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Flashlight circuit - help needed
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makowka
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« on: January 17, 2013, 03:00:28 PM »

Hello to all board members

May name is Simon. I would like to built a head-flashlight witch such bulbs:

http://www.conrad.pl/%C5%BBar%C3%B3wka-wska%C5%BAnikowa-Barthelme,-E5.5,-3.5-V,-200-mA,-0.7-W,-5x15-mm,-przejrzysta.htm?websale7=conrad&pi=720183

Supply 3,5V, 200mA. I would like power it through 3 AAA batteries (3x1,2V), connected in parallel. The batteries would be rechargable ones, so I think, there is a need for additional components to stabilize the power supply. I want to apply two red and two green lights, so there must be a possibility to switch between the two groups of lights, turning the whole thing off and on.  I have no idea of electronics, but know some fundamental laws. Could someone please help me to design a circuit for such a flashlight?
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