I am building a series circuit with a solar cell acting as the power source, photoresistor and motor. When I went to teh electronics store to get these parts they have these random voltage and current ratings which I am not aware of because this is teh first time Im building a circuit from scratch. Anyways can someone please guide me in buying the correct parts that will work properly with each other to give maximum efficiency and so it wont blow up or fry the circuit.