2pcs Red Led Heart-shaped Flash Led Diy Kit 18pcs Leds

US $1700

Shenzhen, China
Jun 13th

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Product Name: 2pcs Red LED Heart-Shaped Flash LED DIY Kit 18pcs LEDs ???????This circuit is a cycle driving circuit composed with 3 transistors.When the supply power is switched on,only 1 transistor can be connected because of the difference among the connected order of the 3 transistors.Suppose V1 connected at first,then it?s collector voltage downs,it is the left of capacitor C2 downs,approach to 0V.At the same time,the base of V2 is also drawn to 0V approximately,then V2 cut off,the collector of V2 becomes high voltage,LED7-12 is extinguished.Through the capacitance C3,the high voltage of V2 makes the base voltage of V3 rises,V3 is connected immediately.Now the collector of V1 and V3 are in low voltage,LED7-12 goes out,LED1-6 and LED13-18 light.However,with the resistance R3 charges to C2(actually is C2 discharge),the base voltage of V2 increased gradually,when it exceeds 0.6V,V2 becomes connected state from off state,the collector voltage drops,LED7-12 lights.Through capacitance C3,the declining voltage of collector V2 makes the base voltage of V3 downs,V3 becomes connected from off,it?s base voltage rises,LED13-18 out.Next,the circuit cycles according to the above process,3 groups,18 LED will be lighten in turn,these LED are arranged into a heart,they are lighting constantly,reaches the flowing effect.Change the capacitance of C1,C2,C3 will change the cycling speed.The power can use 2pcs AA or AAA dry battery. 1) We accept PayPal payment ONLY. 1) All items will be shipped to your PayPal address . Please update your latest address when you check out. 2) Most of items will be shipped via Honkong Airmail / Singapore Airmail. 3) All items will be shipped within 1-3 working days after payment received( excluding Sat, Sun & Holiday ). And you will get a notification email in your PayPal address after the package is shipped. 4)Tax: We're NOT responsible for tax duty.The tax depends on each country's custom.Please pay attention to it. 5) Shipping time is 7-20 business days to most of countries, please view below table for exactly shipping time to your location. 7-15 working days to: USA,Most of Asia countries 10-16 working days to: Canada, Australia, UK, Most of Europe countries 12-18 working days to: France, Germany 15-25 working days to: Italy, Spain, South Africa 20-45 working days to: Russia,Brazil, Most of South America countries 1. No-Question-Asked Refund! If for some reason you're not satisfied with our service or product quality, please contact us within 3 days after you get the package, you can return the products to us in original package and we will refund your money after we get the package!(Shipping cost is NOT refundable and you should be responsible for the return shipping) Note: Please contact us for the return address and the return number. 2. No-Question-Asked Replacement! Although we test each item and they are packed professionally, few item(less than 0.1%) might be damaged during the shipping. You are welcome to contact us within 3 days after you receive your package about replacement. 3. Repair Some items might be broken caused by improper use, we are always happy to offer any helpful repair service. Of course, you can send the broken items back to us and we will help you resolve the situation and charge reasonable repair fees. Please feel free to contact us if you have any question. a On Mar-24-16 at 23:19:51 PDT, seller added the following information: inkfrog terapeak On Jun-13-16 at 12:09:32 PDT, seller added the following information: