/diy/ - Do It Yourself

>>1413627
With what Im making multiple buttons can be pressed at once. My sensors are just those traces connected to the touch pins on the teensy. In my first version I just took solid core copper wire and bent them into rectangles with beams filling their centers and connected them directly to the pins but there were issues with touching near one would set off others near it. I wish I had fancier sensors with i2c or spi but from what Ive seen they are expensive if you are buying a lot of them and unfortunately Im on a budget.

>>1413629
I am using the built in touch capable pins and the touchRead function to use them. It is nice because it only requires me to connect a single wire to each 'sensor' (in my case its the traces on that grid from before). I believe this matrix should work and youre right about it using the 8 pins. My main concern is if the traces are too close or something else where they will set off false positives with nearby ones.

I saw pic related when trying to learn about capacitive matrixes and it works by sending a signal on the columns and checking how much it has changed when sensing for it on the rows. Seems like a good idea but I dont know if the teensy lc is capable/powerful enough to generate, detect, and process them fast enough without using other boards or chips.