I am trying to make my own core rope rom, according to the link. I have 15mm ferrite cores, which I wound about 30 times with 1mm magnet wire. I thread the primary ( also 1mm wire) through one of the cores (once) to test it. That was connected to a diy dc pulse generator based around the 555 timer, which is fed 9v. When I first tested it, I barely got any voltage from the secondary, about 1mv according to my multimeter set to dc (my ac 200v range which is the lowest picks up nothing). I also tried connecting a low power led, which did not light up. I figured the dc was not being pulsed at a high enough frequency (7.5hz ish) so I changed the circuit for the dc pulser so that it puts out at about 45hz. However, I’m still having the exact same problem. Can anyone think of anything i might be doing wrong? At this point, I’m assuming i am not using the correct frequency. If so, is there a way I can calculate this? Any help would be much appreciated.
the pulse will be very brief, if you have't got some sort of oscilloscope it will be hard to observe. Perhaps use it to trigger some sort of flip-flop, or flash a high-brigtness LED.