Wobbly Windbell Fun Electronic Diy Kit Wring 83 Leds Wind Bell Brand New

US $5.86

China, China
Jan 29th

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Wobbly Windbell DIY Kit Description Description: 1. Suite Features Suite Name:Wobbly Wind Bell Suite Type:YFL-80 Operating Voltage:5~9V Dimensions:92*89mm 2. Principle of Operating For YFL-80, the Q1 and Q2 form the multivibrator which used to control the flashing of these two LEDs. 83 LEDs form the pattern of a wobbly wind bell. And here is the operating principle of multivibrator. As there is difference between the components, Q1 or Q2 will be turn on at the first place after the boot. If Q1 turns on at the first place, the voltage of Q1 collector will be 0V and the LEDs of group A start light. As it cannot have a sudden change on the voltage of two ends of the capacitance, the Q1 collector with 0V will let the base potential of Q2 reduced to 0V through C1 and let the Q2 turn off. LEDs of group B turn off at this time. When the charge voltage of C1 increases to the breakover voltage of Q2, the Q2 turns on. And the voltage of Q2 collector reduced to 0V and LEDs of group B starts to light. In the same way, the Q2 collector with 0V will let the base potential of Q1 reduced to 0V through C2 and let the Q1 turn off. LEDs of group A turn off at this time. The multivibrator will operate according to this cycle to let these two groups of LEDs light by turns. And the wobble frequency of these two groups of LEDs depends on the specification of C1?C2?R21 and R22. 3. List of Components Payment 1.We accept Paypal only. 2.Please confirm your ebay shipping address is exact after payment. 3.If your purchased is more than £30.00, please offer your phone number with shipping address. Delivery details 1.All item will be shipped by Airmail post within 1 business days. It takes approximately 15-25 days (USA ,CA,AU,UK,DE).other country 15-35 days. 2.Express by EMS ,it must add 25 USD shipping fee, it takes 5-10 workdays for delivery.If you need other Epxress(DHL,Fedex.UPS etc.),please contact us to talk about shipping fee. 3.Once you purchase, please DONOT leave negative, neutral feedback or open any case if you have not received item in 30 days, because we have mentioned the shipping time repeatedly. Contact us ???? 2 1.We offer retail and wholesale services. We can provide products in accordance with your requirements. If you have any questions or something to consult, please send us ebay message. 2.All messages will be answered within 1 business day. If you do not receive our reply, please kindly re-sent your message and we will reply to you as soon as possible. 3.Our aim is to provide Top Level Customer Service, Business hours are 9am to 6pm Beijing time (+8 GMT), Monday to Friday. Engineered for professional eBay sellers!