I wish I could remember!

It was a long time ago, and at that time it was not of much interest to me, so I did not bookmark it.

Anyway, spent some time googling for that information (without remembering anything about it, like the purpose, chip used and so on), quite unsuccessfully, and then found something not quite in the line of discussion, but interesting all the same.

http://www.t4f.org/projects/open-rfi...rfid-emulator/

As also, another interesting page, not quite connected with the discussion.

http://www.solarink.net/2014/02/a-pi...-one-volt.html

Anand