I had the same idea, and I'm pretty sure that would work, the problem is that it increases the complexity of the control circuit (I would now have to control multiple EM coils and with good timing). The goal is create a large matrix of these and each additional complexity in control will result...
Hi-
I'm trying to build a simple linear motion control using a solenoid. I've replaced the typical steel core for a permanent magnet core so that I can both push the armature out and pull it back in by flipping polarity (and without using any springs). This works nicely.
Unfortunately, it still...
So far these techniques are not working, although it is possible that my 9v battery is low or dead. I'll try again, but in the mean time any other ideas?
This is an excellent topic! Does anyone know if you could create the same change in capacitance using magnet or electric fields? (Eg with minimal or no physical contact but instead using an electric field to initiate a registered touch response)?
If so, how might you actually test this?
Yes, but no. Actually, I've made multiple capacitive styli using various methods and materials and they work like any other capacitive stylus.
I'm actually trying to create the effect of a stylus touching a capacitive screen, but without having to make physical contact with a large conductive...
Yes, I have, but I'm not trying to create a touchscreen. I'm actually trying to create an object which is detected by the touchscreen as finger input but through a minimal contact point (e.g. a point smaller than a typical finger tip)
Interesting.. i will give it a try!
I'd like to use a reliable and consistent power source - like a battery. How might I get a similar effect using an electrical current?
How to create a "projected" electric field
First of all, apologies for my naivete, it's been many years since I've studied electromagnetism or electrical engineering in detail, but here goes anyway...
I am trying to generate a small electric field (about the size of a marble). I am aware of...