DC power supply with input voltage polarity indication
A multi-mode electromagnetic radiation emitting device comprising at least one source of electromagnetic radiation which emits radiation according to predefined or programmable user selectable instruction sets is disclosed. Reversal of the polarity of the device's power supply allows for enhanced features to be accessed including multiple instruction sets per switch setting, reprogramming mode, infra-red (covert) mode, night mode and water activation mode. A switch mechanism for providing selectable switched circuit connections is also disclosed as well as a power supply for supplying DC power to an electronic circuit comprising at least one microcontroller or microprocessor.
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.
2. The power supply of claim 1 , wherein said power conversion circuit comprises a diode bridge.
3. The power supply of claim 2 , wherein said power conversion circuit comprises a DC to DC converter.
4. The power supply of claim 1 , wherein said power conversion circuit comprises a charge pump.
5. The power supply of claim 1 , wherein said power conversion circuit comprises a voltage booster.
6. The power supply of claim 1 , wherein said power conversion circuit comprises a staged voltage multiplier circuit.
7. The power supply of claim 1 , wherein said battery is selected from the group consisting of A, AA, AAA, C, D, 9V, N-Cell and Lithium.