An embedded coil, 12 layer spiral as shown, can be used to move a magnet which could be used to create a very small solid state pump (for air or liquid) or valve system arrays. Using standard printed circuit board (PCB) more than 1,000 of such devices can be printed on a single panel. These coils shown are 15 mm x 15 mm.

Operating at 1/3 Hz to 3,300 Hz using an H-Bridge driver and an Arduino Uno operating at 12 Volts. This demonstrated the ability to operate in water and shows that the water cools the device enough to operate at high speed and high force.