How to Turn LED on With AA Battery

It is not difficult to turn on an LED with AA batteries. In this project, we learn how to turn the LED on with two AA batteries.

The materials we need are:

• 1.5V AA Battery × 2
• 330Ω Resistance × 1
• LED × 1
• Copper Wire × 1
• Small Size Aluminum Foil × 2
• Tape × 1

Connect two 1.5V AA Batteries in series and secure with tape. Here, we need to create a very small space between the batteries. Otherwise, the LED will not turn off until the battery is depleted.

Connect the aluminum foil, the anode (the longer leg) of the LED, and the copper wire to the anode and cathode of the batteries, respectively. And secure with tape.

Connect the cathode of the LED (the shorter leg) and 330Ω resistance. Next, connect resistance and copper wire which connected to the cathode of batteries with aluminum foil.

Apply force to the batteries to make them meet. Then, LED will be turned on.