LM741: voltage comparator Issue
You should have a zener diode about 2 volts in the place of the wire between pin 2 and GND to have any sensing. Still the circuit would be bad, because 

1) nobody quarantees that 741 works properly at 3V. You should use a proper comparator which is designed for single supply operation, can sense near GND (741 cannot in single supply applications) and works at 3V.

2) you need hysteresis to prevent fast ON-OFF oscillation near the treshold due noise and other slight variations

3) there should be a big capacitor between the supply voltage pins of the comparator to prevent oscillations caused by supply voltage wire resistance and inductance.