Introduction, notes on header height Before we get on to the build, proper, a bit on the pin headers. In recent builds, I’ve moved to elevating" the pin headers by extending" them. This makes placing pins easier. top mounted with 8mm spacers. The IC on is slightly squeezed, isn’t it? Well, it doesn’t matter in practice, but … pin headers sunk The middle matrix header, sitting flush with the bottom pcb.

Prep. You’ll need the usual. Soldering iron, solder (I use .5mm solder), clippers, kneedle nose pliers (or similar) I need a magnifying glass good light. small screw drivers multimeter? I like em. ready? All parts are labeled on the bottom pcb and parts in the kit are labeled. Start with the resistors and the diode. I usually mount 2 at a time, and alternate with pins from one to the other to keep from heating any part too much.