RE: Pulse Sensor: an Open Source Heart-rate Sensor that Rocks by Yury Gitman � Kickstarter
Hi, Guzman (in Uruguay) make an prototipe that run on XO with the Turtle Art Activity: http://www.youtube.com/watch?v=y69Mu1SDXDk > Date: Wed, 20 Jul 2011 23:28:57 -0400 > Subject: Re: Re: Pulse Sensor: an Open Source Heart-rate Sensor that Rocks by > Yury Gitman � Kickstarter > From: walter.ben...@gmail.com > To: fors...@ozonline.com.au > CC: devel@lists.laptop.org > > So cool. > > -walter > > On 7/20/11, fors...@ozonline.com.au wrote: > >> I have a partially complete refactoring of the camera code that should > >> speed things up; in the meantime, I wonder if a simple resistive light > >> sensor run through the mic input wouldn't do just as well. > >> > > > > A cadmium sulphide photoresistor (ORP12 equivalent) worked OK measuring > > resistance in Turtle art > > > > Cover cell with little finger and hold near bright light. Pulse gives +-50 > > ohms in 3000 ohms. > > > > Screenshot attached > > > -- > Walter Bender > Sugar Labs > http://www.sugarlabs.org > ___ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Re: Pulse Sensor: an Open Source Heart-rate Sensor that Rocks by Yury Gitman � Kickstarter
So cool. -walter On 7/20/11, fors...@ozonline.com.au wrote: >> I have a partially complete refactoring of the camera code that should >> speed things up; in the meantime, I wonder if a simple resistive light >> sensor run through the mic input wouldn't do just as well. >> > > A cadmium sulphide photoresistor (ORP12 equivalent) worked OK measuring > resistance in Turtle art > > Cover cell with little finger and hold near bright light. Pulse gives +-50 > ohms in 3000 ohms. > > Screenshot attached -- Walter Bender Sugar Labs http://www.sugarlabs.org ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Pulse Sensor: an Open Source Heart-rate Sensor that Rocks by Yury Gitman � Kickstarter
On Wed, Jul 20, 2011 at 12:33 AM, wrote: > Hi > > You can do something similar by placing a finger over the camera and shining > a light on your finger. > > Unfortunately TurtleArt is a little slow to capture your pulse, the following > executes a cycle in about 0.5 sec on a XO1.5 > > forever > show camera > read pixel > show heap > empty heap > > This prints the rgb of one pixel centre image ( which is OK because the image > is out of focus) > > forever > print brightness > > averages over the image and takes round 2 seconds I have a partially complete refactoring of the camera code that should speed things up; in the meantime, I wonder if a simple resistive light sensor run through the mic input wouldn't do just as well. I also have a vague memory of someone trying something similar using audio and the Measure activity. -walter > > Tony > > >> 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? >> >> Sameer >> ___ >> Devel mailing list >> Devel@lists.laptop.org >> http://lists.laptop.org/listinfo/devel >> >> _ >> This mail has been virus scanned by Australia On Line >> see http://www.australiaonline.net.au/mailscanning > > ___ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel > -- Walter Bender Sugar Labs http://www.sugarlabs.org ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Pulse Sensor: an Open Source Heart-rate Sensor that Rocks by Yury Gitman � Kickstarter
On Tue, Jul 19, 2011 at 9:33 PM, wrote: > Hi > > You can do something similar by placing a finger over the camera and shining > a light on your finger. True. I've seen an Android app like that. Sameer > > Unfortunately TurtleArt is a little slow to capture your pulse, the following > executes a cycle in about 0.5 sec on a XO1.5 > > forever > show camera > read pixel > show heap > empty heap > > This prints the rgb of one pixel centre image ( which is OK because the image > is out of focus) > > forever > print brightness > > averages over the image and takes round 2 seconds > > Tony > > >> 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? >> >> Sameer >> ___ >> Devel mailing list >> Devel@lists.laptop.org >> http://lists.laptop.org/listinfo/devel >> >> _ >> This mail has been virus scanned by Australia On Line >> see http://www.australiaonline.net.au/mailscanning ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Pulse Sensor: an Open Source Heart-rate Sensor that Rocks by Yury Gitman � Kickstarter
Hi You can do something similar by placing a finger over the camera and shining a light on your finger. Unfortunately TurtleArt is a little slow to capture your pulse, the following executes a cycle in about 0.5 sec on a XO1.5 forever show camera read pixel show heap empty heap This prints the rgb of one pixel centre image ( which is OK because the image is out of focus) forever print brightness averages over the image and takes round 2 seconds Tony > 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? > > Sameer > ___ > Devel mailing list > Devel@lists.laptop.org > http://lists.laptop.org/listinfo/devel > > _ > This mail has been virus scanned by Australia On Line > see http://www.australiaonline.net.au/mailscanning ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
Re: Pulse Sensor: an Open Source Heart-rate Sensor that Rocks by Yury Gitman ? Kickstarter
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. -- James Cameron http://quozl.linux.org.au/ ___ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
