Imagesource: https://thelast19digitsofpi.github.io/

Okay, I can piece together a half adder from a few logic gates in LogiSim from memory. A full adder is still within reach. And with a little bit of XOR, subtraction is also attainable, but for everything beyond that...

Low-level hardware design is as fascinating as it is challenging. Implementing multiplication, division, and other mathematical operations in hardware is a task that you either faced for the last time at university, or, if you decided to live off ASIC design, it's your daily bread.

But how about refreshing your knowledge in this area, just like that, and for free?

Croix Gyurek, publishing code as thelast19digitsofpi, has done a good chunk of the work for us and thankfully documented it sufficiently. In his three-part series Hardware Explorations, admittedly, there's a lot to learn. The examples are mostly interactive, calling for a hot beverage of your choice and a cozy armchair.

Enjoy!