Interfacing (DSI, CSI, I2C, etc.) • Re: arduino kills rasbperry usb ports

The sensor I use is Pepperl+Fuchs NBB0,8-5GM25-E2 – 053491.

I'm very sorry for my earlier mistakes, but P2 and sensor's signal is 12V not 24V and it goes through a voltage divider to Arduino (20kOhm and 10kOhm) so ~4V comes to Arduino.

As for the isolation question — I’m not sure how to answer that.

LED driver is a DL-75W-V108A-MXG, and its outputs simply go into the board via JST connectors.
Sensor power supply is a standard switching power supply, also connected directly to the board through JST connectors.
LEDs: 2 x 30–35V, 1.05A connected in series.
MOSFET: IRF3415.
Raspberry Pi is powered by official 27W power supply.

The only devices connected to the Raspberry Pi are Arduino, official HQ camera, monitor.

My initial suspicion is that you have a high surge current on the flash which with inadequate ground wiring or isolation can create a significant pulse on the ground line.

You might be right — a surge current is likely, since the flash in my setup is probably working that way with my LED driver. LED drivers aren’t great for strobe use, which is why I’m currently working on a current source for my LEDs — though that’s a side project for now. So maybe I should speed it up

Please tell me what exactly do you mean by “inadequate” in this context?

Statistics: Posted by bubik — Wed May 14, 2025 8:18 pm

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