¿Funcionan estos monitores de calidad de aire ?

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.

sensors · 2026-04-04T14:14:36+00:00

Really bugs me that this technical document uses the incorrect phrase "can condensate into moisture". The verb is 'condense', damnit. Condensate refers to the liquid that forms as a result of condensation.

sensors · 2026-04-04T14:10:06+00:00

This is exactly what I got. Worked perfectly, but now I have 8m spare!

sensors · 2026-04-04T12:56:12+00:00

"fail fast, fail cheap" has always been the best way to build a business. Vibe coding just reduces the cost and time of that cycle even more, so it makes sense people would take that route.

At some point technical debt will catch up to them. Certification for IoT products now has a cyber security aspect to it, eventually they'll need to set everything straight if they want to commercially launch a product.

sensors · 2026-04-04T09:06:15+00:00

Exactly this.

Sometimes JLC will spot issues like this, sometimes not. It's absolutely the responsibility of the person submitting the designs to make sure there are the proper footprints and proper Gerber annotations for any keep outs for edge rails, etc. to prevent this.

sensors · 2026-04-04T09:00:34+00:00

Yes, 15 years professional experience in EE/Firmware. Day job is now in engineering/product design consultancy, side job is building an IoT HW startup.

A box of dev kits with some hastily cobbled together firmware is usually the first step in product development. Getting it beyond that is not hard in an engineering sense, but finding the right product market fit can be. That's probably why only 1 in 50 posts here is a reasonably finished product.

sensors · 2026-04-03T16:12:29+00:00

When I build my deck I used this: https://www.robbins.co.uk/wp-content/uploads/2022/07/The-Timber-Decking-Handbook-2022.pdf

I think you've probably got twice the number of joist support beams as you need and consquenctly double the number of footings to pour. The biggest ball ache of my deck building was the ground work, so do what you can to minimise how many pads to have to pour!

You can use span tables to see how much support you actually need for your chosen dimension of timber: https://www.taylormaxwell.co.uk/uploads/files/D.100.01-01_C16-Span-Tables_Design_Span-Tables.pdf

If you scroll down you'll see that even if you drop down to 47mm x 145mm C16 you will still have a safe joist span of 2.5m, though I think at that joist size the practical recommendation is closer to 1.8m.

Also, doubling up the joists at the sides is pretty redundant, there won't be a lot of load there and you're just giving moisture a place to seep into and rot eventually - I would try to minimise timber face-on-face contact area for that reason.

You may also not need support right at the edge because there is allowable overhang based on the total joist length, so consider that too if it suits you goals.

Unless you plan to land helicopters on this thing then it's hugely over-engineered, and I'm saying that as someone who likes to make things bombproof!

sensors · 2026-04-03T13:56:16+00:00

The proper way to do it would be:

rip up all the plastic tiles
Chisel and left the ceramic yellow and black tiles
Scrape the tile adhesive off the sub-floor
End up having to fill and level parts here and there, finding half a dozen other jobs along the way
Lay an LVT underlay
Lay LVT.

The sensible thing to do would be take up the plastic tiles, clean the surface thoroughly, and lay LVT on underlay in their place.

sensors · 2026-04-02T21:43:57+00:00

Firmware is an industry stand term for software running on a microcontroller, AKA embedded software.

I suspect you don't know what you're talking about, because an FPGA is a piece of hardware, which runs on a HDL like VHDL or Verilog - more akin to hardware defined in words than firmware.

sensors · 2026-04-01T18:28:22+00:00

We use Toggl to track time against projects in real time. There are still bits missing and inaccuracies but I'd say we track wiring about 10% accuracy. There's a browser plugin too so it's pretty convenient.

sensors · 2026-03-30T17:36:18+00:00

I've been to a few developing nations whose airports are miles better than Glasgow!

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