I am working on a espresso machine project where I want to control a Ulka vibratory pump using 5V. Once I get this working I plan to use an Arduino to turn the pump on and off.
My current understanding of these pumps is that they have a internal diode blocking half of the AC power, thereby throwing the solenoid with each positive pulse. Since they are solenoid based, I have reasoned that they are inductive loads.
I found a few threads here about the Ulka pump, but no-one was trying to just switch it on and off
So far I have tried:
I have been reading up on SCR's and Triacs and think that maybe I need to using a SCR, but I'm still a bit confused.
Can anyone point me in the right direction?
My current understanding of these pumps is that they have a internal diode blocking half of the AC power, thereby throwing the solenoid with each positive pulse. Since they are solenoid based, I have reasoned that they are inductive loads.
I found a few threads here about the Ulka pump, but no-one was trying to just switch it on and off
So far I have tried:
- Using a zero-crossing SSR to switch the hot wire to the pump that it works as expected, however when in the off state the pump hums.
- Using a random fire SSR to switch the hot wire. According to what I have read, these should be the SSR to use. However, it did not work and thepump just hummed like before.
- Using a electromechanical relay to switch the hot wire. The relay didn't work and the pump hummed as before.
I have been reading up on SCR's and Triacs and think that maybe I need to using a SCR, but I'm still a bit confused.
Can anyone point me in the right direction?