Homebrewing beer, which has a slim to none chance of me monetizing, but it does save some money on on buying beer (finally...after ~4 years, I'm past the break-

Homebrewing beer, which has a slim to none chance of me monetizing, but it does save some money on on buying beer (finally...after ~4 years, I'm past the break-even point of equipment purchases) and it's a fun biological science endeavor that you get to drink the results of. I toy with Arduino and electronics a bit, but my circuits knowledge is sufficiently lacking that it's mostly learning/exploration and not very practical. I can build anything that comes as a kit, but designing anything from scratch is more difficult.