irdc

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[–] [email protected] 6 points 1 year ago

“Clearly these numbers have a ritual purpose”

[–] [email protected] 8 points 1 year ago

Volgens mij valt dit onder iets wat de staat mag reguleren vanuit haar zorgplicht onder artikel 22 lid 2 van de Grondwet?

[–] [email protected] 1 points 1 year ago (1 children)

Ja, maar dan zou ik toch beginnen bij het beperken van het koningshuis, met volledige afschaffing (of ceremonieel maken) als einddoel.

Dan ben je niet eerlijk over waar je naar toe wilt. Water bij de wijn doen daar zijn de coalitie-onderhandelingen voor.

Ik zie er het voordeel niet van in om een ceremonieel figuur te verkiezen.

Je hebt gelijk, een ceremonieel president moet je niet direct verkiezen; die heeft immers geen mandaat dus kan nooit verkiezingsbeloften doen. Beter kiest de 2de kamer (of de 1ste en 2de kamer samen?) het staatshoofd.

[–] [email protected] 0 points 1 year ago (3 children)

Als zelfs de linkse stemmers maar 52% voor zijn, gaat dit toch nooit de tweederde meerderheid nodig voor het wijzigen van de grondwet halen?

Je moet ergens beginnen. Als stemmers niet weten waar een partij voor staat dan weten ze natuurlijk ook niet waar ze aan toe zijn als ze er op stemmen.

Persoonlijk heb ik eerlijk gezegd liever gewoon een stabiel staatshoofd dat niet zoveel doet behalve staatsbezoekjes dan een kermis waar de FvD/BBB/VVD vechten om presidentschap.

PvdA/GL staat dan ook geen presidentiële republiek voor.

[–] [email protected] 3 points 1 year ago (3 children)

Kinda looks like an impedance mismatch.

[–] [email protected] 3 points 1 year ago

I liked the concepts in Sword and Mercy though. The various species and their oddities and taboos, the technology, the characters. It’s just that somehow you can feel that Leckie didn’t have as much of a clear goal in mind where the story was going.

[–] [email protected] 4 points 1 year ago (4 children)

I’ve read them too. I thoroughly enjoyed Justice, but had trouble finishing Mercy because it just failed to engage me.

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

Secondly at least AC alternates, giving your muscles a break and possibly a chance to let go of the wire, DC isn't that forgiving.

Interesting. Your comment made me read up on all of this. Note that, since V~rms~ = 1 ÷ √2 × V~peak~, 230VAC has a V~peak~ of 325V, so in that respect, it should be pretty much equivalent to 300VDC. I figured that the ability for AC to induce heart fibrillations was the most dangerous factor in all of this, but I hadn't figured in that DC induces tetanus and can also temporarily stop the heart.

It's not the volts that kill you though, it's the amps (the volts just make it easier). I found a table listing the effects of various amperages. It does present DC as generally more safe when compared against 60Hz AC, but I'm not sure how that generalises to the 50Hz AC we have here. I do conclude however that I should be limiting the output current to something something generally safe, like 20mA (which should be fine for a voltage reference). I'm thinking a PTC at the input and being conservative wrt capacitor sizing should do it.

Some of my co-students in university made an EKG apparatus. Our lecturer demanded that anything connected to the electrodes was to be powered by a single battery.

TBH, when it comes to an EKG apparatus I'd also be worried about common mode across the chest, or the power supply having a disastrous failure mode.

I prefer my Sn60Pb40 (...) The first couple of lead free solder brands I got just didn't flow right.

Yeah, those were horrid. Even the supposedly excellent SAC305 gave me dull joints (tough it flowed adequately). Still, I can only recommend Sn100Ni+ (supposedly closely related to SN100C): flows well and gives me the shiny joints I crave. Having a good soldering iron (I'm using a Pinecil) helps with solderability.

I do however still have some rosin core Sn60Pb40 for reworking vintage electronics. And I do agree that it's just better when it comes to wetting ability. The peace of mind when working with lead-free solder really is worth it though, especially with pets or small children.

[–] [email protected] 1 points 1 year ago (2 children)

my anxiety level is exponentially correlated to the working DC voltage and at 300VDC I'm definitely well in the thick rubbergloves territory.

Having been walloped by 230VAC, which is far more dangerous, I’m not too worried.

Looking at the schematic you linked above, the amperage is going to be low, which is reassuring. As a safety measure, I’m looking into running the thing off of a battery, so that if the worst comes to pass it simply won’t have the power to be dangerous (1A at 12V translates to a mere 40mA at 300V).

I’d be far more worried about using lead solder TBH (love my Sn100Ni+).

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago) (4 children)

have you contacted a calibration lab? (...) There's one in the Netherlands https://www.minerva-calibration.com/calibration-service/

Their pricing for calibrating a device starts at around €400, which is rather more than I paid for this thing and way more expensive than building my own calibrator. So I guess I'll have to do that...

(...) I have found an article explaining the build of the sources you need

Thank you! Not having to invent everything from scratch is going to make this a lot easier.

[–] [email protected] 1 points 1 year ago

The device is supposedly a 6½ digit DMM yet I currently don’t even trust the first few digits when comparing it to a 3½ digit handheld Brymen DMM. Being reasonably sure that it’s at least more accurate than the Brymen would be nice, so 3½ digits.

I’ve got another desktop DMM, a 5½ digit GW Instek GDM-8255A, on the way, so I could conceivably just use that one as my local “standard” to calibrate against.

The problem however is that the Philips requires a large amount of references to calibrate against (just calibrating DC voltage requires 0V, 3V, 30V and 300V references). Building all references to recalibrate the whole thing would be rather involved, so I was trying to find an easier way.

[–] [email protected] 14 points 1 year ago (3 children)

Seeing as they melt the stuff, I’m not sure the grains need to be rounded.

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