FNIRSI DSO-510 Handheld Oscilloscope/DDS Signal Generator 2 in 1, Digital Portable Automotive Oscilloscope 2.8 inch TFT, 10MHz Bandwidth, 48MS/s Sampling Rate, Trigger Function Auto/Nomal/Single

Using a oscillation scope would be easier. FNIRSI DSO-510 Handheld... https://www.amazon.com/dp/B0DJX6W58S?ref=ppx_pop_mob_ap_share Some smell is normal though especially when breaking it in. Hard to explain what the smell is but it’s a different smell Using a meter it’s gonna to bounce around and it’s normal since it’s a constant difference in voltage going through