555 timer,relay with dc motor(12V)

Discussion in 'General Electronics Chat' started by vigneshsan, Aug 5, 2012.

  1. vigneshsan

    Thread Starter New Member

    Aug 5, 2012
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    I wanted to make a dc motor run for a fixed duration . So I employed a 555 timer in monostable mode and fed the pin 3 output to a relay com terminal and then i connected the motor to the relay .Its a 12v relay and a 12v dc motor.The 555 is perfectly working in monostable mode but the problem is i can't drive the motor on coupling the circuit with the motor by means of the relay.....so i need a solution for this.... secondly can i directly feed the pin3 output to the dc by suitably amplifying the output , sufficient to drive the motor
     
  2. #12

    Expert

    Nov 30, 2010
    16,261
    6,770
    You're having trouble connecting the motor to the relay terminals?
    A drawing of your circuit would be a lot of help. Can you post a drawing?
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,170
    395
    Partial schematic of 555 driving a relay is shown so that we can compare notes. Without D1, D2, 555 will most likley mis fire, resetting on trigger & possible damage to 555.
     
  4. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,170
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    Pushed wrong button.
     
  5. vigneshsan

    Thread Starter New Member

    Aug 5, 2012
    2
    0
    thank you for your suggestion . i will try out with this and check .....And the following attachment shows the way i connected the circuit
     
    Last edited: Aug 6, 2012
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