SNAP CIRCUITS BRIC: STRUCTURES - Leds in Series & Parallel

To Next Page

To Previous Page

Project 11 LEDs in Series & Parallel

Build the circuit as shown, and turn

on the slide switch (S1). The LEDs (D8,

D11, & D12) light; watch how their

patterns change.

Try swapping the LED locations and

replacing one with the blue LED (D9),;

try all combinations and see how the

eects change. You can also place the

unused 3-snap wire where the color2

LED is and see how the circuit changes.

Here the color LED and blink red LED are connected in

parallel, and then connected in series with the color2

LED, to produce some interesting eects. The electricity

from the batteries ows through the color2 LED, then

splits up between the color and blink red LEDs, then re-

combines in the switch before returning to the batteries.

When LEDs are connected in series the battery voltage

may not be strong enough to fully turn them on. Red

light is easier to produce then the other colors, and so

turns on more easily.