They use the resistance in the magnetic strip on a credit card to input data. In this design they use a finger drawn along the black stripe and a stripe of conductive metal tape to produce midi-info for a computer. But could this aproach be usefull in robotmaking? Would it be practical to use for reading the position of a robot arm? any other uses?
I have access to quite a few of these cards from an old security system, so if anybody can think of a worthy experiment, I'll gladly donate a few.
so, have cards with info on so that depending on witch one you stick in the robot it would change its actions? sort of like changing thr code just by changing the card and not having to download it from a computer ?
My kids had a toy a couple My kids had a toy a couple of years ago that could be "progreammed" by inserting different cards with mag strips containing instructions. Went in the bin quite soon cos it was boring.
When I was bout 10, I took out the “head” from a tape-recorder, and took it’s output wires into a microphone / amplifier.
At the time, my bank-book had a magnetic strip on it, and I realized that it “played sounds” when I moved the head over it.
When I was teenager, I got a social security-card that had a magnetic strip on it - just like a credit card today. Ire-did the experiment, and this time made sort of amusical instrument; One could “scratch” a plastic card along a piece of cardbord on a box, and make … sounds
Now I am an old fart making robots when time… and I have of course considered re-doing it. Only, this time, I was considering reel-to-reel-tapes glued onto a track of some sort, and then having the tape-recorder-head pick up the info below the robot…
Point is; Get a tape-recorder and an amplifier (say, from some PC-speakers) - hook up to same ground as the microcontroler, and your analouge in could be “listening” to your granmoms voice below it’s wheels…
