But for some reason, its EBC on this model.
My negative battery lead is ground in my real circuit and it works, but if i switch positive for negative, it doesnt work.In other words, only conventional flow works with this circuit.
Hi,I have built the very simple circuit on my breadboard but am getting weird result.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 happen is, the led stays on even without the arduino plugged in. I measured the voltage across the 10k resistor and it says 3.3volts. It alterates between 3.3v and 6.3v when i plug in arduino.So confused.I though no current would flow if arduino wasnt plugged in but somehow current flows from the 9v battery throught the base, to the arduino and also makes it out of the emitter to ground completing the circuit.Why is this happening?I tried another transistor, this time the BC547 and the same thing happen.When i run this circuit on my simulator, it works when i manually flick the switch on and off.Whats going on?Thanks for any help
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