TORONTO — tekmar Control Systems has announced the addition of four new switching relay and zone valve control models to their existing line of zone control solutions. tekmar now offers 2-zone pumps, ...

Description: This series of zone controls manages circulators and boilers in residential hydronic heating systems. The non-networked devices control up to six heating zones and can be coupled together ...

Over the years, control relays of various types have been used by the hundreds — even thousands — to control nearly every function in commercial and industrial processes. Today, many of those ...

Schweitzer Engineering Laboratories, Inc. (SEL) has announced wide-area-measurement-based control in a transformer relay for the first time. This enhancement to the SEL-487E Transformer Protection ...

In this quick Arduino tutorial I will explain how you can control a relay using the Arduino Board, one 1K and one 10K resistors, 1 BC547 transistor, one 6V or 12V relay, one 1N4007 diode and a 12V fan ...