Why don't you choose a 9V relay? It will require a lot less current, and you can use your BC547.Well, if i change the power source to 3v the circuit wont work. it need at least 9v. the output pulse rates are fine. I got just like you said.
I suppose to use a 9v 150 mA power supply. So which transistor should i use to make the relay work? im totally out of calculations.
So can you Please tell me these?
The transistor that i should use,
R1
R2