"a circuit I got in the internet..."

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Andy Neil
03/24/12 00:44
Read: 304 times
Basingstoke
Uk

#186849 - "a circuit I got in the internet..."
Responding to: Chico Magalhães's previous message

Chico Magalhães 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

Topic Author Date
555 Timer for AC       Chico Magalhães       03/23/12 15:42
   "a circuit I got in the internet..."       Andy Neil       03/24/12 00:44
      Tests       Chico Magalhães       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 Magalhães       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 Magalhães       03/28/12 21:25
   Re       Ramesh Rai       04/18/12 21:03
      Don't hijack threads       Andy Neil       04/18/12 23:14

Back to Subject List

Topic	Author	Date
555 Timer for AC	Chico Magalhães	03/23/12 15:42
*"a circuit I got in the internet..."*	Andy Neil	03/24/12 00:44
Tests	Chico Magalhães	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 Magalhães	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 Magalhães	03/28/12 21:25
Re	Ramesh Rai	04/18/12 21:03
Don't hijack threads	Andy Neil	04/18/12 23:14