Hi!
If there air bubbles inside the cylinder the pressure will not be constant with a given weight or will be very suceptible to small movements, which is my problem somewhat. (I filled completly the cylinder jacks with hydraulic oil with a syringe while purging the cylinder with some pliers until I could see no more air bubbles. Then I screwed in / connected the sensor to the cylinder. )
I will try with another battery then, I was reading about using an acid battery like you suggest, I am going to search for some posts on advices on how to use a car battery or acid battery, tomorrow I will post a diagram, I will try to do a more basic prototype with only 1 sensor and an arduino with JACK port (Im using a LoRa 3.3 arduino) without soldering with a breadboard and with different batteries and then I will post a schematic, I am still learning how to draw schematics,
thanks!
switchmode power supply
Daz1712:
Why do you refer to 'will try to bleed the air out of the hydrualic jacks again'. What has this got to do with the sensors?Please post a model or diagram of the unit.
There are other batteries other than the 9v, why not go 12v then you can get a rechargable lead acid or use 2 x 6v lantern batteries in series.
You can run the sensors direct off the battery and your Arduino through the regulator on the Arduino.Daz