Christmas Tree LED DIY Project Electronic Learning H2B6 RGB LEDs Flashing W8H5

Description

Description
Description&Preview
shipping&policy
Description:
Product Selling Point:
1.What Is STEM DIY soldering learning kits with the Christmas tree shape after assembled, 3D Christmas tree DIY soldering kit is aimed to improve users' electronics knowledge and soldering skills and make your life better!
2.Good Home Decoration Our 3D three-color Christmas tree is made of 36pcs 3-color LED diodes that will make a bright, colorful, and romantic light in dark space. That will be a wonderful decoration in the room, especially at the festival(such as Christmas)!
3.The small Christmas tree kit consists of two light boards and a light board base, composed of a tree-like shape, the LED on the two light boards in the tree shape of the board shows the same alternating flashing water, has a very beautiful effect.
4.Basic Parameter DC 4.5V-5V working voltage can be powered by 3 x AA battery or USB power adapter directly (Comes with the battery holder and USB cable);
5.This kit is perfect for exercising your welding skills. This is a great choice for you to enjoy DIY moments yourself and also as gifts for your friends and family.
Product Specification:
Product Name:3D Christmas Tree LED Electronic Learning Kit.
Size :70mm*110mm.
Color:Colorful lights/tricolour light
Supply Voltage: DC 9V.
Weight:70g
Oscillation Circuit Working Principals:
1.after the first charge, the capacitor C1 & C4 charging is complete.
2.capacitors C2 & C3 will continue to charge.
3.when the transistor Q1 & Q4 is turned on at the same time, it discharges the capacitor C1 & C4.
4.capacitors C2 & C3 is fully charged, the transistor Q1 & Q4 will be closure, while also charging the capacitor C1 & C4 again.
5.transistors Q2 & Q3 is turned on while the capacitor C2 & C3 will be discharged.
6.By analogy, the flash of speed is the oscillation frequency, and the frequency is determined by the resistor R & capacitance C values.
common problem:
1. First of all, if the light does not light up after welding, this is not a quality problem of the light. You can use the button battery 2032 to test the LED before welding to verify that the test voltage is 3.0-3.5V and the current is about 20mA. After we have welded 50 sets of tests, the causes of lamp failure include electrostatic damage to LED of electric soldering iron, welding and ironing damage to LED, bending pin damage to LED. Generally, if it goes well, there are more than two lights that are not on, and we can replace them with two or three more lights we gave. Beginners can buy more at the store! Thank you very much!
2.The recommended welding sequence is to first weld the components of the bottom plate, and then weld the resistors of A and B lamp boards --LED-- transistor -- electrolytic capacitor. The LED on top of A plate is assembled and then welded.
3.The resistance value should correspond to the one marked on the board.
4. Pay attention to the positive and negative poles of the LED lamp, and the long pin is the positive pole. The welding time of the LED lamp is as short as possible to avoid burning the LED.
5. The triode is plugged in according to the shape on the board.
6. Pay attention to the positive and negative electrodes of the electrolytic capacitor, and the long pin is the positive electrode.
7. Finish welding a lamp panel can use 5 v power supply first received the board are negative, under test to check for the light not bright, if a light is not on, check the welding welding and damage phenomenon and then replace the lamp, if it is parallel with schematic diagram as six light is not on, check the six light welding short-circuit phenomenon, if not bright, Check the whole circuit welding short circuit, welding, power supply contact and other problems.
8. When assembling the lampboard and the bottom plate, pay attention to the positive and negative poles of the lampboard and the bottom plate to correspond to one by one. If it is wrong, it is difficult to disassemble.
Package include:
1 set.
Note:
1.Please Allow 1-2cm Differences Due To Manual Measurement.
2.Due To The Light And Screen Difference,The Item Is Color May Be Slightly Different From The Pictures.
Service Guarantee:
If you have any questions about our products, please feel free to contact us, we will provide you with quality services and the best solutions.
Preview:
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