The little board to be built in this directory is going to be an addition to
the SIMtrace family: it will be a purely passive adapter, hosting a SIM socket
and a connector for the existing FPC cables from Sysmocom SIMtrace2 kit.  This
passive adapter will allow strictly non-invasive observation with an
oscilloscope, particularly observation of SIM voltages being put out by
different old phones, without any active components that need to be powered,
that may be damaged by 5V phones, or that may alter SIM-ME interface behaviour
through introduction of alien power supplies, pull-ups or shifters.