Autodisconnect lighting electronic circuit diagram project

This scheme is a simple circuit for electronic autodisconnect lighting. This autodisconnect lighting circuit is based of known type 7555 CMOS timer connected as monostable. The component values from this circuit diagram introduces a delay of about five minutes before the light goes off. If you want to change this delay time can be modified components R1 and C1 values as t = 0.69 xR1xC1 [seconds] where R1 is in ohms and C1 in farads. Resistors R2 and R3 are designed to hold extra trigger inputs, the reset sensors that are used to trigger monostable or reset before the delay time elapses. T1 timer command output it through R4.