Today I’m going to show you how to create a simple yet customizable LED and battery circuit that’s perfect for putting inside your next project. This is a great first soldering project! Follow along with the video to practice your technique.
The most basic LED circuit can be made by sandwiching the legs around a coincell battery. This is also a good way to identify the positive and negative legs of the LED since it will only light up one way. That’s because LEDs are diodes, which allow electricity to flow one way, but not the other. The positive side of the battery should be touching the positive, usually longer, leg of the LED.
Put a little tape on it, and you can enjoy the glow for about a day before it gradually dies out. This is a hacky way to add LEDs to projects that only need to work for a short time, like costumes and props.
If you want to create a durable circuit, it’s time to bust out that soldering iron. In addition to your LEDs, you’ll also need resistors, some wire, some heat shrink tubing, a three-cell battery holder, either triple-A or double-A, and a switch, if your battery holder doesn’t have one already.
For this project, you will need:
- 3xAA or 3xAAA battery holder
- Switch (if your battery holder doesn’t have one already)
- Heat shrink tubing
- Soldering iron
- Wire strippers
- Flush cutters
- Helping hand tool
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