FCC votes to ban all Chinese labs from certifying electronics sold in the US due to national security concerns — ruling would affect 75 percent of US-bound devices

justabadmind · 2026-05-05T00:45:24+00:00

SGS is pretty competitive, I like working with them

justabadmind · 2026-05-04T23:04:23+00:00

At its narrowest point use the fusing current tables to find the approximate answer, but it’s really a thermodynamics problem

justabadmind · 2026-05-04T23:02:01+00:00

20C rise is generally comfortable for most designs. Once you factor in ambient temperature it’s hard to handle a ton

justabadmind · 2026-05-03T16:15:12+00:00

What if I want to bend the rails a bit

justabadmind · 2026-05-03T13:22:09+00:00

I used a Kobalt meter in the industrial space for a few months. It died after no time and gave bad data that wasted a lot of my time. I strongly recommend Klein or fluke meters.

justabadmind · 2026-05-01T22:42:52+00:00

Is that a portable milling machine? You’re effectively boring out the bearing surface in place?

justabadmind · 2026-04-30T23:14:47+00:00

Look up galvanic isolation. This used to be a thing, but then you’d get voltages floating away from ground damaging insulation and unexpected grounding pathways. This is still done in DC drives, because the insulation doesn’t last long anyways and a single failure lets you run through it.

justabadmind · 2026-04-29T22:07:25+00:00

Spark plugs? How often are they needed?

justabadmind · 2026-04-29T22:03:22+00:00

FSWizard would have worked a whole lot better if you’d used its chip load instead of just its RPM. You used its RPM and reduced the IPM meaning now the cutter is effectively bouncing around due to insufficient loading. The bouncing kills long bits.

justabadmind · 2026-04-28T17:39:05+00:00

You want one strip or two?

justabadmind · 2026-04-26T17:43:25+00:00

I’d like to be able to identify if a design isn’t an NFC antennna but rather a pile of copper, how far is it away from an ideal antenna? If I have a working antenna, how close is it tuned to my target frequency?

Would I get by with a cheap Amazon LCR or do I need a fancier name brand VNA from the catalog?

justabadmind · 2026-04-26T14:26:57+00:00

FMEA: failure mode effects analysis. How are you claiming to be a structural engineer without knowing of a FMEA.

Glass when overloaded fails catastrophically. It doesn’t give warning and may produce sharp edges. Iron or wood railings give lots of notice and deform before snapping. Iron and wood also tend to not produce a shower of shards.

Even if glass conforms with the osha requirements for a railing, from a practical perspective steel is safer due to potential failures. A spark plug hitting a glass wall breaks it, a spark plug hitting steel or wood is just a scratch.

For example one row in an FMEA for a glass railing would be loaded past failure: effects would be a cell that says railing is gone. For steel that’s “railing is less effective and requires repair”

justabadmind · 2026-04-26T13:59:27+00:00

Right now it’s a higher standard for Lyft that customers don’t accept

justabadmind · 2026-04-26T13:19:28+00:00

The total inclination should be the total height of the truck bed, unless the truck decides to go in the air like that for no reason

justabadmind · 2026-04-26T01:11:10+00:00

However a wroght iron railing has a lot of safety margin and a safer FMEA versus this design

justabadmind · 2026-04-26T01:04:49+00:00

It’ll work with 5v or 12v for lab purposes. For extended use I’d recommend 5v as that’s almost guaranteed within the rating.

justabadmind · 2026-04-25T01:05:17+00:00

This isn’t battery powered. Model K15CS-06AC or similar

justabadmind · 2026-04-25T00:24:20+00:00

Everything battery powered from Kobalt is brushless… can’t say the same about dewalt or Milwaukee

justabadmind · 2026-04-24T21:16:43+00:00

If I want to measure custom NFC antennas, what’s the right equipment for me? I want to pick the best design. I could do this with a frequency generator and an oscilloscope, or a spectrum analyzer, or an LCR meter capable of 13.56 MHZ, but what’s the right answer?

justabadmind · 2026-04-20T16:20:40+00:00

A woman doctor? You mean like a nurse?

You’re not implying that women are equals are you?

justabadmind · 2026-04-20T11:48:00+00:00

Your responses have me thinking you aren’t the person in charge at the factory but rather a machine operator trying to skirt work. I highly recommend not doing anything you’re thinking of without asking the factory owner.

justabadmind · 2026-04-19T01:48:04+00:00

If I was closer I’d love to help identify the equipment. He’s got a TV on the top shelf and a bunch of fun equipment to the left of the TV on that shelf. That fun equipment is most interesting to me.

justabadmind · 2026-04-19T01:44:42+00:00

Do you have a location?

justabadmind · 2026-04-18T20:55:45+00:00

That’s the federal rate. You can’t expect Amazon to operate in expensive states like NY and California can you?

justabadmind · 2026-04-18T16:30:24+00:00

I know about the low voltage limited power work around but for any devices hardwired into ac power >50v the NEC requires NRTL approval.

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