This controller only supports new style card edge connectors only, and it requires the side of the card edge connector to be cut off, and the pins be bent 90 degress.
- https://github.com/purdeaandrei/CompactBeamSpringAdditionalExpansion
- https://github.com/purdeaandrei/SMDModelFController
- https://github.com/purdeaandrei/SMDModelFController/tree/extra_columns
- https://github.com/purdeaandrei/SMD4704KishsaverClassModelFController
- https://github.com/listofoptions/TH-XWhatsIt
This project is based on the Through-hole xwhatsit by listofoptions, which is un turn based on the capsense controllers by XWhatsIt (Tom Wong-Cornall). original liscencure holds, as well as CERN OSH (compatible license).
original implementation of Tom Wong-Cornall's controller documented here
http://downloads.cornall.co/ibm-capsense-usb-web/ibm-capsense-usb.html
Working theory of operation is under the previous link.