SMD Star LED Soldering Kit SMT Christmas Decoration Electronic Ornament

An Electronic Star Tree soldering kit. Solder it together to get an ultra thin 20 LED star! SMD components for advanced solderers to put together.

A "breathing light" is often called a pulsing light or breathing LED. This effect is common in electronics and refers to an LED that gradually increases and decreases in brightness, simulating a "breathing" motion. In technical terms, it's created using pulse-width modulation (PWM) to adjust the LED's brightness in a smooth, cyclical pattern.

It's often used in electronics to signal standby mode or to give a visually calming effect.

Features

• miniature Xmas gadget
• 20 LEDs to solder on for practice!
• star can be hung (e.g. from the ceiling or Xmas tree) or can be worn as a badge
• great attention grabber
• ideal introduction to SMD (Surface Mounted Device) technology
• some extra parts are supplied, in case some get lost or damaged

Specifications

• power supply: 4V - 6V (recommended battery packs: 4 AA Battery Pack or 2 Coin Cell Battery Pack)
• power consumption: 5mA approx.
• dimensions: 1.75 x 1.6 x 0.3"

Assembly Instructions:

1. Install Blue LEDs: Place 20 SMD 0805 Blue LEDs on LED1 to LED20. Ensure the negative terminal of each LED, marked with a green dot, aligns with the ellipse pad (negative) on the PCB.

2. Install the LM358 IC: Position 1 SOP-8 LM358 IC at U1. Match the small dot on one corner of the IC with the corresponding white dot on the PCB, indicating the correct orientation.

3. Install the Transistor: Place 1 SOT-23 S8050 Transistor at Q1.

4. Install the 22-ohm Resistor: Place 1 SMD 0805 Resistor with a value of 22 ohms at R5.

5. Install the 33K-ohm Resistor: Place 1 SMD 0805 Resistor with a value of 33K ohms at R6.

6. Install the 47K-ohm Resistors: Place 3 SMD 0805 Resistors with a value of 47K ohms at R1, R2, and R4.

7. Install the 100K-ohm Resistor: Place 1 SMD 0805 Resistor with a value of 100K ohms at R3.

8. Install the 47uF Capacitor: Place 1 SMD 0805 Capacitor with a value of 47uF at C1.

9. Install the Battery Box: Attach a 4V to 6V battery pack to the place marked DC5V. The red wire is + and the black wire is - (recommended battery packs: 4 AA Battery Pack or 2 Coin Cell Battery Pack)

10. Connect to Power Supply: Power up the circuit and enjoy the blue LED star's slow fade light effect!