"GregS" wrote in message
...
In article VZm0i.38249$KN6.1602@edtnps89, "Dave"
wrote:

Seems like some cheap scopes came with a component tester. probably about
the same. Reminded me I somehow aquired a commercial unit, so i am looking
at it, never used it.
It has a 555 oscillator and some circuitry, but I don'r have a schematic.
Can't find
it on the web but will look some more. i should use this usefull tool.

greg

If the circuit is anything like the one in the link bz posted, it's a few
resistors and a transformer, shouldn't be hard to figure out schematic.