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  • Scanning for Ideas: A Motor Pump Built for Solar Power
    Edited by Stephen J. Mraz , Chula Vista, Calif. ( ), anticipating a sharp spike in interest in solar-powered systems, have designed the Ecocirc DC pump, a circulation pump that can be connected directly to photovoltaic cells. The design is based on a spherical motor, a concept invented by Laing
  • Medical Device Link .
    is transformed into magnetism, which is then used to produce the rotating movement of a drive shaft (AC or DC motors) or the oscillating movement of a vibrating armature. Shaft and armature are connected to a diaphragm in the pump head where the desired flow and pressure is produced. Table I shows
  • Connecting LEDs: Serial vs. Parallel
    converter to create voltages higher and lower than the battery, depending on the state of charge. Connecting all LEDs in series requires a boost converter to create a voltage higher than the power source. In practice, series connected LEDs are powered from DC/DC inductive boost converters, whereas

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