Im not at school. Just a simple hobbyist.
I need to know because im designing a simple circuit to place a light in my car glovebox.
Ive made the circuit and it works fine, but i need to know how to optimize it, as i plan to run it on a 9v battery.
See schematic included
I might, if needed add a LDR if nessercary but just this for the moment.
Im still quite confused about the various voltage drops that occur with different components.
when i make a circuit i can do a few ohms law calcualtions but i dont know how much 'juice' to feed the other components. I also dont know how these components affect the calculations i do.
I know about voltage drops over a led, and can include them in my calcs , but i dont understand the transistor specs from the manufacturer.
thanks