Hey everyone! Just registered on the forums to ask for a little guidance. I have a little experience in software development and solder work on automotive circuit boards.
I work in the high performance automotive industry. I'm looking to build a weather station for some of our automotive testing equipment. I need an accurate way to sense humidity, temperature, and barometric pressure. My testing equipment has a 0-5v analog input for each of these sensors. I'm having issues finding cost effective analog sensors and I think I might need an arduino to process the data and output the signal to my testing equipment.
Can this be done with PWM?
TLDR; I need 0-5v analog output for my testing equipment for humidity, temperature, and barometric pressure.
The popular DHT11 or DHT11 temperature/humidity sensors will take care of those two. It uses a single-wire interface to transfer binary data (not PWM, sorry).
There are many choices of pressure sensor that use SPI or I2C interfaces.
You could use the PWM but you'd need a discrete circuit to filter the output so the voltage is stable and then you would have to calibrate it because there may be some attenuation of the signal after it comes out the other end so what you think you're outputting may not be 100% accurate.