I'm a mechanical engineering student and I have a little home project I'm hoping to work on. Unfortunately the only electric circuits class I had to take taught plenty of theory but very little about practicality so I am still at a loss when it comes to designing more complex circuits than the basic ones to prove class concepts.
I'm trying to create a simple circuit that will have multiple leds connected to it (those leds will have fiber optics running off their tops). It seems like connecting them in parallel would be the way to go. If I have a prototype board,a power supply, and a method of turning on and off the power, could I simply solder those leds to wires and create a parallel circuit without any additional elements? I've heard I should include a resistor before each led, but how would I go about choosing which resistor to use, the smallest possible? Would this circuit need any diodes or bridge rectifiers?