Over engineering a greenhouse for fun
For the last few years I’ve had a go to grow various chilli and tomato plants for fun. You can’t grow these cheaper than you can buy them (or I can’t), but it’s fun and unrushable, which is a nice change from day to day tech. Last year I built a timelapse rig that took a photo of the sky every second for an entire year. I’ve not got round to writing it up yet, but I learnt a lot about how to build a reasonably resilient setup using an old laptop and a security camera....