We Have Them ... The 30M Raspberry Pi WSPR TX kit
Look here for more information.
Watch the DCC playlist for videos of the 2017 DCC -- YouTube Playlist.
To make it easy to find all the ARRL/TAPR DCC video that HamRadioNow has produced over 100 programs so far! They have created *this YouTube Playlist*.
All the programs are free to watch, and HamRadioNow is viewer supported through voluntary contributions on their web site.