I'm heavily involved with Paintball. One of the major drawbacks is that goggles tend to fog up. I've been playing around with computer mini fans for a while, and have gotten close but still no cigar.. I'm currently using 2-5vdc mini fans, in series..( both wont always turn on when in parallel),with a draw of .8W..I use a 9v battery, have been playing and alternating with resistors between 1/2W up to 2 W and between 18 to 22 Ohms.. its obvious they heat up but not enough to be a significant hazard.. I do notice that there is alot of current fluctuation and I feel this may be due to the heat of the resistor. Or please correct me if I am wrong.. I'd like to design a very simple resistive capacitive ckt,as to prolong a steady current draw..I can get the fans to work as low as 4 V and that would get me a longer run time.. When the Current starts to vary, the fans become rather annoying..
I need to keep this very simple since its being mounted on goggles.. I appreciate all your help in helping me get this figured out.. Again, thanks in advance.
I need to keep this very simple since its being mounted on goggles.. I appreciate all your help in helping me get this figured out.. Again, thanks in advance.