He’s copied the basic design of a solar pool heater but managed to do it using ... a PID temperature controller or even an Arduino to make it even better… but it sounds like it works quite ...

There are a lot of DIY solar water heater designs out ... from energy savings indoors to making your backyard pool more ...

A recently published video shows a step-by-step guide to heat water from ... in a spiral. A homemade flat tin can, designed to accommodate the spiral, serves as the solar collector.