Independently switching twoloads, such as relays, usually requirestwo microcontroller-I/O ports.Two ports let you control the loads sothat you can switch them both off,switch them both on, or switch ...
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Power Up: Two Valuable Relay Troubleshooting Tricks
Not long after I began contributing to Hagerty eight years ago, I wrote a detailed four-part piece on electrical relays and how they work in cars. You can still find the articles here (Part I: Why We ...
Raspberry Pi enthusiasts searching for a way to control appliances or projects directly from their smartphone may be interested in the PiRelay Raspberry Pi relay shield, which comes complete with a ...
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