Back in July, I had the following conversation with a friend over lunch:

Friend: What’s the most confusing computer science topic you’ve ever encountered? Explain it to me.

Me: Continuations. They’re a way for a program to manipulate its own call stack as if it were data …

Over the first weekend in March I had a bit of free time. I enjoy electronics, so I pulled out an old Snap Circuits kit I had as a kid and started playing around with it. I had the spring-pin connectors in the SC-750 edition, so I started plugging in …

The original Roboraptor had dual power supplies. Two “AA” size batteries supplied 3 volts for the logic circuitry, and four batteries in a separarte circuit provided 6 volts for the motors. My redesign of the Roboraptor is designed to run off of a large single-cell 3.7 volt lithium battery …