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Assembled electromagnet devices. The air core coil in (a) is shown over top a 35 mm culture dish; (b) shows the stacked three-coil system, where each coil is connected in series; (c) pot core design shown with the unshielded, open side up; (d) ferromagnetic core coil; (e) The stimulation controller is pictured connected to a laptop with USB, the power supply which delivers the DC stimulation current, and the pot core coil.
