74ls166

• http://forum.arduino.cc/index.php?topic=22117.0
• http://www.mouser.com/ds/2/405/sn74hc166-405774.pdf
• http://softsolder.com/2009/07/18/arduino-hardware-assisted-spi-synchronous-serial-data-io/
• http://pdf.datasheetcatalog.com/datasheet/philips/74HC_HCT166_CNV_2.pdf (fijn)