If you want a VERY useful piece of equipment I recommend a hand-held semiconductor analyzer, similar to this one:
https://www.amazon.com/Peak-Atlas-DCA55-Semiconductor-Analyzer/dp/B005NIR8G8
I also have their LCR meter. If you get the tweezers option, you can identify SMT components with no body markings.
**broken link removed**
https://www.amazon.com/Peak-Atlas-DCA55-Semiconductor-Analyzer/dp/B005NIR8G8
I also have their LCR meter. If you get the tweezers option, you can identify SMT components with no body markings.
**broken link removed**