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12811  Using Arduino / Project Guidance / Re: Connect 3 accelerometers to Arduino Uno on: November 09, 2012, 07:26:06 am
You could connect three three-axis devices to a Mega, but because the Mega has only one ADC, the update rate would be one third the rate for a single three-axis accelerometer.
Digital devices are normally I2C, and if you can specify a different bus address for each device, then you can attach more than one.
12812  Topics / Interactive Art / Re: Sincronizar video desde el PC con Arduino. Ayuda, por favor!! on: November 09, 2012, 05:46:48 am
Perhaps a colour sensor taped to the video screen?
12813  Topics / Interactive Art / Re: Sincronizar video desde el PC con Arduino. Ayuda, por favor!! on: November 09, 2012, 05:10:00 am
http://www.ti.com/product/lm1881
12814  Using Arduino / Programming Questions / Re: Charliplexing Code without Library on: November 08, 2012, 04:58:36 pm
Quote
the columns are the anodes and the rows are the cathodes.
I think you may not understand how charlieplexing works, or how the diodes are wired.
Diodes are wired in opposing pairs across all combinations of pins.
12815  Using Arduino / General Electronics / Re: Trying to understand pull-up resistors on: November 08, 2012, 04:48:23 pm
Something that often surprises is the case of a 1 kohm resistor with one end connected to, say, 5V and the other end to one side of an open switch whose other side is connected to ground.
What is the voltage across the open switch?
And if the resistor is 1 Mohm?
12816  Using Arduino / Project Guidance / Re: sample and encode a picture on: November 08, 2012, 04:24:10 pm
For reference, a 32 x 32 pixel image, with eight bits per pixel occupies 1 kbyte.
Is that low enough resolution?
12817  Using Arduino / Programming Questions / Re: Sending and Receiving 10 Bit integers to/from Arduino and Processing on: November 08, 2012, 03:36:01 pm
Reverse the technique in reply #1
12818  Using Arduino / Programming Questions / Re: Sending and Receiving 10 Bit integers to/from Arduino and Processing on: November 08, 2012, 03:31:08 pm
Or highByte  and lowByte.
12819  Using Arduino / Installation & Troubleshooting / Re: Serial monitor broken ? on: November 08, 2012, 12:53:56 pm
Quote
Yes as stated in OP thanks.
which terminal emulator?
12820  Using Arduino / Project Guidance / Re: ISA to usb converter on: November 08, 2012, 12:28:33 pm
Can't you use one of those ISA/USB disk adapters?
12821  Using Arduino / Installation & Troubleshooting / Re: Serial monitor broken ? on: November 08, 2012, 12:17:14 pm
Have you tried a terminal emulator?
12822  Using Arduino / Programming Questions / Re: Speed of floating point operations on: November 08, 2012, 10:39:20 am
Your parameter is effectively a constant - maybe the compiler optimised the call to sqrt away.
12823  Using Arduino / Programming Questions / Re: variables undeclared on: November 08, 2012, 10:06:36 am
Quote
I have experienced an error in my code
Which strangely, you have omitted to post.
12824  Using Arduino / Displays / Re: Auduino lesson1: LCD and bluetooth exercise on: November 08, 2012, 09:46:35 am
Was there a question, or do you want me to move this to the "Exhibition and gallery" section?
12825  General Category / General Discussion / Re: Bidirectional dc-dc converter on: November 08, 2012, 08:45:52 am
Which converter?
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