I once had an issue where my noise-cancelling headphones (but not others) would make some static/buzzing sound when connected to my computer but not to my laptop. The problem lasted for months. I don’t know how I eventually found out that the PoE adapter I had on the same socket as my computer was causing the interference. Moving it to a different socket in the same room fixed the issue.
Check if your IKEA chair is compatible with your screen
191–200 of 214 posts
Re: Check if your IKEA chair is compatible with your screen
#192Earlier quoted context omitted.
One stupid little thing I realized after having sometimes been consistently zapped by mybcar door and other times not getting zapped in the same weather and humidity: If I open the door and grasp for the (metal) edge of it before I start sliding out of my seat I will be grounded and consequently not build up charge as I leave the seat.
One of the worst shocks I've received in my life was not accidentally touching one of the prongs of a half-inserted 120v mains plug, but pulling one of my fleece blankets off of the other on my bed, and then getting my shoed foot within 6 inches of my metal bed frame. I almost fell over, grabbed the upper part of the frame with my hand, and received yet another painful shock.
I’ve had more than my fair share of 120v shocks, but the worst shock(s), by far, happened when blowing cellulose insulation into my attic. The 75’ (100’?) hose was a little unwieldy and I wanted more control in filling areas near eaves (small attic, lots of crawling), so I taped a 3’ section of 2” pvc pipe to the end of the hose. Holy hell… continuously, the static would build for a few minutes until it’d discharge through my gloves. First time it happened I pulled my glove off thinking it left a burn. There wasn’t really much I could do the discharge the static when I wasn’t near a vent or flue.
Re: Check if your IKEA chair is compatible with your screen
#193Earlier quoted context omitted.
my favorite story on this is a town in north east usa changed it's traffic lights from energy wasting old fashion lights to new fancy low energy lights. The unexpected result: in winter time these lights did not melt the snow away and the lights were opaque with white snow.
Technology Connections did an episode on this kind of stuff. GE just installs heaters in their streetlights now.
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Re: Check if your IKEA chair is compatible with your screen
#194ESD safety is an important topic, particularly in industries where sensitive electronic components are involved. However, there are many misconceptions surrounding ESD safety, especially when it comes to the use of cardboard and cotton clothing. Cardboard, for example, is often thought of as a safe material for packaging and handling electronic components (motherboard boxes included). However, it can actually generat…
> Cardboard, for example, is often thought of as a safe material for packaging and handling electronic components
And that's why everything comes in anti-ESD bags
Re: Check if your IKEA chair is compatible with your screen
#195Earlier quoted context omitted.
TVS == Transient-voltage-suppression diode? https://en.m.wikipedia.org/wiki/Transient-voltage-suppressio...
Yup, explicit TVS or just diodes doing clamping or whatever. There's a fair bit of protection circuitry around. Often there's series resistors which help a lot, too. Not to mention that all modern CMOS chips have protection structures on the input (though not really as good as you'd like for something that is randomly handled by charged up humans).
Old school sensitive CMOS chips pretty much made the market for "wrist strap" ESD.
Re: Check if your IKEA chair is compatible with your screen
#196you should NOT ground your chair directly, only ground it through a large resistor, 100K or so. (you might want to check that value, it's from memory, I think you want any potential electric "shock" to be down below the 1 milliAmp range) I'd use a ground strap designed for wearing while you handle MOSFET ICs. if you ground your chair directly, it is likely to make YOU be the best circuit to ground when you handle you…
So I should not sit at my desk barefoot?
Re: Check if your IKEA chair is compatible with your screen
#197Earlier quoted context omitted.
The fact that traditional parts makers like Cooler Master are putting out Framework cases and such bodes really well, I reckon. There are few things I've bought that produce the opposite of buyer's remorse, and my Framework is at the top of the list.
As much as it would interest me to learn that Cooler Master designed and created a product out of sheer enthusiasm for a small third-party vendor, it much more likely came about through traditional means. Not long ago, Framework engaged in marketing and promotion campaigns to demonstrate aftermarket uses for their mainboards via direct outreach to popular creators on YouTube and Reddit. I spoke with one of the partic…
Well yeah, didn't mean to imply there to be a secret cult of Framework (though if there was one I'd happily join it). More that it bodes well to see companies like Cooler Master giving Framework the time of day when it comes to these sorts of business deals.
Re: Check if your IKEA chair is compatible with your screen
#198I have this exact chair and I've spent the past three months thinking the cheapo wired mouse I bought I was leaking voltage, or that I had a FUBAR HDMI cable. I cannot tell you how much of a balm this is for my sanity.
same here - didn't realize it was the chair! Too lazy to have tried debugging it.
I also have an Ikea Markus, an height adjustable table by the same brand, Lenovo Thinkpad Extreme Gen5, Lenovo Workstation Dock, and two Dell U2719D UHD Displays. I always blamed Lenovo for the displays randomly turning off and on, as the Laptop also tends to make other not so funny things when being connected to the Lenovo dockingstations, like throttling the CPU or delaying mouse and keyboard input … So glad I seem to have found the culprit reading this, at least for the display issues <3
Re: Check if your IKEA chair is compatible with your screen
#199Earlier quoted context omitted.
This is the greatest thing I've read today. I love when software and the real world have entirely unexpected interactions. And by love, I usually mean hate, especially when I'm the one that has to debug them.
I remember a story about a car that consistently refused to start after a family went to the store to buy vanilla ice cream but it worked fine when they bought chocolate ice cream. (My apologies for any inaccuracies in my recollection of it). They had a manufacturer engineer verify it happened even. Turned out to be an overheating issue. The chocolate ice cream was at the back of the store while the vanilla ice cream…
Snopes said it is a legend?
https://www.snopes.com/fact-check/cone-of-silence/
Re: Check if your IKEA chair is compatible with your screen
#200Had the same issue a while back, had a hell of a time figuring out why one of my screens would flicker or shut off momentarily whenever my girlfriend sat down at her desk (which is next to mine). Even initially figuring out that it was the act of her sitting down that caused it took some time, with a lot of jokes about her telepathically messing with my setup in the meantime. Turns out that the gas piston in her chai…
I had exactly this issue with a chair gas piston and a large tablet display (drawing tablet), which is presumably more sensitive to EM/ES interference than ordinary screens since it's large, not battery-powered, and has both touch and stylus support.