A simple board that provides an Econet clock and biasing, and a bunch of Econet sockets.
I haven't tested this, but [https://stardot.org.uk/forums/viewtopic.php?f=3&t=15049](lcww1 on Stardot has), and it looks like they work well.
Revision 1 had a bug with the ATTINY85 footprint; it was too narrow, so to solder the chip on, I had to turn it into a J-lead package by bending its legs underneath.
