Scientific applications
This is the most suitable to write blog posts that cover research and scientific instruments. Of course we always talk of accomplishments by Maker, on a budget. Although, in some cases, touching topics of great science, and with good results.
To deepen these topics please consult also the site Physics Open Lab
All the theremino apps are “portable”, they not require installation. You unzip them in some folder and start the exe file.
To use our applications you need a PC with a true Windows 10. I think that our applications will not work on the special, IOT reduced, Windows 10 of the Raspberry. So I suggest tu use a Z85 mini PC instead.
Dear, for the request that I have to make, I don't know if this is the right part of the blog. Eventually move it where you see fit. I just wanted to ask you if you have any experience with any CO2 sensors. And if so, what could you advise me. Thank you
The blog part is quite right. And I also have very good news about CO2 sensors, we have good experience on gas sensors.
Initially for the CO2 we tested the MQ135 which says in the characteristics: NH3,NOx, alcohol, Benzene, smoke,CO2 ,etc
But the MQ135 doesn't work, when you add CO2 its signal decreases instead of increasing. It is also much more sensitive to any other gas than to CO2, so you don't measure CO2 at all. As also confirmed by this article:
https://emariete.com/en/meter-co2-sensor-mq-135/
Then we tried other similar ones but none of them work. And finally we realized that for CO2 we need NDIR sensors:
https://en.wikipedia.org/wiki/Nondispersive_infrared_sensor
Fortunately, there are inexpensive ones, they are called WINSEN MH-Z19B, start buying two or three (better to have at least two because like all these “so” cheap it happens every now and then to find one that doesn't work).
Then when it is time to connect them contact us again that we can also give you the firmware we made for Arduino (so you will also need an Arduino Nano, and possibly with CH340 that are better)
Finally, we can also give you software to run on your PC to see the variations graphically.
Ok. As soon as I have any, I will contact you. Just out of curiosity (if it's not too complicated to explain): why you need Arduino Nano and not the Master? Thank you
The Master can read any type of analog sensor but cannot communicate with digital sensors unless the firmware is reprogrammed and then the HAL application is modified to accept the data of that sensor as well. Doing all this would require weeks of work for us who know him well and maybe a few months for those who don't know him.
Plus there are hundreds of digital sensors, all different, what if we started adding pieces of firmware to the master for each sensor, soon there would be no place in his eeprom memory anymore.
And finally with each modification the Master should change version, become V6, V7 etc.… and then we should post that the master's version has changed, prepare the download for the new firmware and force everyone to buy a PicKit2 to program it.
So in these cases it is better to use an Arduino Nano that is programmed without a programmer. The Nano is definitely inferior to the Master for analog sensors but it is excellent for reading digital sensors. It is connected via USB to the ArduHAL application which is practically identical to the HAL and can also coexist and communicate with the Masters through the Slots, so all the knowledge you have accumulated about our system will remain the same.
The dwarf (with CH340) it is small and inexpensive and also resembles a Master in size, so you will feel like you have another Master connected to the HAL
More information here:
https://www.theremino.com/downloads/foundations#arduhal