i have what i think might be a simple question for you guys.
if i wanted to build a device that takes electricity from a uk mains power supply and change its power and rate of alternation with the ability to respond to led sensors what would i need to do.
what it is im needing is for a flow to an electromagnet to change direction constantly from this device.
I think you need a 240 Vac to XXX Vdc power supply. Use an H-Bridge, similar to what would be used to change direction of a DC motor, to drive the electromagnet. The H-Bridge will allow you to control the magnitude and the direction of the current through the electromagnet. XXX depends on the resistance, inductance, and how fast you need to establish the current in the coil.
dose that mean id need 3 separate psu's? and im not sure if il be needing them to pulse individually at the moment as im still in experimenting states.
You have been talking about three electromagnets. What is the Inductance & Resistance of the electromagnet coil? How much current through the coil does it take to produce the magnetic attraction you need?
What are you trying to do with the coil(S)? The fact that you want to reverse the current through the coils suggests that you want it to interact with a permanent magnet?
im just experimenting so i have no specifics when it comes to strength and size atm, the item that is going to be pulled and pushed with the electromagnets hopefully will be a ball of tiny magnets all with the same polarity.