The $24 or EUR 26 of the two picoprobes doesn't bother me. The exact configuration of the capacitors that caused the probe's demise... I haven't figured out. But one is my PC. Properly grounded. The other reference was the pi, so that was probably powered by a wall adapter similar to the official raspberry pi power supply: Does not have a ground connection.
In that case the best you can do is to connect some capacitors between secondary ground and both line leads. The result is 115V on the GND and broken pico probes. Of course this can be avoided. I suspected this was going on after the first one blew up. So I was extra careful with the second one. Still one wrong move and it is gone.
I prefer debugging with printf anyway: You can "cook" the data before you show it.
In that case the best you can do is to connect some capacitors between secondary ground and both line leads. The result is 115V on the GND and broken pico probes. Of course this can be avoided. I suspected this was going on after the first one blew up. So I was extra careful with the second one. Still one wrong move and it is gone.
I prefer debugging with printf anyway: You can "cook" the data before you show it.
Statistics: Posted by rew — Tue Dec 16, 2025 1:16 pm