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January 7, 2009
about 6 days ago
The “re-wording” would be beyond me, and quite few others, I suspect. Sorry to mess with the catchy product name… (^_^) … but a library for us Arduino folk would be very welcome! Looks a neat device. Perhaps if you offered a free “development sample” to one or two with the skills?…
Pehaps the text at the top of…
… should be expanded to explain that while the library is fine for the Arduino IDE, the code will only work if the target board is a Teensy?
While of course a “mere” Arduino, say the Pro Mini, could not generated and plot a real-time frequency display for two audio channels, does this product actually NEED a Teensy, if the user is satisfied with “just” some text?? Library issues? What? It interfaces via a simple SPI… or is it I2C?… interface, after all?
How is this better than an UNO, other than you are saved the “nuisance” (???) of using a cable between the Arduino and the USB socket?
Though I will try to be positive: Two or more of these, we’ll call them ArduOTPs, pre-programmed, would be a great way for people to “pre-share” One-Time-Pad cypher keys. Alice is on the phone to Bob. (Each has one of my devices). I’m going to send you an encrypted text. I will use the key that the ArduOTP generates if you give it the seed 201702241214 (the date and time I wrote this comment. My Windows (ick) PC can generate that for me, thanks to Shortkeys (‘ray!) from q-d-t (without the hyphens… “q” 'cause all my keyboard macros start with a q-not-followed-by-a-u, so they don’t kick off except when wanted, d, t for Date/Time.
Bob notes the seed. Waits for document to arrive. Fetches de-crypt key from his ArduOTP with the seed, and all is secure!
If anyone works this up, either on a Redstick or other, I’d be happy to “advertise” for you at…
But… again… sorry… what’s it good for, if you don’t mind using a cable?
about 2 months ago
Info on a $3.35 PCB which is like a shield, but with just a bunch of pads… for prototyping work at the bottom of…
(The top is comments/ tutorial on the Thing.)
about 2 months ago
Info on simple $3.35 “proto shield” for devel work at bottom of…
(Along with comments on this Things cousin, the Thing, Dev Board.)
about 3 months ago
Not sure what the “stacking” idea is… is it more than a convenient way to connect two panels in parallel? Series? (From what you say, I guess series? Guess right?)
Is there any advantage to using the “two sockets/adjusting solder jumpers” beyond mere mechanical considerations?
Advice on buying solar panels for this would be welcome, as a note in the “Documentation” section.
I know enough to be confused…
Many “12v” panels on sale include a regulator, and are powered by panels which will generate up to 22v… more than recommended for the buddy, but using a Buddy “downstream” of another controller seems daft. And those controllers, it seems fail fairly often, anyway.
The power a panel can generate is clearly a buying criterion. Easy to miss how little power some panels can produce.
A 14v panel would seem “perfect”… Buddy spec’d for 6-20. I saw few if any of the “common” 10v panels.
Hooking two 6v panels in series might work… What Could Possibly Go Wrong? Ah… some places on the internet say that if one is in shadow, it will effectively open the circuit, and you won’t get any volts rather than, say 8v. The same sources speak of “bypass diodes”… but the correct spec for such a diode… and which way to connect it!… wasn’t clear to me.
So… get the idea?…
about 3 months ago
You need to INSTALL the OneWire library. This is a “once and for all” step. Then, with each project using Dallas 1-Wire chips, you need to INCLUDE the library in that project. (Note: “OneWire” and “Wire” are completely different things.)
To INSTALL: Go down “Sketch/ Include Library/ Manage Libraries”
Once that’s done, you can use “Sketch/ Include Library”, or just put #include <OneWire.h> at the top of the code by hand.
A way to put one on an Arduino (5v or 3V3) or on a Sparkfun ESP8266 Thing, with a “clever” (if somewhat “arcane”) way to deal with the need to delay between asking the sensor to take a reading, and asking it what the reading was, is explained at…
The solution given does not tie up the processor with a “Delay(1000)”, during which other things can’t be done.
The approach expects an IO pin to be dedicated for each sensor, but can be extended to allow more than one sensor.
Yes… it can. You can READ the sensor a few times in 5 seconds. It is “a small blob of plastic” (a bit like an “ordinary” transistor). There’s no complex heat transfer mechanism to make it “instantly” reflect a “new” temperature around it. If the tture rose by 5 deg F, I would quess that the sensor would show at least 4 of those degrees within 5 minutes, max. So many variables here! Is the room’s air “well stirred”. Is the sensor in a “dead zone”, near the wall? Did all of the air in the room “jump” by 5 degrees, all at once? Etc.
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