I was wondering if it is possible to trigger a solid state, ssr, relay from afar. I would assume it would be possible to trigger a magnetic field relay with a strong enoug magnet from some distance, but is it any ways to force an arduino to produce current in the wires and activate a ssr relay from a distance. Lets say the relay and the arduino is inside a wooden box and you try to trigger it from the outside? Its for a locking system.
The powersupply for the arduino can be outside of the wooden box, atleast the 240v ac part, if this matters. Also for the relay, the powersupply for the ac part, 240v, is also outside of the wooden box.
I was thinking about using a relay called,
TWTADE SSR-40 DD 40A DC 3-32V to DC 5-60V SSR Solid State Relay + Heat Sink
Yes I think! More information would be a big help. Links to technical information would help as we have no idea what else is involved. A block diagram would be useful.
SSR uses a LED to turn the relay on. IF you use a 5 volt Arduino, the relay with wires could be 1/2 mile away and the Arduino would still turn the relay on and off.
You can't directly trigger an electromagnetic or SSR with a magnet.
But there are "magnetic switches", commonly used in alarm systems. They are usually low current but the magnetic switch could be used to control a relay for high power.
But the magnet does have to be "close" and I assume you are aware of the inverse square law... even a very powerful magnet won't work at a long distance.
In the movies yes in real life no! Place your SSR in series with a magnetic sensitive switch using the appropriate power supply. That eliminates the Arduino.