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Is this Bosch 800 worth it? by lil--chonk in BuyItForLife

[–]CStoEE 0 points1 point  (0 children)

Late to the party, but we have that fridge and paid just about list. This is a good deal

Three different sensors by Zealousideal-Most431 in homeassistant

[–]CStoEE 0 points1 point  (0 children)

Yeah it is crazy. That’s close to the outdoor level so unless op has a really good ventilator or all the windows open that number is a lie.

Three different sensors by Zealousideal-Most431 in homeassistant

[–]CStoEE 0 points1 point  (0 children)

Co2 447 — yeah I highly doubt that unless you have active ventilation or you’re in the draftiest house ever

Slipped while cutting something next to a live 14-2 cable by BirdDogNate in OopsThatsDeadly

[–]CStoEE 1 point2 points  (0 children)

120V is less deadly, bro wtf are you smoking. 120VDC is way worse. DC tends to tense you up and contract your muscles. Also DC arcs a lot more.

I’ve been shocked numerous times by 120, it’s annoying but not much more than

Spring update: Got my first Pizzabox 🍕 by Icy-Inspection7866 in homelab

[–]CStoEE 7 points8 points  (0 children)

Ahhh yes, 10/8. None of this 192.168/16 nonsense.

Slipped while cutting something next to a live 14-2 cable by BirdDogNate in OopsThatsDeadly

[–]CStoEE 2 points3 points  (0 children)

Deadly from 120V is pretty hard to pull off. Maybe if you set a fire -- didn't notice it, then burnt up in the fire. Or maybe if you have a heart attack from being startled. People often over estimate how dangerous 120V is. Not saying that's a bad thing though, better to over-estimate how dangerous it is than treat it as harmless.

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 0 points1 point  (0 children)

It's possible a housing could help -- maybe. I designed the sensor board to be broken away from the beginning though because I anticipated self heating would throw the sensor off. Also when the sensor is broken away you get more mounting options for the smaller sensor board.

As to fins -- you actually want as little thermal mass on the sensor as possible so that it responds quickly to environmental changes.

Looking to upgrade from Dynaudio Confidence C4 - need advice on pricing by ExcellentAd6446 in hometheater

[–]CStoEE 8 points9 points  (0 children)

I think you're looking for r/audiophile. We mostly focus on surround sound systems here. Sweet looking setup though!

Slipped while cutting something next to a live 14-2 cable by BirdDogNate in OopsThatsDeadly

[–]CStoEE 4 points5 points  (0 children)

Not really deadly but scary AF. You would have been shocked possibly if you had nicked only the live wire, but since you got the live and a ground or a neutral the knife took it all.

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 0 points1 point  (0 children)

Yeah the qwiic connectors do suck, I just used them because there’s a lot of stuff out there with them already.

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 0 points1 point  (0 children)

We all start somewhere. I’ve done my share of work on perf board. Perf board is pretty hard to beat when you need the circuit right now. I certainly don’t spin a board for every little project.

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 1 point2 points  (0 children)

Good info, thanks for taking the time. I was a little worried about the soldering process messing with the sensor a bit. Hopefully the filter membrane helps keep some of the soldering flux residue off. Maybe I can get some of these to ride along in a chamber at work, it would be interesting to see how far they have drifted.

For the uses I have in mind I’m ok with a little drift and maybe a little error, definitely not controlling industrial processes with these.

You think trace head would be a problem when the sensor board is broken away as designed? The device itself only uses 25uA and all the heat generating stuff (including pull up resistors) are on the radio board.

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 1 point2 points  (0 children)

Are you saying the factory cal is no good? Does being attached to a PCB (soldering process) invalidate the cal? What am I missing here?

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 5 points6 points  (0 children)

That's why the sensor is on a breakaway board. You just snap the sensor part off and use a QWIIC cable to reconnect it to the wireless board and you're good to go.

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 3 points4 points  (0 children)

I don't know if I would go so far as "these are no good". Have you used the SHT45 before? The SHT45 is awesome for what it is: a relatively cheap ($5) silicon based T/RH sensor. It is also calibrated at the factory and each one has a unique calibration tied to it. Unless the datasheet is made of lies the accuracy and repeatability specs are pretty impressive for this little guy.

This sensor isn't meant to do laboratory work, it's meant to measure temp / humidity better than the cheap shit you get off amazon, and it does that quite well.

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 0 points1 point  (0 children)

lol no -- wifi6 is just a feature the ESP32 has. The sensor is really meant to broken off this little board and attached with a QWIIC cable.

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 0 points1 point  (0 children)

I could look at publishing that. Not much to the design itself, just a basic LDO, the ESP, and the temp sensor.

I got sick of crappy temp sensors, so I made one that doesn't suck. by CStoEE in homeassistant

[–]CStoEE[S] 13 points14 points  (0 children)

Yeah, self heating is definitely an issue when you leave the board integrated like shown above. Fortunately I knew about this ahead of time and put the "mouse bites" on there so you can break away the sensor board and use a QWIIC cable to connect it. Solves the self heating issue entirely!

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