[sdiy] flashing LED?? blinking led FLED (are they internally similar to a UJT?)

[loss]

I am building a small motor based "BUG" robot with my son. One of the parts
the project calls for i have never seen before..a flashing led or fLED

The text says that if you use a regular led the motor will not work
properly (it must somehow be using the FLED as a timer which allows current
to flow from the storage capacitors
to the motor. The text gives no further explanation but it does reference
it as a timing element.  Later projects use a hard to obtain part called
the 1381 trigger but i would rather use parts I have on hand.



Obviously I could order an FLED but as the datasheets are very sparse I was
wondering if anyone has any idea internally how these parts work. Where
does the timing mechanism come from?
I was wondering if even though they are a two leg device..that internally
they may have similarities with PUT or UJTS. I have a whole bunch of PUTS
around.

thanks!
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20240611/aa61f8c7/attachment.htm>