Self-fluxing enameled wire is great for more than just a simple keyboard project, too---it scales to microcontroller-scale projects, if you have enough patience

Self-fluxing enameled wire is great for more than just a simple keyboard project, too---it scales to microcontroller-scale projects, if you have enough patience: http://elm-chan.org/docs/wire/wiring_e.html http://elm-chan.org/docs/wire/wiring_e.html It's a good solution if you have some reason (money or time restrictions) that you can't order a PCB. The biggest downside of free-wiring like this though is that you don't have a whole lot of structural rigidity, but the steel that OP uses more than makes up for this.