Run a few 1 watt LEDs using transistor from 3.7v ?
It will be running on a 3.7v 4500mAh battery .
I have the LDR circuit.
The problem I face is , normal transistor are not capable of running 5W leds (1W X 5) , it just heats up.
i tried some high power transistors , they seem to provide less voltage to the leds.
I need a transistor , which can be used as a switch , it should work well in 3 v , should be able to handle max 5W.
Any one have any idea ?