Electronics > Beginners

Q: Identifying Transistor Terminals

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Chasm:

--- Quote from: BoredAtWork on December 30, 2010, 11:09:37 pm ---Build your own http://coremelt.net/files/software/repository-tarballs/semiconductor_tester.tar.gz

--- End quote ---


The DIY version is actually nice. The firmware is not only open but also still gets improved.
It is really cheap, the biggest investment is usually the LCD.

I'm currently working on one myself, trying to cram some more stuff on the board "because I can", ot at the moment rather "because I want" (too much, to fit without a lot of work).

Longhair:
Hero999 - I see where I went wrong by wanting to build a 555 oscillator circuit first. My google searches are coming up with more advanced topics (for my needs at the moment) than what I really want. I took a step back and googled "transducer" and found this video: that helped me understand better what you were talking about in your first reply. Thank you for the additional information. I do not have the parts to put together the two different schematics that you have provided yet. I will put them on my list of things to order because what good is theory without practical experience?

BoredAtWork - I poked around the files of the link after extracting it with WinRAR. The instructions are in German (I think) so it may be a while before I get the time to fully understand everything in there. It does look to be more advanced but that pushes me forward. Thank you for the files.

Zero999:
Great video.

The Joule Thief oscillator works on exactly the same principle. The difference is that feedback is taken via the transformer formed by putting two windings on a ferrite bead.

Chasm:

--- Quote from: Longhair on December 31, 2010, 11:20:47 am ---BoredAtWork - I poked around the files of the link after extracting it with WinRAR. The instructions are in German (I think) so it may be a while before I get the time to fully understand everything in there. It does look to be more advanced but that pushes me forward. Thank you for the files.

--- End quote ---


The project was posted in one if the German electronics forums, mikrocontroller.net, after a while the firmware development moved into the SVN.
There is a long topic about it, some parts of it are in English.
There is also a German language wiki article which describes the principles used. Google translate seems to work more or less.

If you have a specific question about the project, posting without registration is possible at mikrocontroller.net and widely used, even posting in English is encouraged. But better try to read or at least skim through (english parts of) the Thread before posting, or someone will tell you to RTFM. ;)

FreeThinker:

--- Quote from: Chasm on December 31, 2010, 02:06:53 am ---
--- Quote from: BoredAtWork on December 30, 2010, 11:09:37 pm ---Build your own http://coremelt.net/files/software/repository-tarballs/semiconductor_tester.tar.gz

--- End quote ---


The DIY version is actually nice. The firmware is not only open but also still gets improved.
It is really cheap, the biggest investment is usually the LCD.


--- End quote ---
I think Dave has a few of these to get rid of  ;D

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