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(Andrew Gabriel)

In article ,
The Natural Philosopher writes:

Hoew about a unijunction with the LED in its collector?

It would be hard (maybe impossible) to get the on-off ratio
50%. Also, the with the output being saw-tooth rather than
square wave in a conventional unijunction oscillator, the
LED would fade off each time. BTW, there's no 'collector'
in a unijunction transistor -- I presume you mean the drain?

Just to be pedantic its E,B1,B2 on a UJT,Its an electronic switch, no gain
so no collector or drain :-)
It would work, but to be effective would need anther transistor, which
would make the component count as high as an ordinary flip/flop.

--
F-Red