Photodiode amplifier circuit
You can operate the photodiode in "photovoltaic" mode and then you don't need a negative supply. In this case the diode generates a current in the same way as a solar cell. You may give up some speed and sensitivity operated in this way.

It requires an opamp that can operate with zero volt at the inputs (the LM324 can), these are often referred to as "single supply" opamps.  A CMOS input opamp would be better as the bias current won't cause problems.

The circuit is below. Depending upon the capacitance of the diode and the wiring (don't use long leads to the photodiode) you may need the capacitor C1 to avoid instability.







simulate this circuit &ndash; Schematic created using CircuitLab