I took apart an old dead CDROM drive and grabbed the head placement drive. A little bit of playing and I sussed out the motor pin out and here the arduino is just doing 50 steps back and forth.
A cool bit of kit I salvaged from and old HP inkjet. Also got a couple of dc motors and a couple of microswitches.
Scientists have rediscovered a centuries-old procedure for supercharging your brain. Depending on how its used, it could improve anything from focus to motor control to mathematical or even moral reasoning. Its simple. Its relatively cheap. The known side effects are minimal. And its so easy that you can do it…
Alpha (untested) tDCS (trans-cranial direct current stimulation) circuit built on circuits.io. Great site for ee types.
Should deliver switchable 1ma/2ma current.
Yes, I’m going to shock my brain. Of course, 1-2ma is nothing and unlikely to cause any problems at all, but I’m going to be extra careful anyway.