Subj : 555 - love the comments!
To   : Ed Vance
From : Barry Martin
Date : Sat Dec 14 2024 07:04:00


Hi Ed!

 EV> Seeing 555 in the Subject Line made me think about a 555 circuit
 EV> someone helped me do way back in the1970's.
 EV> It was for a audio frequency shift circuit for RTTY.
 EV> I think it had two potentiometers in series to change the Mark or
 EV> Space tone.

Yes: '555' to also immediately reminds me of the very popular timer IC 
-- probably built in to other ICs now rather than as a separate chip.  I
probably have a few in in my Electronics Workbench area in the basement.
Used to do a lot of building and repair.

Here's another memory-invoking part: 2N2222!



                     ¯                                 ®
                      ¯  BarryMartin3@MyMetronet.NET  ®
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