photodiode circuit setup
It look like you are trying to make a trans-impedance amplifier.


You are using black for 5V and orange for ground, which is electrically ok but is confusing.
The UA741 require at least 10V of supply voltage to work properly (TI datasheet 6.2).
The positive input terminal of the op-amp must be within the common
mode input voltage range. For your op-amp, it's typically -/+ 13V
when powered with -/+ 15V, so this pin must be set to a reference
voltage within \$V_{vcc-} + 2 &lt; V_{ref} &lt; V_{vcc+} - 2\$