Features:
1.The product is made of high-quality materials with guaranteed quality
2.This kit is very suitable for training welding skills and is also very suitable for DIY enthusiasts, which can greatly improve their hands-on abilities
3.Composed of colorful LED lights with a flashing effect, it is a very good choice for giving away or viewing
4.The product is shipped as loose parts and needs to be assembled by the customer themselves. The shipment comes with a USB power cable
5.Adopting a lightweight design, the product has a wide range of application scenarios and can be used anytime, anywhere, making it very convenient
Parameters:
Name: Colorful Christmas Tree Electronic Production Kit
Working voltage: DC5V (mobile phone charger, dry battery, etc. can be selected)
Specification: Loose parts with case (self assembly required)
Working principle: When connected to a 3-5 V power supply, 37 LEDs are divided into four groups. Whenever the power is turned on, the four transistors will compete to conduct first. However, due to differences in components, only one transistor will conduct first. Here, if Q1 conducts first, the LED1 group will light up. Due to Q1's conduction, the collector voltage drops, causing the left end of capacitor C2 to decrease, approaching 0V. Since the voltage at both ends of the capacitor cannot suddenly change, the base of Q2 is also connected to approximately 0V, Q2 cut-off, therefore the LED2 group connected to its collector is extinguished; At this point, the high voltage of Q2 increases the collector voltage of Q3 through the capacitor C3, and Q3 will also quickly conduct. The LED3 group will light up. Therefore, for a period of time, the collectors of Q1 and Q3 will be at a low level. The LED1 and LED3 groups will light up, and the LED2 group will go out. However, as the power supply charges C2 through the resistor R2, the base voltage of Q2 will gradually increase. When it exceeds 0.7V, Q2 will change from a cut-off state to a conduction state, and the collector voltage will decrease. The LED2 group will light up, At the same time, the voltage of Q2's collector decreases through C3, and the base voltage of Q3 also decreases. Q3 changes from conduction to cutoff, and its collector voltage increases. The LED 3 group goes out. Next, the circuit cycles according to the process described above, and three sets of 18 LEDs will light up in turn. At the same time, two sets of LEDs will be lit up, and these LEDs are arranged in a heart shaped pattern, continuously flashing and emitting light, achieving the effect of flowing display.
Package include:
1 Set Christmas tree DIY loose parts (Shipped without battery)
Type 5:Rotating Colorful Music Christmas Tree Led Flowing Water Electronic Diy Kit Christmas Decoration Gift
Features:
1.The product is made of high quality PCB material, quality is guaranteed
2.Parameters with acrylic shell and without acrylic shell optional, shipping with USB adapter cable, you can use the charger, rechargeable treasure, the computer's USB port power supply
3. Beautifully designed products, the base of the white hair blue LED to achieve the effect of breathing lights, the Christmas tree is above the colourful LED, to achieve the effect of running lights
4.Shipped as DIY loose parts, customers need to assemble by themselves
5. This is a flash rotating music Christmas tree, very suitable for DIY enthusiasts, can be used for Christmas decorations, welding practice, electronic welding training, ornaments, gifts, while you can improve their hands-on skills
Parameters of the product with shell:
Kit name: flash rotating music Christmas tree
Working voltage: DC4-5.5V
Power supply interface: DC005 (5.5 * 2.1), shipping with USB adapter cable, you can use the charger, rechargeable treasure, the computer's USB port power supply
Function: Base 18 5MM white hair blue LED to achieve the effect of breathing lights, Christmas tree above the 3MM colourful LED, to achieve the running lights, play with the passive buzzer
With shell loose parts list:
Christmas tree A board X1
Christmas tree B board X1
Rotating top PCB X1
Rotating middle PCB X1
Rotating base PCB X1
M3*25 double pass copper column X4
M3*10 double pass copper post X5
M3*10 screws X6
M3*6 screws X15
M3 Nut X4
5MM LED white blue X20
3MM LED seven colours X40
22UF 25V Electrolytic Capacitor X10
9014 Triode X7
8050 Triode X2
47KX10
100Ohm X8
100K Resistor X1
30K Resistor X1
20K Adjustable Resistor Horizontal X1
BJ1522 Music ICX1
104 Porcelain Chip Capacitor X1
8P IC Holder X1
LM358 chip X1
Passive Buzzer X1
Deceleration motor X1
DC005 Block X1
DC005 cable X1
Small spring X3
Acrylic shell 1 set X6 pieces
M3*8 screw X20
M3 nut X15
Circuit diagram and production information download address:
Link: https://pan.baidu.com/s/17y0ZXg1eqWcZViysGe3VTA
Extract code: 4fm8
Copy this content and open the Baidu.com disc mobile app, the operation is more convenient Oh!
Precautions for use:
Prohibit the use of external forces to rotate the tree, otherwise the gears inside the gearmotor will be damaged, resulting in failure to rotate.
The acrylic shell is transparent material, shipped with a layer of protective film on each of the 2 sides of the earth yellow. Installation with a razor blade to gently scrape the edge of the acrylic can be torn.
Package include:
1 Set DIY loose parts (Shipped without battery)
1.We only ship to the confirmed address provided by eBay. please make sure your ebay address is 100% matches the address you would like us to ship to. If not, please let us know before we sent you the package, or we will not be responsible for any loss. hope you could understand.
2.Orders will be processed instantly and dispatched within 1-2 business days except hoilday, so we do NOT accept any email/message note after you place orders.
3.All package need to wait 30 days,Please take care it.Less than 30 days,we can't take a refund.
1.We accept PayPal payment ONLY, and must be received within 5 days from the date of purchase.
2. It is easy and safe for you to pay by credit cards, debit cards, bank transfers and PayPal account balances.
3.Buyers are responsible for import duties,custom fees and taxes, if any, please check your country.
1.We believe our items are so outstanding. We are convinced you will be happy with your Purchase.
2. If you do not satisfy with our items. Please simply return to us within 30 Days in original condition. Just pay for the returned postage. Then we can issue full refund or resend the item to you after the returned item arrived at our warehouse.
3. Please include your eBay ID and item number with any email requests.