4v Led Emergency Light Circuit. If you have further doubts or queries regarding the above 1 watt led emergency lamp circuit using li ion battery feel free to post them through your comments. Mr seetharaman has developed a new version of automatic led emergency light.
The led forward voltage is 4v 50ma. This video shows in this video simple how to make an emergency 4v dc led light using 3 7v tp4056 li ion lithium battery charger with protection board chargin. Mr seetharaman has developed a new version of automatic led emergency light.
There is also a built in overcharge and undercharge protection.
Three 1 w leds used in this circuit will give sufficient brightness for an emergency light. An automatic led emergency light circuit is designed to turn on when there is no adequate lighting or if the power supply is cut off. I have used it to make emergency light i used smd leds which is removed from old led buld. Earlier fluorescent lights were used to build such circuits.
