ΒΆ Wiegand card reader interface
- It should be possible to use a Schmitt trigger nand gate to parse the DATA0 and DATA1 to output clean clock and data
- http://archive.siliconchip.com.au/cms/A_107882/article.html
- https://docs.tibbo.com/phm/em2000_wie_cd
- wiegand-protocol-format-pr25.pdf
