Extreme Amateur. Electronics behind squeezing ?

Discussion in 'General Electronics Chat' started by kennybosss, Mar 30, 2017.

  1. kennybosss

    Thread Starter New Member

    Mar 30, 2017
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    Need to create a device that pulses and squeezes similar to a blood pressure monitor cuff but with controls .. want to know what circuits and material i would require i know nothing about electronics could you please use terms that i could understand .. thanks you :) :):):)
     
  2. AnalogKid

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    Aug 1, 2013
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    What controls? What are you trying to achieve? Do you need to monitor the pressure in the cuff, or just pump it up and down? Also, blood pressure cuffs do not "pulse". The inflate very slowly and deflate even more slowly.

    ak
     
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  3. Dodgydave

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    Jun 22, 2012
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    Well good luck with that, you're going to need a microcontroller to monitor blood pressure accurately,,,,
    no electronics experience means no further progress...
     
  4. kennybosss

    Thread Starter New Member

    Mar 30, 2017
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    Lol I Know even less than i thought i did then o_O its a battery powered device to help regulate breathing though .. squeezing slightly to imply breathe in and contracting to suggest breathe out ... would inflating and deflating be the best way or is there an actually a peripheral to acheive squeezing
     
  5. kennybosss

    Thread Starter New Member

    Mar 30, 2017
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    Thanks analog kid
     
  6. Alec_t

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    Sep 17, 2013
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    What will be squeezed? Chest? Finger? .....?
     
  7. Kermit2

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    Feb 5, 2010
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    Old school

    Super slow gear motor (10 to 20 rpm)

    Crank shaft mechanism to convert rotary motion to a linear motion.

    Attach squeeze device. (Simple image - rope in a loop being closed and released at the speed of the motor)

    Motor control to set speed.
     
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  8. wayneh

    Expert

    Sep 9, 2010
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    Does the cue have to be tactile? An LED bargraph would be simpler to do. Save the squeezing for version 2?
     
  9. Dodgydave

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    Jun 22, 2012
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    If you're thinking of simulating the cuff on a BP monitor, you will need an inflatable tube that is pumped up using a solenoid valve and motor.
     
  10. MrSoftware

    Well-Known Member

    Oct 29, 2013
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    I see this same thing at work all the time. Someone comes in and says, for example, "make me a squeeze machine". The dev guys say great figure out exactly what you want it to do and then talk to us. The customer says "I know exactly what I want, it needs to squeeze stuff, not too hard, but hard enough". So the dev guys start asking questions and suddenly it dawns on the customer that he really doesn't have any idea exactly what he wants because he hasn't thought through the details of exactly what it needs to do yet. Not how it works, but exactly what goal it needs to accomplish. Size limits, does it run on batteries, exactly what is it squeezing and does the pressure need to be monitored, how fast does it need to squeeze, how big of an object will it squeeze, and to what smaller size will it be squeezed, etc.. You can't figure out how to make it, until you know in detail exactly what it is supposed to do. Often times, describing exactly what it needs to do in detail is time consuming and requires much thought, which is why people subconsciously try to skip it. We're all guilty of it at one point or another. ;)
     
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  11. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Is this project for an exercise in electronics, because if just a B.P. M/C is needed, then a decent one can be had for ~$20.00.
    Max.
     
  12. AnalogKid

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    Aug 1, 2013
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    Answers are easy. All of the work is in the question.

    ak
     
  13. djsfantasi

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    Apr 11, 2010
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    Remember guys, his project is not a BP monitor, nor is a BP cuff.

    It is "like" a BP cuff. It is a flat pneumatic tube (hence "like") that is positioned around a person's chest and is rhythmically inflated and deflated.

    So references to making a BP monitor or cuff are well intentioned suggestions, but are probably seen as unhelpful by the TS. I've watched this thread and wanted to clarify this point.
     
  14. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    You need an air bladder and an air pump to inflate the bladder and a valve to release pressure as needed or be able to operate the air pump in reverse to remove air from it..
    A diaphragm pump like this would be something you need to find capable of filling the unknown size bladder with X amount of air in Y amount of time..
    http://www.sensidyne.com/micro-and-miniature-air-pumps/aa-series-micro-air-pump.php
    or
    http://www.ebay.com/itm/DC-3V-7V-5V...6V-90Kpa-Aquarium-blood-monitor-/221661467525
    or many..many more.. trial and error might be easiest for you..
    Any of the cheap-o peristaltic motors on ebay may work too..
    http://www.ebay.com/itm/DC-12V-Dosi...245436?hash=item3cd26ab1bc:g:3zIAAMXQDfdRtMUD

    Very little of the product is electronics..
    Its mostly mechanical aspects...
     
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  15. wayneh

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    Sep 9, 2010
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    How the heck do you know? The TS hasn't said any of that. (I'm not saying you're wrong, only that the details haven't been offered here yet.)
     
  16. djsfantasi

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    Apr 11, 2010
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    See post #4
     
  17. wayneh

    Expert

    Sep 9, 2010
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    It says nothing about a tube around the chest, only something that cues breathing timing, not a physical assist to the diaphragm. I've asked if the cue even needs to be tactile and have no answer yet.
     
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