12/08/2007 by peter.

Electromyograph electrodes. Since any company that sells them only sell them to research institutions so they look rather hard to get hold of as an private individual/mad inventor. BUT WAIT!! Thanks to the internet and those intrepid sexual adventurers we have e-stim, although I knew of its existence before, what i didn’t know/think of until I stumbled across it, they use the thing I’m looking for in reverse, these!! and what’s more they even sell the conductive gell. Well that’s that sourcing problem sorted out, just need to find a photoplethysmometer/Geer gauge.

Oh and the volunteer to try it all on.

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12/08/2007 by peter.

After getting my little photo sensor (one of theses) attached to my PIC I started playing with it using a torch and my little finger i can sometimes pick up a pulse but it is very sensitive to movement and the pulse only shows up in the 2 LSBs. This problem may be alleviated somewhat when measuring form inside someone. Anyhoo that is a problem to be sorted when I have a willing subject to test on.

But that aside, the electromyograph idea still needed a bit of thinking before anything could be built and I had no Idea if the output from it could be useful. Then I found this. Looks like we may be onto something here. All I need now is the person and the electrodes. Oh and the amplifier hardware. Oh and a data logging device. Hmmm… This is turning into a bit of a big project.

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