In the circuit shown in the attached image I am using a ferrite core wound with approximately 40 turns and center tapped .
I'm using a 1.5 volt battery and a white led.
The circuit is shown with a 2n3904 or a bc547.
I found the circuit on you tube at https://www.youtube.com/watch?v=pu1UlF5Owpk
The led does not light when I used either 2n3904 or bc547 but works fine with a 2n2222
Can anyone explain why ??
Thanks
I'm using a 1.5 volt battery and a white led.
The circuit is shown with a 2n3904 or a bc547.
I found the circuit on you tube at https://www.youtube.com/watch?v=pu1UlF5Owpk
The led does not light when I used either 2n3904 or bc547 but works fine with a 2n2222
Can anyone explain why ??
Thanks