Component tester

 Not that I'm a great electronics builder. But if I build something from used components I really like to know if they are still in good shape. Besides that it is handy to know what is ECB connection from a unknown transistor. I bought a very handy component tester for that at the radio fleamarket but had to build it first. Actually that went so fast I almost forget to make photos for this blogpost. Building of the device went smoothly and no faults at all. I really think this tool can't be missed in a radioshack. It measures ressitors, capacitors including ESR (series resistance), coils (induction), diodes, LED, transisitors, fet, triac etc. Wish I knew this before buying my cheap almost worthless chinese LC meter. This tool is so much better...

A small video below from another homemade component tester, looks different but does the same. Seems to be the same print layout. Actually I think this one looks really nice. I like the blue LCD...