I have a device that comes in two flavors.
1) 5 leds ( if-red ) on the right in series. With a 22 ohm resistor. and 5 leds ( if-red ) on the left in series. With a 22 ohm resistor.
2) 3 leds ( if-red ) on the right in series. With a 47 ohm resistor. and 3 leds ( if-red ) on the left in series. With a 47 ohm resistor.
They both use a near 7.5 voltage source. These devices are connected to a video game console ( Nintendo wii for those that are wondering ) via a proprietary connection. I simply want to convert this to a DC power adapter. Easy enough right?
Well here in lies the problem. When I find a suitable power supply and connect it up all works great for 3 days at which point the first Led or last depending on how you see it, burns up. I also want to point out that the resistor remains very hot. So hot that its not friendly to the finger. So one would think its simply drawing too much current. Though why?
I dont own one of these consoles so I dont know the current being drawn but I think its in the 80 milli volt range ( just a guess ). Calculating it I get around 300 milli amps. Both versions seem to do the something. From what I read the current is constant fom the console and does not shut of for any amount of time.