Home made pressure transducer

[rockets-in-brighton]

People making staging or deployment mechs based around measuring pressure in a vessel might find this of interest. Very simple pressure transducer made using conductive foam of the kind used for packing and transporting integrated circuits, giving a variable resistance with a fairly linear response to changes.

http://www.instructables.com/id/How-to- ... ressure-S/

Should be possible to package this as an air pressure sensor by popping it into a compressible container. Would need some additional circuitry to tune it for the range of pressures required, I suppose.

[Stevo14]

I really like this idea. The mechanism is very "solid-state" in the sense that it has no real moving parts. The circuitry could be as simple as a couple of resistors and a comparator (or a Schmitt trigger if the sensor fluctuates a lot) which you could use to control a small dc motor.

[Spaceman Spiff]

People making staging or deployment mechs based around measuring pressure in a vessel might find this of interest. Very simple pressure transducer made using conductive foam of the kind used for packing and transporting integrated circuits, giving a variable resistance with a fairly linear response to changes.

http://www.instructables.com/id/How-to- ... ressure-S/

Should be possible to package this as an air pressure sensor by popping it into a compressible container. Would need some additional circuitry to tune it for the range of pressures required, I suppose.

Put it inside a balloon or maybe dip it into that rubber you dip tool handles into!

Cool find!

[rockets-in-brighton]

Put it inside a balloon or maybe dip it into that rubber you dip tool handles into!

Plastikote: I think what he was suggesting was a variation on that.

[Tim Chen]

Put it inside a balloon or maybe dip it into that rubber you dip tool handles into!

Plastikote: I think what he was suggesting was a variation on that.

This idea is genius! I think you don't need to make it so it is completely encased. What if you just made a diaphragm out of an inner tube or something and put it over the foam but you put that inside a bottle cap and threaded it onto the open neck at the top of your rocket pressure vessel?

[U.S. Water Rockets1]

People making staging or deployment mechs based around measuring pressure in a vessel might find this of interest. Very simple pressure transducer made using conductive foam of the kind used for packing and transporting integrated circuits, giving a variable resistance with a fairly linear response to changes.

http://www.instructables.com/id/How-to- ... ressure-S/

Should be possible to package this as an air pressure sensor by popping it into a compressible container. Would need some additional circuitry to tune it for the range of pressures required, I suppose.

Great discovery, Steve!

Thanks for putting it out there!