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January 7, 2009
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?
about 4 months ago
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). http://sheepdogguides.com/lut/dstl2hello_ds18b20.htm
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 http://sheepdogguides.com/lut/dstl2hello_ds18b20.htm)
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…
about a year ago
An unofficial (user created) tour of the Qduino’s pins is now available…
… and notes on what is in the library…
News - Introducing the Qduino Mi…
about a year ago
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 :(
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