Electronics > Beginners
How would you make a heart rate simulator that would plug into an oscilloscope?
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Beamin:

--- Quote from: Rick Law on March 16, 2019, 01:40:18 am ---If the output is all that is important, this looks like an easy job for an Arduino to handle.

One may need a capacitor to smooth the rise/fall, besides that, how the "patient is doing" can easily be programmed in your Arduino - you can make your custom "death scenario" : from a very excited state, to erratic movement, to flat line, then come back with a few random beats, then flat line again... then ... RIP!

I like a random single/double/triple beats after a random 10's of second pause, you know, to keep the relatives hopeful, then quiet...  Just as they begin to count their inheritance, it beats normal again.  Grandpa is back...  You'll have to wait a bit longer for your Gran Torino after all.

--- End quote ---


I find it interesting that about half the people seem to think this needs to be a product or device that does something useful. A lot of my threads have responses like this. It was the opposite , it was so I could learn ways to use analog components to manipulate signals. In other words not cheat and just use an Arduino. Making a flashing LED using code and an Arduino, is NOT learning electronics and not that much fun.  Code can be tedius when you don't know the syntax which is always what gets me at first.
Rick Law:

--- Quote from: Beamin on May 07, 2019, 04:37:46 pm ---
--- Quote from: Rick Law on March 16, 2019, 01:40:18 am ---If the output is all that is important, this looks like an easy job for an Arduino to handle.

One may need a capacitor to smooth the rise/fall, besides that, how the "patient is doing" can easily be programmed in your Arduino - you can make your custom "death scenario" : from a very excited state, to erratic movement, to flat line, then come back with a few random beats, then flat line again... then ... RIP!

I like a random single/double/triple beats after a random 10's of second pause, you know, to keep the relatives hopeful, then quiet...  Just as they begin to count their inheritance, it beats normal again.  Grandpa is back...  You'll have to wait a bit longer for your Gran Torino after all.

--- End quote ---


I find it interesting that about half the people seem to think this needs to be a product or device that does something useful. A lot of my threads have responses like this. It was the opposite , it was so I could learn ways to use analog components to manipulate signals. In other words not cheat and just use an Arduino. Making a flashing LED using code and an Arduino, is NOT learning electronics and not that much fun.  Code can be tedius when you don't know the syntax which is always what gets me at first.

--- End quote ---

Well, Beamin...  Communication is a rat's nest...   I wish you quoted someone else.  As you picked mine, so I feel I should answer...

I did caught your statement"How could you build that using analog parts?" in the OP.  I was not sure you really mean getting fun/education out of building or fun/education out of playing with the resulting gadget.  My suggestion is premised on "if the output is all that is important" - if you are aiming at playing with the resulting gadget producing the simulated heartbeats, that would be a quick way of doing it.

I suppose most of the "missed" replies fall into the same category - unsure about what you are aiming for, took a guess, and missed.


Why I wish you quoted another one: your point is  "I find it interesting that about half the people seem to think this needs to be a product or device that does something useful."  Simulation by MCU or by simulation by analog components are equally useless for real measurement...  So I took a guess in what you mean instead of what you said and wrote this reply accordingly...
rstofer:

--- Quote from: trophosphere on March 09, 2019, 11:19:08 pm ---Here you go: Frank's ECG Simulator

--- End quote ---

There are some RC circuits hanging around the edges smoothing out bumps but that simulator is effectively digital.  The 4521 is a 24 stage frequency divider and the 4017 is a quad and-or-select gate.

A clever implementation.  Even using an Arduino would still require all the RC networks so there isn't much to be gained by using one.

That simulator turns up near the top of a Google search 'ecg simulator diy'


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