LED Heart Box

This is a simple LED accessory for you to decorate your Valentine's day.

You need the following materials.

1. Red LED diode (dia. 3mm) , 2 pcs
2. 50 Ohms resistor, 1 pcs
3. HDX contactless sensor, 1 pcs
4. CR2032 coin battery, 1 pcs
5. CR2032 coin battery holder, 1 pcs
6. 3d printed Heart-Box component, 2 pcs (in the attachments)
7. 30 AWG solid wire
8. Lead-free solder wire
9. Hot glue
10. Masking Tape (Optional)
11. Small fasteners, 3 pcs (Optional)

You may need the following tools.

1. Soldering iron
2. 30 AWG wrapping tool
3. Hot glue gun

The LEDs are powered by the 3V coin battery. I added a contactless HDX sensor to control the ON/OFF of the circuit. The 50 Ohms is added to limit the current.

To connect the LEDs, I did not use any extra wire. I bent the leads of LED to form the circuit's track. Firstly, I soldered the cathode's leads. Then, I soldered the leads.

The leads of resistor were shortened. Firstly, I soldered the resistor to the negative lead of the battery holder. Then, I soldered the other lead of resistor to the anode of LEDs. In addition, I put a masking tape to protect the battery case.

Firstly, I wrapped 30 AWG wires to the sensor's leads. Then, the connection is secured by soldering. Next, the wires were connected to the LEDs and the battery holder.

The LEDs will be switched on when the sensor is turned upward.

I used hot glue to cover the solder joints and secure the position of each components. In addition, I adjusted the orientation and the location of the LEDs.

You can install reflective tape to enhance the visual effect of the LEDs. Furthermore, you can close the lid by hot glue or screws.

Hope you enjoy it! Happy Valentine's Day!