Three-Dimensional 3D Christmas Tree LED DIY Kit Red/Green/Yellow LED Flash Circuit Kit Electronic Fun Suite

This

circuit is composed of 16 pcs LED (light emitting diode). The 16pcs LED

divided into four groups, and each group has different flashing

frequencies, when four groups flash together, this item looks like a

small Christmas tree. The circuit is powered by a 9V battery.

Advantages:

This

circuit is simple and practical, low power consumption.It uses

integrated circuits for driving: fewer parts,and the line is simple and

easy to understand.

External Wiring Kit:

With

pluggable plug for easy replacement of parts at any time and conducive

circuit debugging. Also allows us to deepen our understanding of the

principles of the circuit in the debugging process.

This line is in the form of the oscillation circuit by the cycle generated by the following principles:

- after the first charge, the capacitor C1 & C4 charging is complete.

- capacitors C2 & C3 will continue to charge.

- when the transistor Q1 & Q4 is turned on at the same time, it discharges the capacitor C1 & C4.

-

capacitors C2 & C3 is fully charged, the transistor Q1 & Q4

will be closure, while also charging the capacitor C1 & C4 again.

- transistors Q2 & Q3 is turned on while the capacitor C2 & C3 will be discharged.

-

By analogy, the flash of speed is the oscillation frequency, and the

frequency is determined by the resistor R & capacitance C values.

- Board Size:70mm*110mm