1.Introduction

CTR-30 flash Christmas tree kit consists of three circuit board, allows 36 LED flash alternately,showing a Christmas tree in the space of three-dimensional profile (the night environment has better viewing).

2.Parameter

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.

3.Connection Diagram:

4.Component Listing

1>. 1pcs 330ohm Metal Film Resistor

2>. 1pcs 1K Metal Film Resistor

3>. 1pcs 2K Metal Film Resistor

4>. 4pcs 10K Metal Film Resistor

5>. 3pcs 47uF 16V Electrolytic Capacitor

6>. 7pcs 3mm Red LED

7>. 6pcs 3mm Yellow LED

8>. 6pcs 3mm Green LED

9>. 3pcs S9014 Transistor

10>. 1pcs PCB CTR-30A

11>. 1pcs 330ohm Metal Film Resistor

12>. 1pcs 1K Metal Film Resistor

13>. 1pcs 2K Metal Film Resistor

14>. 3pcs 10K Metal Film Resistor

15>. 3pcs 47uF 16V Electrolytic Capacitor

16>. 6pcs 3mm Green LED

17>. 6pcs 3mm Yellow LED

18>. 6pcs 3mm Red LED

19>. 3pcs S9014 Transistor

20>. 1pcs PCB CTR-30B

21>. 1pcs Self-Locking Switch

22>. 1pcs 3.5mm DC Power Socket

23>. 1pcs AA*3 Battery Box

24>. 1pcs USB to DC 3.5mm Cable

25>. 2pcs Screw M2*8mm

26>. 2pcs Nut M2

27>. 1pcs PCB CTR-30C

5.Download the Installation Steps Here!

6.Completed Project Below: