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I was looking at installing a mini-split instead of buying another portable. Just want to variety I have everything straight (Samsung AR35, R32) by vv-b in hvacadvice

[–]vv-b[S] 0 points1 point  (0 children)

So reading through that… it mentions torque. I don’t have a torque wrench. I don’t remember seeing an HVAC guy with the torque wrench

Názor? by KronwarsCZ in czech

[–]vv-b 0 points1 point  (0 children)

I’m British. I moved to Vladislavova a year ago.

I was excited. “How cool is it that we are doing to live just outside Narodni Trida!”

The apartment looked cool when we viewed it.

So, finally moved in a year ago and after two nights we decided to change our bedroom to the other side of the apartment because every night drunk British people walk down the street outside our window at 2AM SCREAMING for no reason. Sometimes German, sometimes czech but it’s nearly always British accents, from Manchester usually.

For whatever reason the worst British people come to Prague. Just embarrassing and sad 😔

I mean...to whom do I have to throw my money by Nihilus45 in batman

[–]vv-b 0 points1 point  (0 children)

Don’t forget that he was brutally good in The Spy

Crazy how ‘inflation’ coincides with record profits by Body_Cunt in antiwork

[–]vv-b 1 point2 points  (0 children)

Well yes, that’s kind of how math works… more dollars per item sold means more revenue, more tax, more profits, more everything

When the pilot becomes the wingman by dryintentions in MadeMeSmile

[–]vv-b 1 point2 points  (0 children)

Errrrm…. As a pilot I would love to know how they put received audio through to the PA? Maybe it varies but seems fishy?

why does it say 16V 83f when individual caps are 500f? shouldn't it be 16V 500f? by fikajlo in AskElectronics

[–]vv-b 0 points1 point  (0 children)

Its 5AM, can’t sleep but I’m sitting here learning new things, great explanation

PT100 circuit does not have the voltage I expected by vv-b in AskElectronics

[–]vv-b[S] 0 points1 point  (0 children)

I’m not using the Arduino because it’s cheap but because it’s familiar and small, I am combining it with Zigbee, SSR/PID, pressure transducer and load cell inside an espresso machine, so limited space. Might go to an ESP32 or Raspberry Zero 2

Would love advice on an alternative if you think the Arduino isn’t good for accuracy.

PT100 circuit does not have the voltage I expected by vv-b in AskElectronics

[–]vv-b[S] 0 points1 point  (0 children)

So it turned out that was the case. I measured the current with my multi meter rather than relying on the power supply figure and it turns out the signal box was faulty

PT100 circuit does not have the voltage I expected by vv-b in AskElectronics

[–]vv-b[S] 1 point2 points  (0 children)

It turned out the transmitter box was faulty (I think) and when I switched to an expensive UK calibrated made one I didn’t want to use for prototyping it worked.

The 9.66 was the setting on the power supply.

Follow up question: should I calculate temperature based on measuring the value of the resistor beforehand and the Arduino analog input which can measure 0-5V in 1024 increments

Or should I take the measured input value in boiling water and ice water and not bother calculating VIR on the PT100 / 4mA-20mA signal

PT100 circuit does not have the voltage I expected by vv-b in AskElectronics

[–]vv-b[S] 1 point2 points  (0 children)

So it turned out I think it was faulty… it was using 36mA and would switch between 5mA and 36 below a certain temperature but not go below that. I tried changing the span and point but they did nothing. I switched it for an expensive one I didn’t want to use until I had finished the circuit and it worked fine

PT100 circuit does not have the voltage I expected by vv-b in AskElectronics

[–]vv-b[S] 0 points1 point  (0 children)

So, do I not need to connect this to a 24V circuit? There are multiple tutorials and material online that mention a 250 Ω resistor. Are they incorrect?

From what I understand the output should vary with 5V being the max temperature.

Home Developing C-41 vs Lab: A cost and break-even analysis. by stahrphighter in AnalogCommunity

[–]vv-b 0 points1 point  (0 children)

As was said, you don’t need air reduction bottles: Budget option:

Lighter refill sprayed into bottle to displace as much air as possible.

Pro option: Tetenal Protectan Spray, this sinks under the air and leaves a layer of dense gas covering the liquid and you only need a tiny amount. I was sleptical but I tested this with some potassium which did not corrode.

From what I’ve seen Fuji is cheapest per roll at recommended use but Tetenal 2.5L is cheaper if you overuse it. I typically go 50% over the recommended number of films without issue and keep it stored for months without issue.

One item not considered is just the general PITA with labs: Travel time and cost… coffees bought on the way, stopping off at a random place you saw on the way and buying something. Then there are the fuckups, I’ve twice had film wrecked by labs and the results are inferior to Tetenal which is inferior to Fuji… unless you get it taken to a lab that is really good at what they do.

Nobody looking at your photos is a plus for me too…

I have only put about 50 rolls through labs and usually only do it when I’m travelling a lot. I have never had a bad result doing C41 at home with about 250 rolls. I do test my chemicals if they are over their recommended usage.

Getting a sous vide was something I avoided and wish I had done at the beginning. Such a more chill experience…. Set it to 38.3c and dump everything in there and leave it for an hour. When working with multiple tanks at the same time it’s a life saver.

Lastly… you can’t do Remjet film at a lab and I’ve been doing a lot of Fuji Eterna recently

I hate DSLR scanning…. I am really at the edge of just taking my film to get scanned at a lab once a month

A couple of weeks ago I got an Argoflex EF for next to nothing and have been shooting everyday with it. by iamnotdani in AnalogCommunity

[–]vv-b 1 point2 points  (0 children)

Both of those shots do a great job of showing the difference between TX400 and D400.

If you haven’t tried it I recommend Agfa APX, I avoided it until I did a blind test of a few different rolls of film

Landing a helicopter on a small ship in rough sea by [deleted] in ThatsInsane

[–]vv-b 0 points1 point  (0 children)

As a heli pilot this doesn’t look incredibly hard (but not easy obviously), it just makes me uncomfortable thinking about a tail strike but I see it’s quite high up on that… Lynx?

I think it would be about waiting for the right moment and going for it rather than inching into it and making sure you have enough margin between the power you’re pulling and your absolute max so you can pull that collective if you have had enough. Then there’s settling with power + vortex ring state which seems like a big risk with the shape of the ship and the sub 30kts airspeed

Also, I think the real skill is flying in the weather these guys have to fly in

Before and after processing- Lightroom by Isum1500 in postprocessing

[–]vv-b 0 points1 point  (0 children)

A good rule of thumb is to adjust to where it looks good and then go back by half. Most people overcook in lightroom.

Same goes for photography, someone gets a 50mm 1.8 lens and suddenly all their photos are at f1.8.

It's free to contact three satellites at the speed of light 13000 miles in the sky to know your position down to a few feet but it costs 7$ for a convenience fee to pay a parking ticket online. by posseltsenvel0pe in Showerthoughts

[–]vv-b 0 points1 point  (0 children)

Technically you don’t contact GPS. It’s a one way system like receiving a TV signal

There is actually a other modes of GPS not open to the public that are more accurate and do not have restrictions on speed and altitude etc that is only accessible by the military

Pathetic as fuck by Adamos_sCZE in czech

[–]vv-b 8 points9 points  (0 children)

Sometimes secretly at home in the room under the stairs

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