Hi,
I also have this SDS011 sensor. I like to power it with a boost buck converter by the Lopy 5V supply (when only a lipo is attached) and switch it with an https://www.mouser.com/ds/2/115/2n7000-1163778.pdf that probably has the capabilities to handle the power consumption (up to 500mA). There is a power enable pin at the pytrack.
The boost buck converter I like to use is https://www.banggood.com/DC-DC-Boost-Buck-Adjustable-Step-Up-Step-Down-Automatic-Converter-XL6009-Module-p-1087346.html
Also I like to communicate with the device (optionally): https://www.banggood.com/5-Pcs-3_3V-5V-TTL-Bi-directional-Logic-Level-Converter-For-Arduino-p-951182.html
For the power enable pin at the pytrack, is that suitable to be used for the switching FET (using a proper resistor)?
At all, this would probably enable attaching more power hungry periferials to the lipo (at least for short time).
What do you think?
Thanks, Lothar