Emergency Lamp On after Loss of Line Voltage

263

03:40:46

Left light is neon NE-51 bulb line voltage indicator.  Now, open switch bottom left by A.C. generator.  Shortly, 100 uf capacitor bleeds off voltage after line power stops for several seconds until transistor is able to conduct turning 6 volt battery #40 lamp on.

Parts information:  all resistor values are 1 watt, diodes 1N92 in 200 PIV silicon rectifier diodes or similar, 6 volt Ni-Cad  rechargeable battery.  

Operation: about 1 hour light using battery power on #40 light.  Battery may need several days to fully recharge after line voltage is restored with the slow trickle charge system.

published 10 years ago

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.