DIY Kit Colorful 3D Christmas Trees Kit MP3 Music Box with Shell for Christmas Gifts

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DIY Kit RGB Flashing LED Circuit Colorful 3D Christmas Trees Kit MP3 Music Box with Shell for Christmas Xmas Gifts

$20.99

~~$29.99~~30%

Quantity	3+	5+	10+
Price	$19.40	$19.20	$18.80

00d : 00h : 00m : 00s

Item ID: 12368

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Product Details

Description:
The Christmas tree music DIY suite consists of three circuit boards and components. You need to weld by yourself. The 53pcs 5mm LEDs flicker following the rhythm of the music. It presents a three-dimensional effect of the Christmas tree. The night viewing is better.

Features:

1>. Automatically flashing after power on;

2>. Support MP3 format music;

3>. Support TF card;

4>. Support U disk;

5>. Built-in 2W amplifier function;

6>. Comes with 4ohm 3W speaker;

7>. Support music output;

8>. Support volume adjustment;

9>. Support voice control: Previous,Next,Start/Pause.

Parameters:

1> Operating voltage: DC 5V

2> Power Type: MINI USB

3> Installation Size: 8888218mm

4> Circuit board material: double sided 1.6mm RF-4 PCB.

Installation Attention:
It consists of 53 identical white transparent LED lamps. After the lighting, it will change the regular color of seven colors. When in the test, you should stay a few seconds after lighting to see the transformation of the lantern. Welding position is not distinguished, welding at random position, long foot as positive pole.

Schematic Diagram(PCB-B):

Working Principle:

From the schematic diagram, when connected with 3-5V, 18pcs LEDs are divided into 3 groups. When the power is on, one of the 3 transistors will be the first one to be connected.

If Q1 is the first connected, the LED1 group is lit. Due to the Q1 conduction, capacitance C2 close to 0V and Q2 to 0V too; Group LED2 goes out. At that time high voltage flowing from Q2 to C3 increases the Q3 voltage, thus connecting Q3 in this circuits; Group LED3 is lit. In this case, Q1 and Q3 collector are low level, group LED1 and LED3 is lit, LED2 goes out.

But when power flows through R2 and charges the C2, the base voltage of Q2 gradually increases; when Volt is over 0.7V, Q2 is connected, and group LED2 is lit. At the same time, base voltage of Q3 decreases, Q3 is cut off, group LED3 goes out. In all, the circuit repeats the process described above, and the three group Leds will be lit by turns, 2 of which will be lit at the same time to reach the waterfall light effect.

Component List:

NO.	Component Name	PCB Marker	Parameter	QTY
1	SMD Capacitor	C1-C3,C5-C7	luf(105)	7
2	SMD Capacitor	C4,C11	104(0.1uf)	2
3	SMD Capacitor	C9	100PF	2
4	SMD Resistor	R1-R4	1K(102)	5
5	SMD Resistor	R5	4.7R(4R7)	2
6	SMD Resistor	R6	0R(000)	2
7	SMD Resistor	R7	20K(223)	2
8	SMD Resistor	R8	47K(473)	2
9	SMD Resistor	R9	22K(223)	2
10	SMD Resistor	R10	33K(333)	2
11	SMD Resistor	R11	51K(513)	2
12	TF Card Socket	TF1		1
13	IC	U1	SOP-16	1
14	8002B	U2	SOP-8	1
15	Mini USB Female Socket	USB2	Min USB	1
16	USB Female Socket	USB1		1
17	Electrolytic Capacitor	C8, C10	220UF/16V	2
18	Button	S1, S2 ,S3		3
19	LED	LED1, LED2, LED3, LED4	3mm Pink LED	5
20	Audio Socket	P1		1
21	Speaker Pin	SP1		1
22	Speaker			1
23	Self-locking switch	SW1		1
24	Metal Film Resistor	A:R2,R4,R6 B:R2,R4,R6	100R	7
25	Metal Film Resistor	A:R1,R3,R5 B:R1,R3,R5	4.7K	7
26	Electrolytic Capacitor	A:C1,C2,C3 B:C1,C2,C3	47uf/16v	6
27	S9014	A:Q1,Q2,Q3 B:Q1,Q2,Q3		6
28	LED	A:D1-D26 B:D1-D26		58
29	PCB			3