Hi, I'm Bill. I'm a software developer with a passion for making and electronics. I do a lot of things and here is where I ...

The soil sensor switches half of an etched PCB bowtie antenna in and out of a circuit at a frequency proportional to soil moisture. A carrier signal from a separate transmitter is reflected off ...

Perhaps we should build some of [MakersFunDuck]’s Moisture Duck boards ... A fixed resistor creates a voltage divider with the soil, and dry soil has higher resistance than moist soil.