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

 

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

 

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

 

Lol I Know even less than i thought i did then 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

 

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

Thanks analog kid

 

What will be squeezed? Chest? Finger? .....?

 

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.

 

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

 

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.

 

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.

 

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.

 

Answers are easy. All of the work is in the question.

ak

 

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.

 

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...

 

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.

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.)

 

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.)

See post #4

 

See post #4

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.