(OK, I know it’s not a sensor, it’s an actuator, so mods feel free to move this thread :D)
I’m thinking of using an electromagnet on the end of a robot arm to pick stuff up. So far the smallest one I found is here (14kg lift) but a tiny one that can lift a few 100g would do.
I know I can make one with an old nail and some wire, would rather buy one.
Anyone know of suppliers of small ones please?