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4 questions with no upvoted or accepted answers
1 vote
0 answers
96 views

CAT ratings and DC voltages

I'm a bit lost about the CAT ratings (protection ratings) for oscilloscopes (and multi-meters). There are many tables for which category is needed for which application (for example here or here,) but ...
Sandro's user avatar
  • 7,697
0 votes
1 answer
59 views

"buzzing" sensation from a touch dimmer when touched with wet hand

My house has the above touch dimmers from the late 70's or 80's. They usually give off an imperceptible buzz or no sensation when used. Today I unthinkingly touched one with a wet hand and felt a ...
Jos Dalkin's user avatar
0 votes
1 answer
55 views

Measuring current on 25W incandescent lamp - loud bang/spark from DMM probes?

I was trying to do a power calibration on a Tasmota smart switch, using this procedure: https://tasmota.github.io/docs/Power-Monitoring-Calibration/ I had an 25W incandescent globe (resistive load), ...
user37872's user avatar
  • 283
0 votes
0 answers
409 views

Using a larger fuse in my multimeter

I am trying to replace the burned out fuse in my multimeter. It is very small with dimensions of 3.6mm X 10.25mm and has a rating of 600mA @ 250V. I can't seem to find this fuse. I can find one with ...
user2105725's user avatar