Q20 stuck on finalising device setup
Site Down 12/13/18
Exchange 2010 to 2013 Migration with BES10
Can I try to sell my BB Classic Q20 here ?
Third Quarter revenue drops, but profit beats estimates
finalising device set up stuck
This item has been shown 48 times.
Funny DIY Kits !--Electronic-lover come !
This circuit consists of 38 LEDs to form a butterfly image. Among them, 14 red LEDs form the middle heart, and 24 white LEDs form the two wings of the butterfly. The red heart is always on and the white wings will continuously flash to display flying effect. In the meantime, the buzzer will sound the song of “Happy Birthday to You”
When power on, the two triodes VT2, VT3 will compete to connect. Since there is difference among components, only certain one triode will be connected firstly. If VT3 is firstly connected, then VT3 collector voltage will decrease, LED1-12 and LED27-38 will be on. The right port of the capacitor C2 is close to zero voltage; because the two ports voltage of the capacitor cannot change suddenly, VT2 base will become zero voltage nearly (or negative voltage, if original C2 has power), and VT2 will close. With the C2 charging by resistor R3 (usually C2 discharge via R3), triode VT2 base voltage will increase; when it is higher than 0.6V, VT2 will be connected from cut-off status and the collector voltage will decrease then close to 0V. At the same time, with the decreasing of triode VT2 collector voltage, the triode VT3 base voltage will decrease too under the effect of capacitor C2. VT3 will be cut-off from connected status and all the white lamps are off. Then cycle it, the two triodes in circuit will be alternatively connected and cut-off so that the wing LED will flash all the time. Changing the resistance value of R2, R3 or the capacitance can change the flashing speed. Changing the resistance value of R4 and R5 can change the brightness of LEDs. The IC is music diode, it defaults “happy birthday to you”, you can change it to other music diode according to your needs. The music sounded by triode is amplified by VT1 and drive the buzzer.
1.All components should be installed close to the board surface
2.When you cut the pin, please do not pull the pin forcefully; otherwise, it will cause open circuit
3.All the LED directions should correspond to the symbol
4.Power voltage should be 3-5V. Usually red, yellow, green LEDs adopt 3V power supply, and the white, blue LEDs adopt 4-5V power supply
NOTE:You can complete the installation by PCB silk screen and component listing.
Finished picture&effect picture:
*We ship items to Worldwide. Thank you!
*we will ship out the order in 1-2 business days after payment cleared .Since it is international shipping ,delivery time is about 15--28 business days to arrive to most countries.
*If you choose expedited shipping, please confirm your phone number on address and make us a note about the custom declare price, It is very important.Payment Method
We accept Paypal ONLY. It is easy and safe for you to pay by credit cards, debit cards, bank transfers and PayPal account balances.Returns Policy
* We believe our items are so outstanding. We are convinced you will be happy with your Purchase.
* If you do not satisfy with our items. Please simply return to us within 30 Days in original condition. Just pay for the returned postage. Then we can issue full refund to you after the returned item arrived at our warehouse.
* Please include your ID and item number with any email requests.Contact us for Discount!
We are almost a supermaket, and mainly selling Buniness Electronics, 3C Accesorries, Home Garden items, Baby parts , Car&Motor Accessories and for more!!!
Apart from the online items, if you need any other items, you can also contact us to supply for you.