Hello, I have been messing with a basic circuit,just a LED,transistor and resistor.
I noticed the "problem" when I was removing the base resistor and while I was doing so I accidentally touched the base of transistor with my finger and LED turned On,there was no closed loop since I never touched the ground pin. At first I thought that there was a problem with AC mains and that somehow I was closing the loop with my feet,so I put on my thick rubber boots and tried again but LED turned on again.
Then I though that there was a problem with my PSU so I unplugged it from the socket and run the LED just using capacitor charge and LED turned on again although I never made contact with the ground line.
Holding a diode in hand and touching the base pin with Anode end doesn't turn the transistor on so I must be closing the loop somehow.
So does anyone know what's going on?
I noticed the "problem" when I was removing the base resistor and while I was doing so I accidentally touched the base of transistor with my finger and LED turned On,there was no closed loop since I never touched the ground pin. At first I thought that there was a problem with AC mains and that somehow I was closing the loop with my feet,so I put on my thick rubber boots and tried again but LED turned on again.
Then I though that there was a problem with my PSU so I unplugged it from the socket and run the LED just using capacitor charge and LED turned on again although I never made contact with the ground line.
Holding a diode in hand and touching the base pin with Anode end doesn't turn the transistor on so I must be closing the loop somehow.
So does anyone know what's going on?