Hardware Contributor

Agreed. Since I don't know, probably the most I can hope for is some kind of generic VOC sensor. Is there is such a thing?

With regards to particular emissions, it looks as though there's a Honeywell unit that's smaller than the others and the seller listing claims that it's fully callibrated: https://www.aliexpress.com/item/PM2-5-sensor-HONEYWELL-HPMA115S0-XXX-laser-pm2-5-air-quality-detection-sensor-module-Super-dust/32829242280.html?spm=2114.10010108.1000013.3.2fc91af7A0JTzC&gps-id=pcDetailBottomMoreThisSeller&scm=1007.13339.90158.0&scm_id=1007.13339.90158.0&scm-url=1007.13339.90158.0&pvid=57ffa5dd-6d44-4d46-ae2c-8133b92ef714

Looking now, the datasheet also says it's fully calibrated, so I guess I believe it: https://www.honeywellscportal.com/honeywell-sensing-hpm-series-particle-sensors-datasheet-32322550-e-en.pdf

Are the alternatives, such as the SDS011 or the PMS2005, fully calibrated? If not, then the Honeywell might have that as an advantage, together with a generally good reputation for quality and durability.

Another good thing, at least from my perspective, is that I can buy it from Digikey or Mouser, without having to wait for a China shipment or run the risk of getting shanghai'd by a Chinese counterfeit.

There are a number of libraries on github for it: https://github.com/search?q=HPMA115S0

PM2.5 sensor HONEYWELL HPMA115S0-XXX laser pm2.5 air quality detection sensor module Super dust dust sensors PMS5003 G5G1G3G7G10

$23.00

Any updates? I'd like to find a VOC sensor that's sensitive to whatever emissions there might be from a 3D printer so that I can be sure to do enough air filtration to (hopefully) eliminate them.

@Johhnywalter i don't think so, it's a transceiver only..and the very few IOs may be used for the serial comm (from datasheet for tx,rx).
imho a rf spi module has faster communication (so, more sw freedom for the rf stack) and "easier" to use, as it doesn't need to have a free serial or deal with softserial.

@itbeyond logs would be great it can be improved. As i wrote above, I had some issues as well but they went away when I upgraded all (and made some other changes as well).

@alowhum said in Next generation dust sensor for MySensors:

After some more research and some reaching out, it seems the PMS7003 is a good fit.

I've ordered one online.

It's available on both eBay and Aliexpress. It's important to get the version with the little wired plug so that you can connect the wires to the Arduino easily.

If anyone has any other thoughts: please share them!

Dos the PMS7003 have the same interface as the PMS5003? The PMS5003 is the one that Adafruit has adopted, and they have a library for it.

That said, there are many github libraries for the SDS011, and it can communicate over serial (or USB if using a common TTL-to-USB converter).

My motivation in getting one of these is to measure particle emissions from my 3D printer. I'll probably build an enclosure for my 3D printer so as to contain these emissions until they can be safely exhausted or filtered.

https://www.aliexpress.com/item/LC-L-C-Power-Filter-2A-LC-Filter-Clear-Tmage-Transmission-FPV-Ripple-Interference-Video-Signal/32861571973.html?spm=2114.10010108.1000014.5.13b6405d5B20aQ&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.13338.108276.0&scm_id=1007.13338.108276.0&scm-url=1007.13338.108276.0&pvid=7209de7e-aa23-4554-b979-7c367eeb1b2b

Looks to be the same as: http://www.readytoflyquads.com/rtf-lc-filter-3amp-2-4s

I'm curious as to what, in addition to being an LC filter, this filter does. It has quite a few components.

I found out that I can buy precision rods and matching linear bearings directly from https://us.misumi-ec.com. Because of the tighter fit, this would, I'm guessing, reduce the deflection on the x-axis.

Looking on Digikey, I see only two LDO's that are self described as ultra-low noise. The one by TI is the more affordable of the two:
https://www.digikey.com/product-detail/en/texas-instruments/LP5907MFX-3.3-NOPB/296-38557-1-ND/5034443

So, I guess, why not? Might as well use that in the future.

Cypress Semiconductor has an interesting energy harvesting chip intended for wireless nodes:
http://www.cypress.com/file/219311/download
The chip looks a little easier to solder than some of them.

The other thing to maybe look at would be the type of inductor used in the OP's diagram. I know from working on the solar power boost converters that not all inductors with the same inductance value behave the same either. In addition, layout can have a big effect as well. In general, you want the parts very close together, and so surface mount parts is the preferred way to go.

I like what the OP has posted so far. It would be great to have a well scrubbed reference design for power supply filtering, with part numbers and probably layout guidance, that we could then just wack into whatever it is that we build with the confidence that we then have guaranteed clean power. Unlike the OP, I do have an oscilliscope, so I would be happy to do testing and post the results if there's first some consensus as to the design.