Energy systems
Energy Systems
What kind of circuits, series or parallel?
To operate more than one LED from a coin battery, the LEDs have to be in parallel. The same is true for an LED and a buzzer – they will work in parallel, but not in series. Even in parallel, some LED combinations won’t work. Two of the same color will always work together, and red works with yellow, but if you put green in parallel with either red or yellow, the green one won’t light up.
Series and parallel circuits are summarized below (switches are not shown):
