12v sensors to GPIO Level Converter

This cheap 4 channel module from Ebay might be of interest for simplifying connection of higher voltage sensors and switches (up to 24v) to 5v or 3.3v GPIO logic levels...

http://www.ebay.co.uk/itm/1pcs-Unidirectional-Electronic-Level-Conversion-Module-3-24V-Voltage-new-/381230248421?pt=LH_DefaultDomain_0&hash=item58c317f1e5

Another listing with additional info shows it to actually be an 8 channel device.

http://www.ebay.co.uk/itm/ICSB003A-Unidirectional-Electronic-Level-Conversion-Module-5V-to-3-3V-12V-/161674462561?pt=LH_DefaultDomain_0&hash=item25a48c8561