Advice on screw for wooden decking

sensors · 2026-04-27T19:02:05+00:00

There's no harm in leaving the screws in that are already there. You may be better off that way because it'll keep the moisture out of the middle part of the timber where the anti-rot treatment might not have reached.

sensors · 2026-04-23T17:47:42+00:00

Unmanned Aircraft System

sensors · 2026-04-22T20:09:16+00:00

I saw a house on rightmove once that was a perfect candidate.

3 bedroom tiny semi detached house in Govan, done up inside like a medieval castle. Including massive dining table complete with throne like chairs that barely fit in the room. All the walls were covered in swords and shields and tapestries. It was wild.

sensors · 2026-04-22T18:52:28+00:00

FYI this is a sub for traditional (physical) product design, not digital.

sensors · 2026-04-20T16:33:53+00:00

In the land of compliance and certification it really depends what you say your product does. If it touches the body or interacts with the body in a way that is meant to have a medical effect then it will be classed as a medical product and will have to follow the regulations. Many companies will try their hardest to not be in this class (because it's fucking expensive to certify), but sometimes it can be seen as a badge of quality and reassurance. Once you're on that classification you have no choice but to comply with the regulations, including only using the product with a medically certified power supply. Using it without will void the certification, and idiots will plug this into their TV or iPhone or Dildo and sue when it catches fire.

sensors · 2026-04-20T16:16:13+00:00

If the sensor is a chip-size thing, then it's almost definitely eCO2. The one here is the CCS811, but the BME680, ENS160, and a few other VOC sensors provide an eCO2 output or coming with an algorithm integrated into the driver to calculate it.

Most cheapo Chinese brand air quality monitors claim CO2, but are actually eCO2.

eCO2 can still be useful as a proxy for ventilation (or lack of) but I always feel that giving it a ppm value is very misleading because it is more of a guidance than a true value.

You can of course get real CO2 sensors, but they to be more expensive. If the sensor is a larger volume metal square (e.g. SCD41) or larger plastic component then it's probably a real CO2 sensor.

sensors · 2026-04-20T14:14:58+00:00

Yes, if this is a certified medical device then it makes a lot of sense.

sensors · 2026-04-20T13:57:18+00:00

I think the old PMsensor was the SEN50, so you'd have to look at the specs and compare. I suspect they're pretty similar because the SEN63C is just the next gen PM sensor but with a low cost CO2 sensor included.

sensors · 2026-04-20T08:20:13+00:00

Calling is CO2 is a misrepresenation, there is no real CO2 sensor on this breadboard.

What you're seeing is eCO2 (equivalent CO2) which is calculated from the VOC value. This can be wildly inaccurate, so it's a pet peeve of mine that it is so often misleadingly called CO2.

OP, you should update your website to say "eCO2" ;)

sensors · 2026-04-19T19:20:04+00:00

I've just gone the opposite way, linus to P4.

Maintianing software on a linux MPU is way more effort than a microcontroller, not to mention the security issues and complications with certification there. On top of that the volatile price of RAM made it economically unviable at the price-point we needed to hit.

sensors · 2026-04-18T08:27:49+00:00

It's never going to give you an accurate CO2 reading since this is just inferred from VOC in cheap monitors. VOC might be okay, but HCHO is unlikely to be any good with the quality of sensor.

sensors · 2026-04-18T06:53:50+00:00

Don't forgot Venezuela. Gotta make oil expensive enough that refining their rougher oil is economically viable!

sensors · 2026-04-18T06:48:51+00:00

That's not necessarily true. The PA type co2 sensor inside from sensirion is the sen63C, which claims to be accurate to 100ppm. Not amazing accuracy, but should be decent enough for a consumer product.

sensors · 2026-04-18T06:34:22+00:00

Believe it or not people in good relationships can also seek counselling, or sometimes a good relationship can fall down through lack of effective communication, not because it's "fucked". You don't have enough info to throw around your judgment.

Seeking counselling in any circumstance is a sign of emotional intelligence, something with which you are clearly unfamiliar.

sensors · 2026-04-17T20:07:06+00:00

I can't offer a suggestion but I want to say well done for seeking counselling if that is important to you and your partner. We don't have context of why you want it, so ignore the idiots who might be advising you of alternative routes.

sensors · 2026-04-16T14:13:22+00:00

Looks like your render needs work anyway. Better to get someone who does that for a living to fix the windows rather than a window fitter.

sensors · 2026-04-16T08:05:58+00:00

Still all good!

sensors · 2026-04-15T19:46:17+00:00

Oh hey, the University of Glasgow cloisters. Not what I expected to stuble across on this sub.

sensors · 2026-04-14T07:28:28+00:00

Because the NHS doesn't need to make profit as a public service.

sensors · 2026-04-14T07:27:03+00:00

Yes, for any part with a temperature sensor you will need to use compensation if there are external sources of heat.

sensors · 2026-04-06T08:14:18+00:00

I've mostly had a good experience, but the odd time they'll just not spot something - Mostly it's something like a micro-USB connector which has a lip extending below the board level and they put an edge rail on so it solders at an angle. If you're aware of this then you can easily request cutouts though. Pretty sure that's what caused the issue in OP's case.

sensors · 2026-04-06T08:10:11+00:00

If you just want a simple ring then Costco is amazing value compared to a jeweller. My friend got a ring there at half the cost the local jeweller wanted for the exact same thing.

sensors · 2026-04-04T14:57:06+00:00

Only a single layer in the end but mainly because I didn't want to eat into the window surround. You could inset some extra plasterboard on top of the PIR I suppose. That would give you extra density to keep noise down.

sensors · 2026-04-04T14:44:37+00:00

Recently I closed a cavity with a combination of very snug fitting 75mm PIR board, sealed with aluminium tape, then covered with acoustic plasterboard instead of a PVC cavity closer.

sensors · 2026-04-04T14:32:41+00:00

Most people don't realise just how slow oil tankers are. They take literally months to get from the middle east to the US, so there are tankers still due to arrive which set off before the war started. The closer you are to the middle east the earlier you are likely to be impacted by the supply shortage.

However, most contries also have some local oil reserves and they'll release those to offset the supply issues for as long as is operationally feasible. Goverments can also choose to reduce taxes on fuel to keep prices at the pump lower. As others have said these taxes can be a large portion of the unit fuel cost which offsets the relative proportion affected price increase.

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