On Wed, Jul 20, 2011 at 12:22:23AM -0400, Kevin Mark wrote: > On Wed, Jul 20, 2011 at 01:25:31PM +1000, James Cameron wrote: > > On Tue, Jul 19, 2011 at 08:07:40PM -0700, Sameer Verma wrote: > > > http://www.kickstarter.com/projects/1342192419/pulse-sensor-an-open-source-heart-rate-sensor-that > > > > > > Minus the Arduino, can this plug into the audio/mic port? > > > > That would be a question for the designers. I could not figure it out > > from the context. > > > > I can tell you, based on the Arduino board that is used, and my > > knowledge of the pinout, that the sensor uses 5V from the board, and a > > ground, and the signal from the sensor enters one of the Arduino analog > > inputs. However, the analog inputs can be used for digital data as well > > as analog data, so this is inconclusive. > > > > For the XO, the sensor would require 5V power, perhaps from the USB > > port. > > > > I can't tell if the sensor output is compatible with the microphone > > input. > > > Do you know what kind of voltage that mic input can handle? > +/5 VDC?
I can't tell if the sensor output is compatible with the microphone input, because I don't know if the sensor output is digital or analog. Sorry for not making that obvious enough. But to answer your question literally, the microphone input can handle from -0.5V to +5.0V DC, beyond which damage will occur unless current is limited. The useful range is 0.4V to 1.85V for XO-1. > this seems like it would be related: > http://wiki.laptop.org/go/Making_XO_sensors/How_to_connect_sensors Not really. That page only describes how to connect sensors, not whether sensors are suitable, nor whether they will cause damage. I think http://wiki.sugarlabs.org/go/Activities/TurtleArt/Using_Turtle_Art_Sensors is far more relevant. But still, without knowledge of the sensor output, we can but speculate. -- James Cameron http://quozl.linux.org.au/ _______________________________________________ Health mailing list Health@lists.laptop.org http://lists.laptop.org/listinfo/health