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1  Using Arduino / Project Guidance / Re: Adding bluetooth feature to camera on: April 05, 2012, 08:37:52 pm
Given the hardware you've shown, and the constraints of the atmega328's limited RAM, the most feasible way I can see of doing this would be breaking out the wires from the sd card, and connecting them to digitally controlled SPDT switches or the like, so you can make the arduino switch the sd card from the camera to the arduino (just make sure youre not interrupting a file write). Then read out the file from the sd card to the arduino, sending a few bytes at a time over serial to the BT module to a computer, listening over BT serial, and then writing a program to reassemble the file. Lots of hoops to jump through, but very doable.
Good luck!
2  Community / Bar Sport / Re: Why good style is important ... on: March 24, 2012, 02:30:35 pm
Think you know C?
Google "Duff's Device"   smiley-twist
I love Duff's Device. The first time you see it, you scratch your head. The second time you see it you cry because you can't understand it. The 50th time you see it you cry tears of joy because you finally understand the damn thing...and its beautiful.

On another note, not even the most obfuscated C around can top anything written in brainfuck. Someone ought to write an arduino brainfuck interpreter.
EDIT: I've found my project for the last days of March Break! Time to get brain$@%$&#*ed.   
3  Using Arduino / Project Guidance / Re: Can I use an Arduino to generate or bypass an HDCP signal? on: March 24, 2012, 02:18:53 pm
This would be a lot more doable if your HD source supported component video.
4  Using Arduino / Project Guidance / Re: Can I use an Arduino to generate or bypass an HDCP signal? on: March 24, 2012, 02:16:13 pm
Not that it will really help you, but Bunnie Huang did some amazing work MITM-ing HDCP for his NeTV, should give you an idea of how difficult it is to do anything with HDCP .
5  Using Arduino / Project Guidance / Re: Gainspan wifi and RX-XV WIFLY on: March 24, 2012, 02:06:12 pm
Do yourself a favor, and don't get the gainspan module. I salvaged one out of an RC car, you have to sign an NDA to do anything. Hours and hours of work and I've just gotten it to show up as a WiFi AP.
6  Using Arduino / Project Guidance / Re: Transferring CMOS Camera image to handheld device on: October 26, 2011, 09:16:30 pm
Why not use the arduino for control and just use a regular IP camera for the video? You can probably find ones used for security or monitoring for pretty cheap:
Or even this if you can use wired (or have a wifi-ethernet adapter)

Obviously there are many better, higher quality cameras, but these were the cheapest I could find.
7  Community / Exhibition / Gallery / Re: Arduino Multi-Tool (Spectrum analyzer, multimeter, slow oscilloscope) on: October 20, 2011, 07:36:55 pm
@draythomp, I'm confused. A dso nano is an oscilloscope, this is an RF spectrum analyzer. Very different. Plus, this cost me about $20 to make, and a DSO nano is 90. Certainly would be nice if it was 20 though. If you're referring to the oscilloscope part of the project, the Atmega 328 is capable of something along the lines of 75k samples per second, whereas the DSO is capable of quite a bit more.

John44, I'm afraid you can't use my code as an electrical spectrum analyzer without some significant additions. I use the CYWM module to scan each frequency for me, which is a whole different animal from electrical signal spectrum analysis. Check out FFT for that. If you just want to graph ADC voltage on a display, you can use the graph function i already wrote in my code. MODECOUNT is a defined constant, saying that there are 5 different modes. Also, there is a more recent version of the code and hardware here:
8  Community / Bar Sport / Re: Anybody here participating in Stanford's Online AI/ML Classes? on: October 13, 2011, 05:53:15 pm
I'm signed up for the advanced track on both because they both look really interesting, but now I think I'll drop down to basic so I can focus on my real homework...
I would recommend that anyone remotely interested sign up for the basic track, just so you can read the assignments and watch the lectures.
9  Community / Bar Sport / Re: Free Stm32 Boards on: October 13, 2011, 05:48:08 pm
Just ordered! Thanks for the tip!

I do have to disagree with all of this anti-MSP430 sentiment though. You get a $4.30 development board, a virtually unlimited source of chips thanks to TI samples, and a speedy and lightweight  MSPGCC toolchain. They may not be as powerful as the Atmega328 or as easy to use as the arduino, but they are incredible cheap-as-dirt chips that sip power and are great for all sorts of tiny embedded projects.
10  Using Arduino / General Electronics / Re: External Power (3Com AC Adapter) on: October 10, 2011, 09:32:25 am
I do suspect that this is actually an AC-DC adapter, because the output voltage is +12, and there is no stated frequency.
11  Using Arduino / General Electronics / Re: How much voltage and mA do i need? on: October 07, 2011, 05:16:30 pm
Its ok to measure battery voltage in that manner, as battery voltage only varies slightly from the load drawn, and voltmeters have a very high impedance, because they can be placed in parallel with a circuit. Ammeters are meant to be placed in series with a circuit, to accurately measure current flow with minimal disruption to the circuit.
12  Using Arduino / Programming Questions / Re: computerless arduino? on: October 06, 2011, 08:01:47 pm
If I could use my android phone to edit, compile, and upload to arduino via bluetooth, that would be awesome. Too bad google and oracle are still fighting over some java issues and we probably don't get java on android very soon.

While Android can't execute Java bytecode, most android apps are written in Java then compiled by an android vm. I'm not saying it would be remotely easy, or even possible, because there is no port of AVR-GCC, but I could see it as maybe possible with lots of adjusted java code and a lot of reworking of AVR-GCC for the NDK. A much more feasible option would be, say, emailing/downloading/saving different precompiled programs to your phone which could be fairly simply transferred over ADK serial to an accessory which could act as an ICSP or serial programmer.
13  Using Arduino / Microcontrollers / Re: Help me find the right tool: 1 Analog input to USB on: October 06, 2011, 07:42:13 pm
I remember seeing this a long time ago. Looks like it supports hid, so im sure you could emulate a scroll wheel.
14  Using Arduino / Microcontrollers / Re: Microcontroller as USB host and device on: October 06, 2011, 07:39:57 pm
You could just use a Teensy / other AtmegaXU2 dev board or an arduino uno with a usb host shield. They can all enumerate as USB HID with the proper firmware. If you want a one chip solution, the At90USB1287 supports host and device, but im not sure if it can do both simultaneously. Any of the devices listed here will work with LUFA as a usb device and a host shield for usb host:

Good luck!
15  Community / Exhibition / Gallery / Re: WiFi Spectrum Analyzer on: September 30, 2011, 07:52:26 pm
If you get a chance, please do post your code, those improvements look great! This really is the best part of open source development, having others build off of and (significantly) improve a project.

Just a question- did you implement the drawing changes in the oscilloscope function too? How does that affect the speed?

Also, this project was featured on hackaday this summer, which was very exciting.

Happy Friday!
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