[GreenKeys] UART (sort of like) in software on Arduino

[Keith Lueck]

 I guess this is starting to  veer off topic, but Jim's question reminds me of a job interview I had with a machine tool company years ago. They asked me to design a circuit to move a carriage back and forth by reversing the drive motor.  I was later told that one of the reasons that I got the position was because I was one of the few (maybe the only) candidate who's answer didn't involve a microprocessor (I used a couple of relays).. ;-) 
    On Sunday, December 12, 2021, 12:54:59 PM CST, Jim Haynes <jhhaynes at earthlink.net> wrote:  
 
 This is starting to sound like a question I posed (as a joke) to some
current college students.  I need an audio amplifier with a gain of 10.
Should I
  a)  Build a transistor circuit for the purpose?
  b)  Use an op-amp and choose the input and feedback resistors to
      get a gain of 10?
  c)  Use a microcontroller, convert the audio to digital, multiply
      the numbers by 10, and convert back to audio?

The old-fashioned UARTs are out there - somebody on this list recently
said he had a bunch of them.  You can use a 555 timer to make the clock
speed anything you want.  Lots of Irv Hoff articles did exactly this.

Or if you want to be even more primitive you can use a handful of ordinary
logic ICs, as in the WA6JYJ speed converter published in Ham Radio back in
1971.

Now if you want ASCII-to-Baudot conversion and connection to a computer an
all that it's a more complicated story, but sending Baudot to a Teletype
machine should be duck soup.

     ---

     "Ya can argue all ya wanna, but it's dif'rent than it was."
     "No it ain't! No it ain't!  But ya gotta know the territory."
         Meredith Willson, The Music Man
______________________________________________________________
GreenKeys mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:GreenKeys at mailman.qth.net

>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to kwlueck at swbell.net
  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20211212/f27ec9b0/attachment.html>