16F726 Capacitive sensing module

[HankMcSpank]

I use the CSMs with great success without having to average.

I basically store away the last cap sense output reading (ie TMR1 count), take the present reading (the TMR1 count again) and just have the program calculate an ongoing 'trigger' threshold count (the threshold being the last TMR1 reading reading minus a certain percentage)

And then just code it along the lines of if the present reading just takenis less than the threshold (ie the last reading minus a preset percentage), then the sensor has been touched....set a flag variable.

There should be a huge amount of difference between the non touched count & the touched count ...I set my threshold at something like 30% and it trigger everytime.

One thing i've found helps greatly with CSM ...is to adjust the CSM oscillator settings & also the sample period so that you get a 'normal' reading in the 10,000->15,000 count ballpark.