12 14:08      
   I'm giving up        Chico Magalh„es      03/28/12 21:25      
   Re      Ramesh Rai      04/18/12 21:03      
      Don't hijack threads      Andy Neil      04/18/12 23:14      

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