PORTLAND, Ore. (KOIN) — The free at-home COVID-19 testing kits sent by the federal government are arriving at local mailboxes. Each kit has two tests inside and come with detailed instructions. Before ...

While using a digital multimeter to diagnose electrical problems on customers’ equipment, I frequently hear the comment, “I’ve got one of those multimeter things, but I never learned how to use it.” ...

Because of its mass, a battery takes a long time to change temperature. If a vehicle sits out all weekend in a zero-degree environment, it might take 30 hours to warm up the battery. Use the outside ...