Hi, I have built the very simple circuit on my breadboard but am getting weird result. [image] The 5 volt supply is from the arduino digital output pin 13 and flashes on and off every second like in the blink led tutorial. The other is a 9v battery. The transistor is a BC338. Anyway, what happ…

Can someone please explain this simple NPN circuit?

system January 14, 2013, 2:49am 8

Its very useful.

Its called Yenka and its free