Right now I am using a 555 circuit to generate a 1kHz square oscillation (not displayed below). Generally the reset is pulled down, but through a button I drive a transistor to output the square oscillation when the button is pressed.
I now want to achieve two things:
Instead of activating the signal by setting the reset to Vdd, I want to deactivate the signal by pulling the reset down to ground, when pressing the button. I tried several things but none worked.
I noticed that when I touch the base of the transistor the 555 outputs something ( a strangely distorted 50Hz signal). So it seems to be possible to drive the transistor by a touch plate (plain metal (cu) plate) for example. How can I achieve that the transistor is driven by a Piezoelement or a touch plate?