Member #57306

Member Since: January 7, 2009

Country: United States

  • If I have this right, perhaps it could be more visible in your product listings? With an “also consider” box on each? As I say… IF I have it right: The Thing- DEV BOARD (WRL-13711, where this comment appears) connects to PC for programming via USB cable. The Thing- (“plain”, NOT “Dev Board”, WRL-13231) requires a 3.3V FTDI Basic is required to program it.

  • Besides the smoothing capacitor and serial line protecting resistor… see guide recommended in other post here…. how “big” a power supply do we need for this? (What current should it be rated for?)

  • I read elsewhere that the only connections needed to drive from Arduino are +5v, Gnd and an output with serial data from the Arduino. Is Unicorn happy with a 5v data signal? 3v3? And what power should the psu be capable of? Capacitor, etc? required on power line?

  • If you “drive” the chips from a PC (I’ve used Windows, for years. Others have done 1-Wire stuff from Linux equally long) all the “messy bits” are taken care of for you between an adapter (about $25) and the routines in the free SDK. I programmed for 1-Wire with Delphi for years, and have just (8/16) figured out the small tweak needed to use the SDK with the “free Delphi”, Lazarus. (Which I have been using happily for several years).

    And remember that the 1-Wire family includes many devices. You aren’t limited to temperature sensors. There are digital input and output modules. Analogue input modules, etc.

  • “Signal degradation”?? No… that’s not going to happen… that’s one of the advantages of using a DIGITAL sensor, like the DS18B20.

  • If you purchase a USB adapter to connect 1-Wire devices to a PC (about $25), all sorts of interesting possibilities arise. For your immediate wants, there’s “1-Wire Viewer”, a free utility that comes with the SDK. which gives you a quick, easy way to learn the IDs (64 bit ROM) of all of your 1-Wire chips. With the adapter + Lazarus (the “free Delphi”) you can write programs for logging and displaying data from your 1-Wire chips on a PC. (Lazarus use explained at

  • Multiple DS18B20s… in combination with other 1-Wire chips, or not…. can all be on one long piece of “bell wire”, under the control of a modest Windows PC, with software written (by you) with Lazarus, “the free Delphi”.

    Details (and zip with demo sourcecode) at…

  • An unofficial (user created) tour of the Qduino’s pins is now available…

    … and notes on what is in the library…

  • Consider one “vote” for how you have it in V1.0 being just fine cast, please.

  • Many thanks!!! LOTS of Good Stuff in the above… I will make incorporation of the same into my page a priority… note that the page already says how good the Sparkfun customer support is! (^_^)

No public wish lists :(