Pressure Sensor

Rebreathing Red · 23rd August 2007, 00:33

Hello all you home builders, I just found a cheap pressure sensor and figure I'd share this nice little bit of info
here's the link
841-mpx5700ap

***jradomski*** · 23rd August 2007, 01:52

Quote: (Originally Posted by Rebreathing Red)

Hello all you home builders, I just found a cheap pressure sensor and figure I'd share this nice little bit of info
here's the link
841-mpx5700ap

unfortunately that sensor requires ALOT of current for what it does.. the typical current is 7ma at 5vdc and is a constant draw.. Thats 3-5 times more than the max a good lcd display draws (without backlight)..

aren · 23rd August 2007, 19:34

in principle yes, but you do not need to switch on the pressure sensor all the time...
so using a microcontroller, powering the sensor with a digital output line...
and switching the sensor on maybe 50ms before the measurment... + 20ms measurment time... if we consider one measurment per second we can devide the total power consumption by approximately 10...
but attention, the motorola 5700 does not like sea water very miuch... it requires a silicon oil filling... (or you put the sensor in the loop).

best regards from italy!

23rd August 2007, 00:33	#1 (permalink)
Rebreathing Red RBW Member Current Rebreather/s: Home Build Other Rebreather/s: Not Bought Yet Home Build Join Date: Jun 2007 Location: North Carolina Posts: 24	Pressure Sensor Hello all you home builders, I just found a cheap pressure sensor and figure I'd share this nice little bit of info here's the link 841-mpx5700ap
(Offline)

23rd August 2007, 01:52	#2 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Join Date: Mar 2005 Location: "Da" Bronx Posts: 3,113	Re: Pressure Sensor Quote: (Originally Posted by Rebreathing Red) Hello all you home builders, I just found a cheap pressure sensor and figure I'd share this nice little bit of info here's the link 841-mpx5700ap unfortunately that sensor requires ALOT of current for what it does.. the typical current is 7ma at 5vdc and is a constant draw.. Thats 3-5 times more than the max a good lcd display draws (without backlight).. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.
(Offline)

23rd August 2007, 19:34	#3 (permalink)
aren New Member Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Aug 2006 Posts: 6	Re: Pressure Sensor in principle yes, but you do not need to switch on the pressure sensor all the time... so using a microcontroller, powering the sensor with a digital output line... and switching the sensor on maybe 50ms before the measurment... + 20ms measurment time... if we consider one measurment per second we can devide the total power consumption by approximately 10... but attention, the motorola 5700 does not like sea water very miuch... it requires a silicon oil filling... (or you put the sensor in the loop). best regards from italy!
(Offline)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode