About this Item
Christmas tree led flashing lights small DIY puzzleColour:green Material:metalThe circuit is composed of 16 LED (light-emitting diode). The 16 LED is divided into four groups, and each group has a different flashing frequency, when the four groups of LED lights together after the flash, like a bright Christmas tree, and this circuit from the 9V battery.The advantages of this circuit: simple and practical, low power consumption, and the circuit is the use of integrated circuit drive, fewer parts, easy to understand the line, the package of external connections, all with plug plug, easy to replace parts at any time And conducive to circuit debugging. But also let us in the debugging process to deepen the understanding of the principle of the circuit.This line is generated by the cycle of the oscillation circuit, the principle is as follows:1, after the first charge, the capacitor C1 & C4 charge is completed.2, the capacitor C2 & C3 will continue to charge.3, when the transistor Q1 & Q4 conduction at the same time, the capacitor C1 & C4 will discharge.4, capacitor C2 & C3 is fully charged, the transistor Q1 & Q4 will be closed, and capacitors C1 & C4 again charge.5, transistor Q2 & Q3 conduction at the same time capacitor C2 & C3 will discharge.And so on, the flash speed is the oscillation frequency, and the frequency value by the resistance R & capacitor C value of the decision.Package Contents:1 X Christmas tree led flashing lightsNote: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.About UsWe provide the good product with the best price,we support Wholesale/Drop Shipping Order1. For Drop Shipping order, please remark"dropshipping order", we will prioritize it.2. For Wholesale/Drop Shipping orders, if you have any ideas about the price or package,please contact us in advance,we will give you the best service to satisfy your demands.About Shipments1.We will send out the orders ASAP once your payment is completed normally.2.Please write your complete delivery address with correct phone number and zip code, especially please confirm your full name.About After-sale ServiceWe are reliable seller and we have our professional after-sale service for all of our customs. If there is any question about the order,please contact us in advance ,we will always here until you get a happy answer.About Feedback1. Please check the package and item when you get carefully to make sure there is no problem.2. If you have any problem or are not entirely satisfied with your package,please don’t be hesitate to contact us first before leaving negative feedback. We will resolve the problem to satisfy you.3. If there is no problem, please leave us five star positive feedback.Your affirmation is our greatest motivation ! !
