Product Details
1. The product uses high-quality materials and the quality is guaranteed
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 ability.
3. The flashing effect is composed of colorful LED lights. It is a very good choice whether it is for gifting or viewing.
4. The product is shipped in parts and needs to be assembled by the customer. A USB power cable is included with the shipment.
5. With lightweight design, the product has a wide range of application scenarios and can be used anytime and anywhere, which is very convenient.
Name: Colorful Christmas tree electronic production kit
Working voltage: DC5V (mobile phone charger, dry battery, etc. can be selected)
Specifications: parts with shell and parts without shell (need to assemble by yourself)
When connected to a 3-5V power supply, 37 LEDs are divided into 4 groups. Whenever the power is turned on, the 4 triodes will compete to turn on first. However, due to differences in components, only one triode will turn on first. It is assumed here that Q1 is the first to turn on. If Q1 is turned on, the LED1 group will light up. Since Q1 is turned on, its collector voltage drops, causing the left end of capacitor C2 to drop to close to 0V. Since the voltage at both ends of the capacitor cannot change suddenly, the base of Q2 is also connected to approximately 0V. Q2 cut off, so the group of LED2 connected to its collector goes out; at this time, the high voltage of Q2 increases the collector voltage of Q3 through capacitor C3, Q3 will also conduct quickly, and the group of LED3 lights up, so within a period of time Here, the collectors of Q1 and Q3 are both at low level, the two groups of LED1 and LED3 are on, and the group of LED2 is off. However, as the power supply charges C2 through resistor R2, the base voltage of Q2 gradually increases. When it exceeds 0.7V, Q2 changes from the off state to the on state, the collector voltage drops, and the LED2 group lights up. At the same time, the voltage dropped by the collector of Q2 passes through C3 and the base voltage of Q3 also drops. Q3 changes from on to off, its collector voltage increases, and the group of LED3 goes out. Next, the circuit cycles according to the process described above, and three groups of 18 LEDs will light up in turn. At the same time, two groups are When lit, these LEDs are arranged crosswise into a heart-shaped pattern, continuously flashing and emitting light to achieve a flowing display effect.
1 set of Christmas tree light DIY parts
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- Please leave note for your special request (e.g. Colors or Size) when you pay the order.
- Any special request cannot be accepted after 24 hours of payment, because most of orders will be processed instantly and same day dispatched.
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2. Orders will be processed instantly and dispatched within 1-3 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.
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