I am trying to build a huge array of WS2812b's and the wiring is all done. Now, I am in the process of installing it into it's final destination. However, I have read that these WS2812b LEDs are very fragile parts and are destroyed by such voltage transients. So, I have not yet hooked up the LEDs nor the control board to the power supply and have measured the supply without a load and there are huge >20V spikes (see screenshots). The output is supposed to be 5V and is getting stable after less than one second. Is there any way to prevent these spikes from destroying my precious LEDs and the controller? Would an inductor maybe help to prevent these spikes?
This is the supply in question: https://www.ebay.de/itm/Schaltnetzteil-LED-Strip-Netzteil-5-12-24V-AC-to-DC-Power-Supply-Netzadapter-TOP/252712276489?ssPageName=STRK%3AMEBIDX%3AIT&var=551690817312&_trksid=p2057872.m2749.l2649
These screenshots are with DC-coupling and no load:
Here are some screenshots with a 50 Ohm resistive load and DC-coupling:
50 Ohm and AC-coupling (times 10 probe):