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

Thread Starter

daligotee1225

Joined Dec 29, 2010
4
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!

 

KJ6EAD

Joined Apr 30, 2011
1,573
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?
 

Thread Starter

daligotee1225

Joined Dec 29, 2010
4
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.
 

crutschow

Joined Mar 14, 2008
26,974
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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