LED 555 Timer Question

Reply to Thread

Discussion in 'The Projects Forum' started by jwspark572, Apr 6, 2009.

Reply to Thread
  1. Apr 6, 2009 #1
    jwspark572

    Thread Starter New Member

    Apr 6, 2009
    3
    0
    I have an LED 555 timer project that I would like to change. I got the design from the internet; which I hand drawn to paper. The circuit right now uses 6vDC; which I have built and works. I would like to run it from a 12vDC battery source. What changes would I need to make? How many LED's can I run in series/parallel?
    please see attachment
    Thanks for any help!
     
    #1 Reply
  2. Apr 6, 2009 #2
    Bernard

    Expert

    Aug 7, 2008
    5,021
    567
    At 12V , 555 @ 20 ma , output .2V & 10.75V [ measured], blue 3 LEDs with 110Ω, red , 5 LEDs with 62Ω, or maybe better, 4 LEDs with 160Ω. Using max current from 555 @ 200 mA, could use 10 strings, might cut back a string or two for longevity. All figures subject to review.
     
    #2 Reply
  3. Apr 7, 2009 #3
    Wendy

    Moderator

    Mar 24, 2008
    21,503
    2,962
    #3 Reply
  4. Apr 7, 2009 #4
    jwspark572

    Thread Starter New Member

    Apr 6, 2009
    3
    0
    Thank You Mr. Marsden for the link. The articles are a big Help.

    Joe
     
    #4 Reply
Loading...
Related Forum Posts:
  1. FishFried

    Question about similar 555 timer circuit- LED Flasher and Fader

    Posted by FishFried in forum: Digital Circuit Design
    Replies:
    5
    Views:
    353
  2. Roger13

    Led Controller 555 timer

    Posted by Roger13 in forum: General Electronics Chat
    Replies:
    21
    Views:
    688
  3. Hidden

    555 timer blinking LED

    Posted by Hidden in forum: The Projects Forum
    Replies:
    6
    Views:
    406
  4. ryfitzger227

    One Flash LED 555 Timer question

    Posted by ryfitzger227 in forum: The Projects Forum
    Replies:
    10
    Views:
    3,853
  5. ttp

    555 Timer Question

    Posted by ttp in forum: The Projects Forum
    Replies:
    6
    Views:
    1,950
You May Also Like:

  1. Design a Custom Microcontroller Programming and Testing Board

  2. The Why and How of Differential Signaling

  3. The New Wireless Thread Network Protocol


Load More Articles