search

Carleton-SRCL / SPOT

Spacecraft Proximity Operations Testbed
7 stars 19 forks source link

E-stop Doesn't Cut the 12 V Line when GPIO Pins are Connected #50

Open c-bash opened 1 year ago

c-bash commented 1 year ago

The 12V line doesn’t get cut when the GPIO pins are connected to the thruster board. I believe the e-stop drain is getting connected to GND through the Jetson GPIO pins.

c-bash commented 1 year ago

Seems to be solved with the GPIO pulldown resistor going to GND instead of the e-MOSFET drain. BLACK and BLUE have a ~0V potential when e-stop is activated. RED has a floating 0.2-0.4V potential, which is likely a faulty hardware connection somewhere. Should look at the thruster breadboard connections: Are any MOSFETS dead/dying? Is there a short due to wires being too long or being too close? Etc.