There are a couple of errors in the article. References to 33W resistors should of course be 33Ω - the symbol font in my Word doc got ignored. And the schematic shows these as 39Ω - which is what I think I eventually used - they give a slightly lower charge rate of 62 - 23 mA.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.