Hi any expert please help. Thanks
I have DIY a lighting system with LED. Anything wrong with my work?
Using 4 X 1.5V Alkeline batteries connected 2 in parellel and 2 in series = 3V, attached to a step up circuit from 3V to 12V which then connected to 6 X K2 3W Leds input current 4.5V - 5V each 3in parellel and 3 in series.