timing circuit

Discussion in 'General Electronics Chat' started by harsha a s, Jan 30, 2012.

  1. harsha a s

    Thread Starter New Member

    Jan 23, 2012
    11
    0
    I need timing delay of 10sec.... so can i achive this by using 555 ic ??? else is there any circuit configuration by using electronic component.
    :)
     
  2. holnis

    Member

    Nov 25, 2011
    50
    4
    555 timer is a good solution, therefore this small 8-pin device affords a lot of features.

    There are the pins 4 and 8 which should be powered. When you use pins, you count from the bottom left, which is indicated by the small indented circle in the chip. Pin 1 should be connected to the negative end of the battery or power supply. The chip can run from 2 volts to up to 14 (some chips support 18) volts but for something like an LED, 9 volts should be good (a different voltage would mean you'd need a different resistor for the LED). Pin 5, optionally, should be connected through a small capacitor (100nF or near) to the negative end of the battery; the capacitor should not be electrolytic. This is optional as it just helps settle the value on one of the internal comparators and makes the timing more accurate.

     
  3. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
  4. harsha a s

    Thread Starter New Member

    Jan 23, 2012
    11
    0
    why is that led??? is it necessary?? i need to switch off motor after 10sec once its start.. so can you guied me pls??
     
  5. harsha a s

    Thread Starter New Member

    Jan 23, 2012
    11
    0
    sir, can i switch of motor after 10sec by using 555 timer ic??? can you help me out about connections???
     
  6. praondevou

    AAC Fanatic!

    Jul 9, 2011
    2,936
    488
    Provide the following details:

    - motor current, motor voltage, motor model#

    - how is the motor started (switch, button, remote control etc)
     
  7. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    That is a tutorial circuit. It is meant to teach you how a 555 works, and the LEDs are there to provide a visual indicator of what is happening. You are supposed to be able to figure out how to make it work for your application, people are not going to draw your project up for you with as little information as you gave.
     
  8. Wendy

    Moderator

    Mar 24, 2008
    20,764
    2,534
    A thread belongs to the OP (original poster). Trying to take over someone elses thread is called hijacking, which is not allowed at All About Circuits. I have therefore moved your thread to one you had already started on the topic.

    This was split from http://forum.allaboutcircuits.com/showthread.php?t=65393
     
  9. harsha a s

    Thread Starter New Member

    Jan 23, 2012
    11
    0
    sir there is a ic lm2907 which is used to convert frequency to voltage...
    so now my intention is to make this ic go off aft 10sec... so i need to built a timing circuit using passive electronic component.. so can you help me???
     
  10. harsha a s

    Thread Starter New Member

    Jan 23, 2012
    11
    0
    current- 300amps
    voltage- 12v
    dc series motor
    switch
     
  11. harsha a s

    Thread Starter New Member

    Jan 23, 2012
    11
    0
    i need an each pin function of ic lm2907.(f-v).. actu it's not been provided in datasheet so from where can i get..??? for 14 pin ic
     
Loading...