As I'm a beginner I was playing with transistors connecting them parallel, serial, making AND/ OR logic gates and so on. I connected all collectors to + and each transistor emitter to another one's base.
The wire of the first base acts a little amazing for me. When I stand up, move my body, touch it, move my hand in the air on top of it, move a paper in the air on top of it, LED turns on and after a while turns off. When I place my finger on it, a coil, sheet of metal, antenna, LED turns and remains on and doesn't turn off after a while. I guess it gets very low electric induction from the environment and makes current in it and with amplification of transistors led with turn on. But the more confusing thing is that when I connect a diode to the wire of first base and place my finger there, it turns on :| while no current should go there. How is it possible? What if instead of 5 transistors, there will be 100 transistors? Can it be used to detect any small movements in a room?
Please test it and I have a movie of it if you wanted I upload it. Thanks