In the past I built a serial controlled relay board to control my Christmas lights with my computer. I plan on using the same board to control solenoids that bang on metal bars to make music. I have come by 30+ large solenoids that take about 20VA each to trigger correctly. My problem is this: How do I supply power to them so that I can trigger more than one at a time?
As it stands, my relay boards only work with AC power. It wouldn't be practical to have a transformer for every solenoid. Is there a way I can have one power supply and a way to have the right amount of power go to each solenoid regardless of how many are connected?
If it makes a difference, I can put together new relay boards that use DC.
Wouldn't I essentially need a beefy resistor for each solenoid to limit the current through each one?
As it stands, my relay boards only work with AC power. It wouldn't be practical to have a transformer for every solenoid. Is there a way I can have one power supply and a way to have the right amount of power go to each solenoid regardless of how many are connected?
If it makes a difference, I can put together new relay boards that use DC.
Wouldn't I essentially need a beefy resistor for each solenoid to limit the current through each one?