I'm looking at this page which shows an easy-enough circuit for a one-wire temperature sensor tied to a parallel port:
A couple of questions:
- Any comments on this circuit? Does anything jump out as a bad idea or does it look good?
- Where would be the best (fastest) place to purchase the DS1820? I live south-west of Melbourne but anywhere 'round town would do, or a good, reputable internet dealer.
- The author of the above webpage suggests that voltage will drop over long distances and possibly a 'power amp' will do. Last time I used a power amp was at a rock concert so I'm guessing he means something else. Suggestions? (I'm hoping to plant about 5 of these around the house at spare network points so there's a fair bit of total distance)
Cheers! Rick Measham