Hi.. I tried to build a basic circuit which uses a transistor as a switch to turn an LED on or off.
I tried several transistors thinking the first one was broken but I always get the same result..
The LED stays ON even when I disconnect the base. The supply voltage is +9 volts.
The emitter was connected to ground and collector to +9 volts. The base was connected to a voltage divider which produced 4.5 V (9/2 = 4.5).
What could the problem be?
I tried several transistors thinking the first one was broken but I always get the same result..
The LED stays ON even when I disconnect the base. The supply voltage is +9 volts.
The emitter was connected to ground and collector to +9 volts. The base was connected to a voltage divider which produced 4.5 V (9/2 = 4.5).
What could the problem be?