Introduction: DIY 3D Christmas Tree Kit With RGB Flashing LEDs
CTR-30 flash Christmas tree kit consists of three circuit board, allows 36 LEDs flash alternately, showing a Christmas tree in the space of three-dimensional profile (the night environment has better viewing).
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.
Step 1: Details About This Christmas Kit
Work Voltage: DC4.5-5V
Power Type: AA*3 battery or USB Cable
Installation Size: 60mm*136mm*60mm
Step 2: Component Listing
Check this listing and make sure that you get all the components in this package!
Step 3: Component Description
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
Step 4: Installation Steps-Install CTR-30A
Step 1: Install 1pcs Metal Film Resistor 330ohm on R6, 1pcs 1K on R4, 1pcs 2K on R2
Step 2: Install 3pcs 10K Metal Film Resistor on R1,R3,R5
Step 3: Install 1pcs 10K Metal Film Resistor on R7
Step 4: Install 6pcs Red LED on D1-D6.
A. Note the direction of the LED
B. Control distance between PCB edge and LED head(Two ways).
1). User can bend the LED pin at first after determining the distance and then insert LED to PCB through hole;
2). Insert LED to PCB through hole at first.Then determine the distance.Bend the LED pin at last.
Step 5: Install 6pcs Yellow LED on D7-D12,6pcs Green LED on D13-D18
Step 6: Install 3pcs 47uF 16V Electrolytic Capacitor
Step 7: Install 3pcs TO-92 S9014 Transistor
Tips: It is better to bend S9014's pin so that 2pcs PCB CTR-30A and CTR-30B can better splicing. OK, CTR-30A has been installed completed.
Step 5: Installation Steps-Install CTR-30B
Step 8: Install 1pcs Metal Film Resistor 330ohm on R6, 1pcs 1K on R4, 1pcs 2K on R2
Step 9: Install 3pcs 10K Metal Film Resistor on R1,R3,R5
Step 10: Install 6pcs Green LED on D1-D6.
Step 11: Install 6pcs Red LED on D7-D12, 6pcs Yellow LED on D13-D18
Step 12: Install 3pcs 47uF 16V Electrolytic Capacitor
Step 13: Install 3pcs TO-92 S9014 Transistor
Step 14: Connect 5V to CTR-30A and CTR-30B. Preliminary welding success if LEDs are blinking automatically
Step 6: Installation Steps-Stitching CTR-30A and CTR-30B
Step 15: Align the two positioning heads on CTR-30A and CTR-30B and then fixed with tin.
Step 7: Installation Steps-Install CTR-30C
Step 16: Install Power Socket.Use a superfluous pin to fixed the power supply socket.This pin can come from resistor.
Step 17: Install 1pcs Self-Locking Switch. Note the direction of switch. The concave side is close to the PCB edge.
Step 18: Install battery box and fixed by screw/nut. Tips: First peel the insulation of the wire, and then welding fixed, and then cut off the excess wire
Step 19: Fixed CTR-30A and CTR-30B on CTR-30C.Align the two positioning heads and then fixed with tin.
Step 20: Install the top LED. Note the positive and negative of LED.At this point, the installation is complete!!
Step 8: Effect Demonstration
When you finish all the steps, you get a beautiful 3D Christmas Tree Kit with RGB flashing leds.
That would be a good choice for your Christmas projects 2017, and enjoy this easy soldering with your kids. Video will be added soon. How do you like this Christmas Kit? Share your ideas and similar projects with us ^0^
Question 1 year ago
this is sweet! How would it be possible to make the flashing rate and brightness adjustable via two pots?
I would like to take a totally different approach and not make this set but make it with all warm white LED's mounted in the shape of a dandelion.
Could I replace R7 with a pot (rate) and add another between main circuit and power (brightness) or will it still be a fixed rate due to the capacitators?
Do I have to add a 555 timer to make the rate adjustable?
Ok, while writing this I searched for a bit more and found a few things. Ill head back to this post with more detailed questions as soon as I've figured it out. Thank you anyways
Tip 4 years ago
Nice description, but not correct: resistor values are wrong on the CTR-30B panel, which results in too low brightness of the green led (as it can be seen on your video).
Correct values are R2=330, R4=2k, R6=1k and then LEDs on CTR-30B will have the same brightness as on CTR-30A (which has the right values: R2=2k, R4=1k, R6=330)
Reply 3 years ago
Thank you, I placed the resistors as you suggested and the tree works perfectly as all the LEDs light up at the same intensity.
5 years ago
I'm gonna make this stuff!
Reply 5 years ago
Amazing! looking forward to your project Waren ^0^
5 years ago
That's so adorable! My nephew is starting to get interested in electronics projects, I wonder if he'd like to try this. :)
Reply 5 years ago
wow, much thanks for your like kk. We have detailed instructions here if your
nephew want to have a try. haha and this is a good choice for the Xmas gift.