All About Circuits Forum  

Go Back   All About Circuits Forum > Electronics Forums > General Electronics Chat

Notices

General Electronics Chat Discussion forum for general chat about anything electronics related, including asking questions about material in the All About Circuits E-book, Worksheets, and Videos.

Reply   Post New Thread
 
Thread Tools Display Modes
  #1  
Old 07-02-2011, 08:44 AM
endaya_walatch endaya_walatch is offline
Junior Member
 
Join Date: Sep 2009
Posts: 33
Send a message via Yahoo to endaya_walatch
Default 220V to 5V

Hi to all,

Can anyone help me to find out the values of the resistor and capacitor as shown on the first page of the attachment.
This will be use to convert 220V AC to 5V DC.
Your response is highly appreciated.

Thank you very much.

Regards,
Gilbert
Attached Files
File Type: pdf schematic diagram.pdf (1,002.1 KB, 206 views)
Reply With Quote
  #2  
Old 07-02-2011, 11:09 AM
ErnieM's Avatar
ErnieM ErnieM is offline
Senior Member
 
Join Date: Apr 2011
Location: Lon Guyland, Noo Yawk
Posts: 5,210
Default

Nope, we can't help. First without any values the circuit drawn will blow something up, what specifically blows up depends on the values.

Draw the circuit properly so we get a better feeling you will build it correctly.

Then also tell us what you are driving because the cap value depends on the load current.
Reply With Quote
  #3  
Old 07-03-2011, 02:28 AM
SgtWookie's Avatar
SgtWookie SgtWookie is offline
Expert Member
 
Join Date: Jul 2007
Location: In the vast midwest of the USA; CST
Posts: 22,032
Default

Well, if we're going to be critical, let's please do so constructively so that learning occurs.

I extracted the schematic from the .pdf file:



You have a power switch, then a transformer; both good. I would like to see a fuse between the 220v supply and the power switch; that is a safety device to protect you and your project. A 1A fuse rated for at least 220v is sufficient for most hobby-type power supplies.

I'm afraid that you did not connect the full wave bridge correctly.

You have a resistor in there as a load, but you have no form of regulation.

Have a look at the 2nd attachment for a basic 5v regulated supply; not fancy but it will work for low-power loads.
Attached Images
File Type: png Endaya_supply.png (77.4 KB, 85 views)
File Type: png Basic 5v supply.png (11.0 KB, 77 views)
__________________
General info:
If you have a question, please start a thread/topic. I do not provide gratis assistance via PM nor E-mail, as that would violate the intent of this Board, which is sharing knowledge ... and deprives you of other knowledgeable input.
Reply With Quote
Reply   Post New Thread

Tags


Related Site Pages
Section Title
Worksheet Negative feedback opamp circuits
Worksheet Regulated power sources
Worksheet Zener diodes
Textbook Power supply circuits -- INCOMPLETE : Practical Analog Semiconductor Circuits
Worksheet Performance-based assessments for basic electricity competencies
Worksheet Overcurrent protection
Video Lecture Electronic Components A - Basic Components and Technical Notation
Textbook Current mirror : Discrete Semiconductor Circuits
Textbook Transformer -- power supply : Ac Circuits
Textbook Fuses : Physics Of Conductors And Insulators


Similar Threads
Thread Thread Starter Forum Replies Last Post
220v Single Phase mike K General Electronics Chat 2 06-18-2011 09:18 PM
Converting 110V CTE 50Hz generator to 220V prospro The Projects Forum 2 06-18-2010 12:13 AM
switching 220V AC with a relay xcross General Electronics Chat 2 01-29-2010 04:32 PM
220V AC motor Controller using PWM Rolandchok The Projects Forum 9 01-11-2009 11:51 AM
resistor used to convert 220V DC to 12V DC ruleworld General Electronics Chat 8 10-13-2006 09:12 AM

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 09:49 AM.


User-posted content, unless source quoted, is licensed under a Creative Commons Public Domain License.
Powered by vBulletin
Copyright ©2000 - 2014, vBulletin Solutions, Inc.