| For electronics work a video microscope is the way to go: https://www.aliexpress.us/item/3256803915366071.html I have the 180x, though I mostly use it zoomed out. Perhaps some would prefer the 120x for more working distance. Be sure to get a kit with the light. https://www.aliexpress.com/item/2251832167751376.html (I'm told the stand can be found on ebay with lower shipping cost). For oscilloscopes, Check out the new Rigol DHO800/900 series. They're super compact and USB powered, but basically have the 5000 series features and are 12-bit. The lower bandpass ones are fairly inexpensive and they're hackable to higher bandpasses (craftily, instead of eliminating hackability Rigol has made features like the logic analyzer only exist in higher end models). I'd like to see some inexpensive options for sidechannel analysis, I've tried varrious things with SDRs monitoring shunt resistors and really had any interesting signals blasted out by LDO noise and USB noise. Back when I worked on libsecp256k1 I really wanted to setup a CI rig that ran blind side channel analysis on a commit by commit basis, e.g. by looking at the cross correlation of aligned traces with different secret material, but I wasn't able to get something working. |