I wanna run a HR202 moisture sensor and an Arduino. Yes, I picked a HR202 to challenge myself to make it work. I already have some easier-to-use SHT40 in stock.
This sensor can only run with AC 1.5Vpeak max. So, I've created this little circuit to provide AC, and I'll only read it when the oscillator output is HIGH, so I can read it briefly at the same time with the help of Arduino's ADC. Could this circuit work? Thank you.
Thank you. I'll try this approach!