In my kit I have 3 different types of capacitors. There is a blue square, and orange circle capacitor that was never used in any project.
There are also two different types of transistors, only the MOSFET was used in my project, the smaller one that looks just like the temperature sense was never used.
So, how are these capacitors and transistors that were never used different from the ones that were? What do they do? Does it matter what type of transistor or capacitor I use? I'm not sure if it's a personal preference or if there is something functionally different between the parts.
The book says the larger blue capacitors can leak and damage things, so why don't I just use that orange/round capacitor that doesn't leak in all my projects?