monostable mode of NE555 chip

This is a basic and important circuit and working principle of popular ciruit NE555. this circuit can be operated with various sensors instead of switch. the circuit can be assembled as shown below and can be simulated using proteus simulator.

working of a circuit when the switch is closed then the lower led will glow and hold for some time until the charge of capacitor finished. after then the lower led will be off and the upper led will glow. again when we press the switch than the same process repeats. if you have any confusion, please ask me...................