Hey all, I'm not the newbiest newb but a bit out of my element here. I have a circuit that takes in AC, rectifies it, filters it, and uses a 1n47733a 5v Zener and a 20k resistor to limit the voltage to 5c. That feeds a Texas Instruments CD4017BE decade counter clock pin. The intent is each time the ac power comes on the rectified regulated dc voltage causes the counter to increment by one. MY current issue is as the voltage comes up across the Zener, around about 2.5v there is a harsh set of oscillations or something from the current-voltage down to zero and back up spiking above the previous voltage, causing the counter chip to count several times as the voltage comes up. I am not exactly sure why this is happening if it is normal, or how exactly to stop it from happening. I have tried a few different values of capacitor across the Zener but for those seam to almost all cap the voltage down to about 2v? that part is even more odd to me than the original issue. I am sure I am missing something simple as I ahve never really built a rectifier circuit or a Zener regulated circuit before so hopefully, someone here can point me in the right direction. I will include a screenshot of that part of my circuit and an image of the issue as I am seeing it on my oscilloscope.