How do I increase the load (24V/3A) for Velleman MK111 interval timer??

Discussion in 'The Projects Forum' started by daligotee1225, Apr 17, 2012.

  1. daligotee1225

    Thread Starter New Member

    Dec 29, 2010
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    I have built the Velleman MK111 interval timer. The current max load the timer can switch is 24V/3A. I would like to increase this value to 15A. I have found this diagram. I am very much a beginner so would appreciate a little walkthrough.

    Thanks!

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  2. KJ6EAD

    Senior Member

    Apr 30, 2011
    1,425
    363
    First, you need to choose a relay to control the load. You said it had to be rated for at least 15A, but what kind of load (inductive, resistive, etc.) and what voltage, AC or DC?
     
  3. daligotee1225

    Thread Starter New Member

    Dec 29, 2010
    4
    0
    I am using the timer to switch a garden pump on/off. The pump I am using is a submersible pump and I'm guessing its inductive. It is AC voltage.
     
  4. #12

    Expert

    Nov 30, 2010
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  5. crutschow

    Expert

    Mar 14, 2008
    12,972
    3,219
    If the motor is switched on and off frequently you should consider a solid-state relay. They are somewhat more expensive but should last indefinitely.
     
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