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31  Using Arduino / Project Guidance / Re: Log Data to SD Card, Wirelessly Transfer Data to PC on: September 21, 2011, 02:44:29 pm
I'm by no means an expert, but your project sounds feasible.

Personally I would start right way to get the sampling and storing done, then as soon as the "official" Arduino WiFi shield comes out (announced the other day at the Maker Faire) I would buy one of those and get started on the data transfer problem.

Of course you could get any of the existing WiFi shields as well, but why do that when you can be cool with the new and hot one very soon. ;-)

Good luck!

32  Topics / Device Hacking / Feasibility: Fa. Assmann Universa 80 as external storage device? on: September 04, 2011, 09:07:38 am
I just found this odd-looking device on and it seems like it is some kind of giant floppy disk, but originally intended for audio.

Anyone has experience with this, or similar devices?

1 - What is it?

2 - How does it work?

3 - Could it in theory be used/hacked into an external storage device for the Arduino?
Idea: Control play/stop/record using with digital outs. Use Manchester encoding to read/write data.

Only a couple of hours left on the auction, so early input is appreciated. :-)

Thanks in advance!/Anders

33  Community / Bar Sport / Re: Books worth reading on: July 08, 2011, 01:10:00 am
K&R C.

I really liked Zen and the Art of Motorcycle Maintenance, but I admit it probably doesn't do much for Arduino development.


K&R is certainly a classic. Regarding the other book, one should not underestimate the influence of litterature and culture as a source of inspiration. I still remember stumbling upon Count Zero and Neuromancer (W. Gibson) way back in 1987. Count Zero was just out then. I was into the C64 demo scene and dreaming about a Amiga 500. In a way, those books contributed to my later career choice! They were just so cool! :-)

34  Community / Bar Sport / Books worth reading on: July 07, 2011, 08:46:14 am
I haven't counted, but I would bet that 8 out of 10 questions on this forum begin with some variation of "I'm totally new to electronics and programming ...". Being quite new to this world myself, I have been looking around for sources of knowledge and I thought I'd share two books that I have found to be very useful, even if they don't deal with the Arduino specifically.

The first one is Making Things Move, DIY Mechanisms for Inverntors, Hobbyists and Artists by Dustyn Roberts.
It's a great book that is very hands on and easy to grasp, while still providing you with enough depth to understand the underlying principles. It provided me with mental tools and courage to go on and try my own ideas. A great and easy read!

The second one is Practical Electronics For Inventors (2nd edition), by Paul Scherz. Among other things, this book demystified all those capacitors that "inexplicably" show up in more or less every circuit you will find. I bought it as a backup option when ordering the classic The Art Of Electronics, by Horowitz and Hill. This is indeed a thorough book, but I found Practical Electronics For Inventors to be much more useful for me. Having both doesn't hurt though.

What do you read?


35  Topics / Science and Measurement / Re: Brewing thermostat on: July 07, 2011, 08:26:43 am
I've no idea specifically why it didn't work, but generally I can say that my experience is that if all connections are fine (triple checked and measured), you should have a look at the power supply. It is one of the things that also changes when moving off from the breadboard and into "reality". Powering from an USB, or desktop power supply with nice smooth voltage and steady current is something completely different than a dodgy old car battery, solar cell or whatever you end up connecting you thing to in the end.

36  Using Arduino / Programming Questions / Re: Sequencer groove on: July 03, 2011, 02:31:18 am
I think you need to restructure and break up your code first. When that is done, you can go into more advanced optimizations if needed.

As mentioned early on in this thread, you should restructure your code so that reading inputs is a separate step from acting on the inputs. This way you can easily gain cycles just by skipping some actions and performing them only every N:th loop, or every N:th millis (better).

37  Using Arduino / Programming Questions / Re: Best serial terminal for MacOSX? on: July 03, 2011, 02:06:37 am
Two good tips, thanks!
38  Using Arduino / Programming Questions / Best serial terminal for MacOSX? on: July 02, 2011, 03:32:54 pm
this might be the wrong part of the forum as it is not directly related to programming, but maybe to the related topic "debugging". ;-)

Anyway, for debugging and serial interaction with the Arduino I have been using the "Serial Monitor" in the ArduinoIDE and sometimes the screen command, but I was wondering if there are better/alternative tools available.

I have been looking at the iSerialTerm (URL below), but before I buy, I would like to know what alternatives people are using on the Mac.

Any favorites out there?


39  Using Arduino / Sensors / Re: Ultrasonic sensor to determine water level? on: July 01, 2011, 01:21:06 pm
I didn't get around to installing it yet, but maybe you don't have to deal with the 30cm distance problem if you place your sensor cleverly, or use several sensors? For me it is mainly to detect if the water level is running low, so if the magnet is far away, it just means that everything is fine.

Anyway, I did get several quite strong magnets just to be on the safe side when building it.

The magnet I am planning to use is a ring magnet with 7.7kg strength. I hope it will do the job.

I also got a couple of these

and finally

40  Using Arduino / Microcontrollers / Re: Freetronics Eleven vs Genuine Arduino on: July 01, 2011, 12:46:48 am
I have no experience with the Freetronics Eleven, but I have tried other clones (Seeeduino and Freeduino) without problems. I would even hold the Seeeduino to be slightly better than the original.

If it says 100% compatible you can probably expect it to be.

Good luck!
41  Using Arduino / Microcontrollers / Re: Digital ports Seeeduino Film on: June 30, 2011, 08:02:34 am
I've no idea about the stars thing. I would just code away while waiting for the device and then try it out.

If it compiles in the Arduino IDE, there is a good chance it will run without a hitch when you get the device.

42  Using Arduino / Sensors / Re: Ultrasonic sensor to determine water level? on: June 30, 2011, 06:59:22 am
I have dealt with the exact same problem, but for a 20L tank and found several threads in the subject of water level measurement on this forum. Search around and you will find a lot of good input.

All-in-all, I have decided to go for a float with a neodymium magnet on it and measure the magnetic field strength using a Hall effect sensor. This has the added benefit that your electronics can be outside of the tank, provided it is plastic. IR will probably work as well I guess.

43  Using Arduino / Microcontrollers / Re: Digital ports Seeeduino Film on: June 30, 2011, 06:54:17 am
I believe the Seeduino Film is a completely Arduino compatible clone, i.e. all pins are the same and named the same. If it works on your regular Arduino, the same program should work unmodified on the Film. Haven't tested, but that's the theory at least.

44  Using Arduino / Microcontrollers / Re: "[...] please define PAGEL and BS2 signals" (ArduinoISP + ATiny85 problem) on: June 30, 2011, 06:16:57 am
Indeed I am!

This is all done using a first generation alu Macbook running Snow Leopard (MacOSX 10.6.7).

45  Using Arduino / Microcontrollers / Re: "[...] please define PAGEL and BS2 signals" (ArduinoISP + ATiny85 problem) on: June 30, 2011, 02:06:45 am
Thank you both!

@Coding Badly
I gave the thread a read and I will try out some of the tips. I think I came across that thread last week, but at that point I was still reading up and not trying out yet.

Yes, that's what I will do near-term to continue learning about programming the thing. Going forward I would like to have a fully working configuration though, if possible.


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