DIY 5mm LED Flashing Circuit Soldering Kit with Two LEDs

Electronic DIY Project with 9014 Transistors and Alternating LED Flashing

An educational DIY electronics kit for assembling and soldering a simple flashing LED circuit. Designed for electronics beginners, students and hobbyists who want to learn about basic electronic components, transistor switching and astable multivibrator circuits.

The circuit uses two 9014 transistors, two electrolytic capacitors and resistors to form an astable multivibrator. The two LEDs flash alternately: while one LED is illuminated, the other is switched off, and then their states change. This creates a continuous alternating flashing effect.

All components must be mounted and soldered onto the printed circuit board. Component positions are marked on the PCB to make assembly easier and help beginners practise identifying, positioning and soldering electronic components.

Technical Specifications:

• Type: DIY electronic circuit assembly and soldering kit

• Function: alternating flashing of two LEDs

• Operating principle: astable multivibrator

• Operating voltage: DC 3–14V

• LEDs: 2 × 5mm

• Transistors: 2 × 9014

• Electrolytic capacitors: 2 × 22µF

• Resistors: 510Ω and 30kΩ (quantities depend on the kit version)

• PCB dimensions: approximately 23 × 23mm

• Power connection: via the included Dupont wires

Package Includes:

• 1 × PCB

• 2 × 5mm LEDs

• 2 × 9014 transistors

• 2 × 22µF electrolytic capacitors

• 510Ω and 30kΩ resistors

• 2 × Dupont connecting wires

Applications:

• Basic electronics education.

• Practising electronic component soldering.

• Learning about transistor circuits and astable multivibrators.

• Practical projects for beginner electronics enthusiasts.

• Experimenting with flashing LEDs and simple electronic circuits.

Important: This product is a DIY kit containing separate electronic components and a printed circuit board that must be assembled and soldered by the user. It is not a finished or pre-assembled device. A soldering iron, solder and basic assembly tools are required. The power supply is not included unless specifically stated in the package contents.