[Derek] sent in this electric ball valve he built for his bio-diesel reactor. If you haven’t checked, the commercial versions are pretty expensive. His solution was to mate a salvaged saturn wiper ...

In current designs, the electronics controlling the valve are separate from the valve itself. The correct term to describe the valves is therefore electronically controlled electric valves. Since ...

Piezo elements are electromechanical transducers that convert mechanical forces (pressure, tensile stress or acceleration) into voltages. The inverse piezoelectric effect, precisely the opposite, ...