MCP3008 Archives - K. Stobbe

Analog Noise and RC filter

Posted on January 13, 2019October 13, 2019 by kstobbe

Analog signals transmitted through long wires can pick up a lot of noise – the wire will act as an antenna. High frequency noise can be filtered with a lowpass filter. I’ll design, implement, and test an RC filter. Following the posts about Botanix and Effectively killing a plant the project will use an analog soil moisture…

LM393 Moisture Sensor Experience

Posted on January 13, 2019October 13, 2019 by kstobbe

I was planning to use LM393 Moisture Sensor for a plant watering system. First I build a small scale setup to test the sensor with unfortunate results. I could call this post: Effectively killing a plant Soil moisture is a key measurement in driving the plant watering system, therefore I want to monitor it carefully….