LET device?

Dave_H

Well-known member
Joined
Nov 3, 2009
Messages
589
Location
Ottawa Ont. Canada
Has anyone heard of, or seen, an obscure device called Light Emitting Triac (LET)? I believe it was
an early attempt to combine power control with lighting in single device; possibly GE? It may have
been late 1980's to early 1990's.

Dave
 

Dave_H

Well-known member
Joined
Nov 3, 2009
Messages
589
Location
Ottawa Ont. Canada
LET there be light! No such device! If so it would have had to be introduced on April 1st.

GBGL! (Great Big Guffawing Laugh)

A friend who is a power engineer commented that almost anything will light up if you pass enough current through it.

This was inspired by an obscure but real device, the light-activated SCR (LASCR); SCR's being inherently light-sensitive. The small device I played with way back was packaged in a clear TO-92 with a concave lens formed into the rounded back, focusing on the die. Light-activated triac (LAT?) also makes sense.


Dave
 
Last edited:

Katherine Alicia

Well-known member
Joined
May 15, 2020
Messages
841
Location
Central UK.
A friend who is a power engineer commented that almost anything will light up if you pass enough current through it.

magicsmoke-1.jpg


Gotta love that magic Smoke! :D
 

Dave_H

Well-known member
Joined
Nov 3, 2009
Messages
589
Location
Ottawa Ont. Canada
I was thinking to include reference to the predecessor of the SCR, the Germanium Controlled Rectifier (GCR)
but not being lighting-related it would have been OT and would raise suspicion...

Dave
 
Top