A power supply for a two-wire load control device supplies power to a microprocessor, which in turn controls the power supply. The power supply comprises an energy storage element, e.g., a capacitor, for producing a DC voltage for powering the microprocessor. The power supply comprises a high impedance...http://www.google.co.uk/patents/US7546473?utm_source=gb-gplus-sharePatent US7546473 - Dimmer having a microprocessor-controlled power supply
