Hello, I am interested in using the BBB to monitor a sensor (geophone) at about 200-400sps. I am currently using the Adafruit_BBIO.ADC library to do this in Python. Ultimately, there are two goals for this project, and I would love some input on how to approach this.
1) Time stamp when the input voltage reaches 0.5v - The geohone is generating a sine wave, the stronger the vibration/movement of the geophone, the higher the amplitude/voltage of the signal is produced. I would hope to accurately place a timestamp at the exact moment the voltage crossed that threshold. As far as timing goes, I am using onboard GPS with 1 PPS output and Chrony for sync. 2) I also have a contact closure that I would like to monitor. Right now, I am pushing 1v through the closure, and monitoring the ADC for a voltage change from 0v to 1v, then applying a timestamp. Any thoughts here? I have read about the PRU on the BBB and am wondering if that is what I need to be using to obtain sub millisecond accuracy on my timestamp. Any thoughts here? Thanks! -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/e80104ea-08b1-4f02-8ef5-4b7050183961%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
