The digital multimeter, DMM, is one of the most common items of test equipment used in the electronics industry today. While there are many other items of test equipment that are available, the multimeter is able to provide excellent readings of the basic measurements of amps, volts and ohms.
Here are the basics of the rules, which will apply to drones weighing fewer than 55 pounds: pilots will have to pass a knowledge test (but not a practical test) to get a newly developed drone operator license and will have to be vetted by the TSA.
Consumer-grade drones are often limited as to how fast and far they can fly and how long they can stay in the air for. Typically, high-end quadcopters like the DJI Phantom 3 Pro Professional can only fly for about 25 minutes and at no more than 50mph. A German company airstier is hoping to overcome some of these restrictions by building a drone powered by a combustion engine, rather than batteries.