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

[Ralph Mowery]

I was thinking one of the APPLE inventers but could have been someone else was taking electronics and discovered software could do a lot that hardware was doing and much easier to change.

 

With the way things are now the transceivers are just a couple of globs of ‘plastic’ inside and mostly software now.  I have a transmitter and receiver of what a good ham station would be around  1950 to 1955.  The two of them weigh in around 75 pounds or more each and are about a foot and a half in each direction.  I have an Icom 706 and power supply for it and I doubt they weigh 10 pounds total.  Then here is my smart phone that is no size at all .  Hard telling how big that would be if made of just old type transistors like the 2n2222 and such.

 

Had a car like that at one time.  Now my Toyota I push a button and it starts up and runs from a cold start just as well as on a hot summer day.

 

Ralph

 

 

 

Jim,

 

 I totally understand A, B, and C.

I'll admit many times C seems like overkill.

 

On the other hand software is taking the place of hardware in just about every respect.

Look at cars.

Remember the days when you had to pull the choke out just the right distance,

pump the gas pedal just the right number of times, hit the starter and pray?

 

Today cars start first try summer or winter and we now take that for granted thanks to the CPU.

A, B, and C are all valid choices depending on the application. It just comes down to price and level of effort.

 

-Steve

 

On Sunday, December 12, 2021, 01:54:55 PM EST, 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?



 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20211212/4646a6c9/attachment.html>