Initially, I have used 3 pin photodiodes, where the anode is connected to the resistor and has a wire which goes to group and the other goes to an analogue input to read the voltage. The cathode is connected to the power supply and the case is also connected to the ground.
How does this get connected? Do I still run the power to the cathode and then where do I get the voltage output from the photodiodes?
2 PIN Photodiode - https://www.mouser.co.uk/ProductDetail/720-BPX61