I have been using a custom but traditional load cell design with strain gauges to measure force but i recently realised that this can also be done with a load cell designed to use capacitive measurment. I have designed a load cell that will have around 0.3 mm movment between the capacitive sensor and target. From basic experimentation it seems that this will work quite well with the touchRead function with it having great responce and accuracey at very small distances (1mm).
In my use i dont really need the accuracey the strain gauges offer and the main motivation is that i really hate the slow assembly time of strain gauges and im really facinated by the capacitive measurment.
My question is I have seen in another thread people are adding a capacitor to the plate used to transmit, what effect does this have ? In experimenting it seems to definitley make a difference but im unsure how this works or how to calculate its effect. Is there a better method to do this task than the touchRead library?
If any one has any tips on tuning this set up for a smooth signal and good accuracey i would like to hear them.
In my use i dont really need the accuracey the strain gauges offer and the main motivation is that i really hate the slow assembly time of strain gauges and im really facinated by the capacitive measurment.
My question is I have seen in another thread people are adding a capacitor to the plate used to transmit, what effect does this have ? In experimenting it seems to definitley make a difference but im unsure how this works or how to calculate its effect. Is there a better method to do this task than the touchRead library?
If any one has any tips on tuning this set up for a smooth signal and good accuracey i would like to hear them.