I Spent My Sabbatical Building a Power Meter for Sledgehammers

I spent the last month building a power meter for sledgehammer strikes: a pad you hit that tells you how hard you hit it, and whether you can do it again tomorrow. This is the founder story: what I built, why I chose it, and what a month of hardware taught me. The engineering writeup will come later, once I've talked to someone who actually understands IP strategy. For now, the public home for the project is https://intensity.systems/ — sign up there if you want to follow along. Why I used my...