how to build a circuit that identifies emitter,collector and base of a bipolar transistor?is it possible? If anybody have idea pls help.

 

hi,
There are lots of transistor testers on the web.
eg: a bit complex but versatile
http://www.google.co.uk/url?sa=t&rc...OqKdZxWiHe46hPw&bvm=bv.62286460,d.ZG4&cad=rja

 

Easy to use an ohm meter for that very purpose.

 

I'm looking for schematic for this.
I love the one I have.

I believe it's little more than a neon, pot, and switches.

It's nice. With a few lead exchanges and switch flips trans is identified. Leads and npn/pnp.

Mine is only slightly nicer.

http://minneapolis.craigslist.org/dak/ele/4352373980.html

 

Do an eBay search for "Sencore Cricket". They made two, the high end one was the Super Cricket but the standard Cricket works great for lead ID. If you don't find anything reasionable save the search so eBay sends you an email when it finds a new listing. I bought my Cricket for $30.00 shipped, sure saves allot of switching probes.

 

how to build a circuit that identifies emitter,collector and base of a bipolar transistor?is it possible? If anybody have idea pls help.

You are already using a device that can identify E, B and C. Simply read the part number from the transistor, type it into google and, PRESTO, a link to a datasheet pops up.