Hello everybody! I hope you all are doing fine!!..
Coming to my problem......I have heard about a 10 led chaser circuit using the 555 timer, 4017b decade counter.....But in Chandernagore, in India, there are professionals who build circuits so as to light up large LED chasing patterns....I just got a glimpse of the circuit and i found out that the following components were present:
1. 555 timer ic
2. 2 capacitors
3. set of resistors with the timer
4. 4017 decade counter ic
5. BC 547 transistors
6. Zener diodes with each transistor(BC547). I dont know the rating.
7. Two resistors after each transistor (green in colour).
8. 2N6107 PNP transistors after each BC547 transistor..
On asking about the working about the circuit the local shopkeeper said that the output comes out from the collector portion of the 2n6107 transistor and that it is a simple led chaser circuit.
I want to build this circuit on my own.....So i need your help to finish this circuit.....I would be highly obliged if anybody of you can give me the exact circuit diagram with these components......