Digital system to monitor house doors

Automatic Dressing Room Lightning System Project working: Whenever the external Door Switch (such switches are also known as magnetic switches) is closed the Bulb glows & turns off when the internal door switch gets open. The general-purpose Op-Amp IC 741 here works as differentiator circuit. The circuits is built using Resistors, Capacitors, Op-Amp IC 741, Timer IC 555, SPST Switch, Battery, Bulb. Components Used: R1: 70k ohm R2: 10k ohm R3: 50k ohm R4: 22k ohm R5: 10k ohm R6: 10k ohm R7: 10k ohm C1: 470 uF C2: 0.01 uF IC 555 Op-Amp IC 741 DC Voltage Source : 12 V SPST Switch Bulb 2 Voltage Probs