Hi Martin I know that my Braille display and MacBook Pro are two examples of this. If I put them together and touch them both together, I get an electrical tingle through my fingers. Also if you run your finger along the top of the display, you can sort of feel the tingling sensation to a lesser extent.
Also if you put the terminals of a 9 volt battery to your tongue, you get a nasty tingle. It doesn't hurt exactly, but it isn't comfortable. I certainly wouldn't be comfortable with the idea of having a sensor attached to my tongue. I really don't think that is a workable option. Gordon On 30 Jun 2012, at 19:20, Martin McCormick <[email protected]> wrote: Hi Lynne and Gordon, It doesn't sound that workable to me. Electrical stimulation of nerves tends to defuse throughout the area near the site of the stimulation. I have felt this myself if I touched something that had enough voltage potential to be felt. The relatively dry skin of your fingers is somewhat resistive but if you feel the charge, you feel it over a rather undefined area. The whole tip of your finger tingles with maybe a little more tingling at the exact site. Since the tongue is wet, it takes much less voltage to shock it, but the whole end of your tongue feels it. It's really very unpleasant. An old trick to check a battery such as a 9-volt battery is to briefly touch your tongue to the terminals. I did that once or twice as a small boy and nothing terrible happened, but a good battery is just before painful. There are much better ways to do this and that is 50 more years of experience speaking than at the time I did the original tests. A bit of a smile is in order. There have been other attempts to display images on one's back or stomach somewhat like what the Optacons did with our finger tips in the 1970's, but the trouble with backs and stomachs is that the nerve ending density is much, much lower than it is on our lips and tongues. I have never heard of anybody before using direct electrical stimulation through the skin. Having experienced this both accidentally and deliberately, I would not like anything that did that as a manner of course. Martin "Mrs. Lynnette Annabel Smith" writes: > Hello Martin > > Gordon is saying he wouldn't be happy about the prospect of using an oral > device in this manner. So I just wonder how seriously we should be taking > this project. > > Lynne ======================================= The Techno-Chat E-Mail forum is guaranteed malware, spyware, Trojan, virus and worm-free To modify your subscription options, please visit for forum's dedicated web pages located at http://mail.tft-bbs.co.uk/mailman/listinfo/techno-chat You can find an archive of all messages posted to the Techno-Chat group at either of the following websites: http://mail.tft-bbs.co.uk/pipermail/techno-chat/index.html Or: <http://www.mail-archive.com/[email protected]> you may also subscribe to this list via RSS. The feed is at: <http://www.mail-archive.com/[email protected]/maillist.xml> --------------------------------------- ======================================= The Techno-Chat E-Mail forum is guaranteed malware, spyware, Trojan, virus and worm-free To modify your subscription options, please visit for forum's dedicated web pages located at http://mail.tft-bbs.co.uk/mailman/listinfo/techno-chat You can find an archive of all messages posted to the Techno-Chat group at either of the following websites: http://mail.tft-bbs.co.uk/pipermail/techno-chat/index.html Or: <http://www.mail-archive.com/[email protected]> you may also subscribe to this list via RSS. The feed is at: <http://www.mail-archive.com/[email protected]/maillist.xml> ---------------------------------------
