I recently bought a couple of these gizmos:  ($19 bucks a pop)

http://www.ebay.com/itm/261527017059?ru=http://www.ebay.com/sch/i.html?%3Cem%3Efrom%3DR40%26_sacat%3D0%26_nkw%3D261527017059%26_rdc%3D1

Stick in a semiconductor/r/l/c/etc,  press the button,  and it tells you what 
it is,  the pinouts,  and relevant parameters.  Works amazingly well.  

They are based on an open-siource design discussed here.  
http://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/

It is well worth reading the documentation:
http://www.avrtester.tode.cz/upload/ttester_en.pdf


A very good example of what some VERY simple circuitry and VERY clever coding 
can do.  The firmware is being constantly upgraded.  The units with the cruder 
character mode LCD are lot more amenable to firmware upgrades than the graphics 
mode LCD ones that I bought.                                         
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