Starting DC motor based on squeeze pressure.

sailorjoe

Joined Jun 4, 2013
363
Is this the variable resistor you are talking about?
http://www.amazon.ca/gp/aw/d/B008DF...e+resistor&dpPl=1&dpID=315n4S2zI3L&ref=plSrch

And which of these dual comparators(if any) will work?

http://www.amazon.ca/gp/aw/s/ref=is_box_hi?k=Dual+comparator
Yes on the resistor, but get the right value. In fact, I recommend you get a 100k and a 10k, so you can experiment. No on the comparator. Look up the comparator by part number, LT319A.

You can use any perf board and cut it to size. The exact size depends on the inside of your handle.

Ronv is right, concentrate on the sensor and understand how it works. If you can't get the kind of effect you want from a pressure sensitive resistor, you might need to switch to something like an air pressure sensor sealed inside a slightly flexible handle.

That first item in your voltmeter search is as good as any to start learning. Maybe you can borrow one to start.
 

Thread Starter

homer2121

Joined Jan 2, 2016
32
Yes on the resistor, but get the right value. In fact, I recommend you get a 100k and a 10k, so you can experiment. No on the comparator. Look up the comparator by part number, LT319A.

You can use any perf board and cut it to size. The exact size depends on the inside of your handle.

Ronv is right, concentrate on the sensor and understand how it works. If you can't get the kind of effect you want from a pressure sensitive resistor, you might need to switch to something like an air pressure sensor sealed inside a slightly flexible handle.

That first item in your voltmeter search is as good as any to start learning. Maybe you can borrow one to start.
Would this be a possible option for a battery? Would save so much space if it was. I see that it is 12v though so not sure what the implications would be.

http://www.energizer.com/specialty-batteries/a23-battery
 

MaxHeadRoom

Joined Jul 18, 2013
22,390
I see that is 55Mah it will depend on your current draw and anticipated use time.
I assume you want to run the motor off that?
Max.
 

Thread Starter

homer2121

Joined Jan 2, 2016
32
I see that is 55Mah it will depend on your current draw and anticipated use time.
I assume you want to run the motor off that?
Max.
Yes for the motor. For the most part the use time will be short bursts at a time. For the battery I want to use the smallest one I can to run prob either 3v or a 6v motor. That 12v battery is a good size given my space constraints.
Would it also be possible to use those small button type batteries?
 

MaxHeadRoom

Joined Jul 18, 2013
22,390
I still think LiPo if you can get them in, they come in various sizes and are 10x the Mah for the same physical size.
Also re-chargeable.
Max.
 
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