On Mon, May 03, 2010 at 07:20:36PM +1200, Alex Shepherd wrote: > > I'm looking all over for cheap, hobbyist-friendly digital > > input devices but they seem hard to find at a reasonable > > price. Digikey will sell me DS2406's for US$6 but want US$30 > > for shipping to Australia. The only other source I've found > > is on Ebay but he wants US$14 a copy (quite a markup on the > > wholesale of US$2.20 or so) > > I ended up getting all my DS28EA00 (50 units) from http://farnell.com They > were not cheap but did have stock and the delivery cost was way less than > $35US so overall the outcome was ok for me. > > Another alternative might be to go the route of the AVR Mega8/16/88/168 > Firmware Slave device that has been talked about recently. See: > http://github.com/smurfix/owslave
And of course you can simply run a separate wire back for each device and use a port expander such as the pcf8574. Downsides: more wire, no longer able to distinguish broken wire from open switch Upsides: cheap, more electrically robust (?), can source more power for individual devices. Remember a cat5 cable has 8 conductors. njh ------------------------------------------------------------------------------ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
