Don't laugh, but is that true. Can you make a basic transistor with 2 diodes? It makes sense, I guess I just never thought about it. I'm gonna try that on my breadboard. I had one of those exact same continuity tetsers but I hacked it apart to make a logic probe. Soon I'll re-hack it to make a better PIC based logic tester. MJ Brush ----- Original Message ----- From: "rixy04" To: Sent: Wednesday, May 19, 2004 8:20 AM Subject: Re: [EE:] Transistor Problem > Here's a simple and quick way of testing transistors and diodes that I have > been using for years: > http://www.pic101.com/transistor_testing.htm > Rick > > Lucian wrote: > > > I have a multimeter with Hfe function, but didn't bother to check them, > > as I looked in the datasheet and I took from there (wrong, because of my > > mistake). But now for the future, I will both check the datasheet and > > measure the transistors, and as for the diodes, double check before > > soldering them :) > > > > Lucian > > > > -----Original Message----- > > From: pic microcontroller discussion list > > [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Jinx > > Sent: 19 mai 2004 14:25 > > To: PICLIST@MITVMA.MIT.EDU > > Subject: Re: [EE:] Transistor Problem > > > > > Thank you for making clear for me this very important issue ! > > > > Haha, you had me wondering there for a minute. "Hmmm, what > > did Lucian see that I missed ?". Now, the tricky bit is when data > > from different sources suggest a choice of two or more pin-outs. > > The base is easy to find. Google for "testing transistors" > > > > eg http://ourworld.compuserve.com/homepages/g_knott/elect56.htm > > > > A multimeter that can measure Hfe is very useful, as a transistor that > > may appear OK resistively may have low gain and not work properly. > > Although one of my meters doesn't guarantee against damage if the > > transistor is incorrectly orientated in the socket, so I don't use that > > one > > on unknowns > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body