headlights????

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    • July 28, 2003 at 10:39 pm #11198
      Avatar photothe_bit
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      • Posts: 108

      does anyone know wat can i use other than a button cell to produce power to my bit’s lights.

    • July 29, 2003 at 7:25 pm #22241
      Avatar photoShypo
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      • Posts: 2339

      you can use the cell which is actually in your bcg

    • July 29, 2003 at 8:14 pm #22243
      Avatar photoph2t
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      • Posts: 2088

      Most times Shypes the voltage of the batt (1.2V) is too low to power most LED’s (Assuming the_bit is talking led’s here). I *think* the lowest voltage is about 1.6V (for a red LED) the highest I’ve seen is 3.6V for some ultrabright blue LED’s.

      The most popular is to use a 3V lithium battery and wire the leds to that. Although ideally you should also wire in a 220Ohm resistor to limit current to the LED’s.

      I’ve been building DCDC converters that take the 1.2V from the bar’s batt and raise it up to 5V, very handy for driving those LED’s. And it runs off the car batt so no replacing the lithium battery.

      5v_lights1.jpg

      If there’s enough interest I might bring out my own headlight kit based on these dcdc converters….

      ph2t.

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