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[From the last episode: We saw how AC power from the wall can be turned into the DC power that typical IoT devices need.] The last post talked about the first thing we need when bringing power to our devices if we supply that power through the wall: converting AC […]

[From the last episode: We looked at the difference between AC and DC power.] What comes out of our walls is AC power. In North America, it oscillates at 60 Hz (or 60 cycles per second). In Europe it goes at 50 Hz. Here the nominal (meaning, average or target, […]

[From the last episode: We saw that lower power doesn’t always mean lower energy consumption.] We’re going to start winding down our coverage of energy concepts in the IoT by looking at sources of energy. And in order to do that, we have to the two main categories of energy […]

[From the last episode: We saw how frequency has an important impact on power.] We’ve been talking a lot about power, even though what we really care about is energy. To be clear, power is still important – if power is too high, then things can get too hot. So […]

[From the last episode: We looked at the critical role that clocks play in digital circuits.] We’ve seen that clocks help to keep order in digital logic. You’d think that, as a matter of course, you’d want to run them as fast as possible for the fastest speed. Even if […]