Shielding against inductive interference
Posted: Wed Dec 09, 2020 5:09 am
Hi, I'm a relative beginner, so please bear with me.
PROBLEM: I am experiencing POWERON_RESET when riding and esp powered electric skate board on street, particularly going over manhole covers and other metal utility covers. I think its very possible that some of these covers have a small current through them from poor grounding, or contain switching devices just below.
SETUP: I have a devC v4 board installed in an abs enclosure under the deck. It's connected via two pairs of twisted wires, about 10cm long (rx/tx and 5v/gnd) to a vesc motor controller, which is in turn powered by a 33v pack and runs a small hub motor.
TRIED: made wires short as possible, installed a 440uf, 100uf, 1uf, and 0.1uf caps between Vin and GND. 5k pullup resistor from EN to 3v. (It appears that after installing the caps the reset reason changed to TG1WDT_SYS_RESET under same circumstances)
What should I try?
What type of shielding is most effective in this situation?
What frequency range am I likely dealing with here?
PROBLEM: I am experiencing POWERON_RESET when riding and esp powered electric skate board on street, particularly going over manhole covers and other metal utility covers. I think its very possible that some of these covers have a small current through them from poor grounding, or contain switching devices just below.
SETUP: I have a devC v4 board installed in an abs enclosure under the deck. It's connected via two pairs of twisted wires, about 10cm long (rx/tx and 5v/gnd) to a vesc motor controller, which is in turn powered by a 33v pack and runs a small hub motor.
TRIED: made wires short as possible, installed a 440uf, 100uf, 1uf, and 0.1uf caps between Vin and GND. 5k pullup resistor from EN to 3v. (It appears that after installing the caps the reset reason changed to TG1WDT_SYS_RESET under same circumstances)
What should I try?
What type of shielding is most effective in this situation?
What frequency range am I likely dealing with here?