NPN switched emergency light v2 FIXED..an example of using NPN transistors in an inverter config so that when the switch is opened the LEDs turn on instead of the usual way. The switch is supposed to represent a power outage and the DC supply would be a wall wart adapter plugged into the light. Some changes have been made to the circuit based on info from agentaero and some of my own - switch was moved to better simulate an outage,diode added so circuit now works properly,resistor values changed to reduce idle current when LEDs are off and finally a spdt switch added to provide 2 led power levels.
