I was searching for the most simple LED flashing circuit. On a webpage (http://cappels.org/dproj/simplest_LED_flasher/Simplest_LED_Flasher_Circuit.html) I found the following circuit with a transistor and a capacitor.
As I read the description to the circuit, I was wondering, if it would be possible to swap the transistor with a z-diode, because the z-diode also uses the avalanche effect like the transistor in the circuit.
Would the ciruit below work ? And if yes, how would you have to calculate the values for the z-diode and the capacitor ?