Electronic Timer Circuit for motor

Discussion in 'The Projects Forum' started by real_eng, Apr 19, 2009.

  1. real_eng

    Thread Starter New Member

    Apr 19, 2009
    4
    0
    Gurus,
    May be this is too simple for you guys but i being from different branch dono much abt electronics.
    I am trying to built a circuit which will work as timer which will stop my motor(this motor is like water pump motor) after say 1 hr.
    so the I see circuit between AC Current and the Motor which will cut the AC supply to motor after particular time.
    AC current -- Circuit---Motor.

    Can someone pls help me in this.

    Thanks in Advance
    Real
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    I think this is an application for a relay. You would use the relay to apply and remove the voltage to the pump motor. You can then use a low voltage timer circuit to control the relay.

    hgmjr
     
  3. real_eng

    Thread Starter New Member

    Apr 19, 2009
    4
    0
    Thx for the response..
    Can you pls elaborate more on this..
    which IC to use etc.. If there is any link which can explain me

    Thx again
     
  4. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    A circuit along the lines of this one would be one way to go.

    hgmjr
     
  5. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,574
    230
    What starts the motor?

    Ken
     
  6. riobox

    New Member

    Feb 18, 2008
    1
    0
    thanks
    thanks
     
  7. real_eng

    Thread Starter New Member

    Apr 19, 2009
    4
    0
    Direct Supply AC Current starts the motor
     
  8. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,574
    230
    How much current does the pump draw? How much variability around 1 hour do you want?

    Ken
     
  9. real_eng

    Thread Starter New Member

    Apr 19, 2009
    4
    0
    Doono how much it draws.. Its the standard 230V AC Im supplying, I need to off the motor after 1 hr..
    Is there any way to find how much current it takes.

    Thanks so much for ur help
     
  10. KMoffett

    AAC Fanatic!

    Dec 19, 2007
    2,574
    230
    Most motors/pumps, on the label, list the voltage, and amps and/or watts and/or HP.

    Ken
     
  11. tkng211

    Well-Known Member

    Jan 4, 2008
    65
    2
    If you are new to the electronic or electrical DIY, suggest you to buy those cheap Timer switching Plugs from the stores ( you can choose either digital type or mechanical type).
    If you wanna try to build it yourself, be careful about electric shock or blowing up due to careless mistakes when testing.
     
  12. Chris15

    Active Member

    Apr 15, 2009
    252
    0
    Hi
    Could some 1 send me a schematic of a low volt (9V) Timer usin 1 555 timer

    Thanks Chris
     
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