Hello guys. I am new member of this forum and I am looking for some guidance on a certain project. Now, the reason I am posting is that I need your help with a project I am currently just starting and of which unfortunately I have little details figured out as well, so please bear with me if you will and I will try to provide as many information as best as I can on request. So here we go: I am looking to design and create a source of magnetic field of which I want to be able to control its strength, hence I suppose I am looking for an electromagnet. Its intended use will be to be able to make flexible rods (material of rods yet undicided) to bend towards it. Now these rods are expected to be a few inches thick (lets say between 1.5" to 3" thick), one end made immobile on the ground and I would guess a length of say close to one (1) meter or so. What I would also like would be to be able to affect, using a single electromagnetic setup, more than one such rods, the closest of which would be, say, 3 meters away from the electromagnet and the farthest about, let's say 8-10 meters away. Regarding the power, I am already guessing I will be needing some shorts of heavy duty power generator (contrary to the typical capacitor relays used in DIY home experimental projects). With regards to temperature, let's just suppose I may be able to choose from the absolute minimum options out there (yet unknown/undecided but I'd say water(?)) So, bearing in mind that I have only a vague idea of this project (note: it is not in nature an industrial or of great precision project), could you guys provide me with your thoughts and a few directions for me to consider and explore?