Patent ID: 7482712
Filing Date: 2009-01-27
Classification: F21L,F21V,F21Y,H01H,H05B,Y02B

Abstract:
1. A power supply for supplying DC power to an electronic circuit comprising at least one microcontroller, the supply comprising: a battery comprising a positive terminal and a negative terminal; a battery receiving compartment; and a power conversion circuit comprising first and second terminals and a power output for supplying power to the electronic circuit; wherein when said battery is placed within said compartment in a first orientation said positive terminal is in contact with said first terminal and said negative terminal is in contact with said second terminal and a positive power from said battery is supplied to the electronic circuit together with an indication to the microcontroller of the positive polarity of the voltage between said first and second terminals and wherein when said battery is placed within said compartment in a second orientation said positive terminal is in contact with said second terminal and said negative terminal is in contact with said first terminal and a positive power from said battery is supplied to the electronic circuit together with an indication to the microcontroller of the negative polarity of the voltage between said first and second terminals.