A conductor is not going to give off magnetic unless its feeding something. Now, if you use a switch, you can switch in a coil or a probe, to get either component, but to get specific wires close to others, you also need a high freq generator. greg
How about this:
---+---/\\/\\/------+----- Vcc ! ! ! \\ --- !/ / --- ---! \\ ! ! !\\e VX ! ! ! ! ! ! Vx ! ! Vx / ! ! +-----/\\/\\--- Load \\ +------------+ ! / ! ! ! ! !/ ! ! +--! ! !/e ! !\\e ---! ! +-/\\/\\-!!- Vx !\\ --- ! ! --- \\ GND ! / GND \\ ! GND
-- -- kensmith@rahul.net forging knowledge
I never thought of this, but if you used a stereo amplifier, you could feed static to left and magnetic to right, using headphones would get some interesting results.
greg
I used to do this when I was a kid, and I got both electrostatic and magnetic coupling to an unshielded coil, and you could hear the difference. Try it.
John
In article , wrote: [... tracing wires ...]
I don't think this is right.
If you impose a low frequency common mode AC signal onto a power line you will be able to follow it with something that detects AC magnetic fields.
If you impose a high frequency signal, it will couple into nearby lines. If two lines run a long distance side by side and then diverge, you won't be able to tell which one is which.
It would be a fairly simple matter to put a few amps of, lets say, mains / 2 Hz onto a wire. A coil on a high mu core would be able to see it fairly easily. Since you have access to the transmitter, you can use a sync rect in the detector stage to improve things further.
-- -- kensmith@rahul.net forging knowledge
Right. So connect a load, something characteristic maybe, like a dimmer of a blender.
If the pickup coil is unshielded, it will pick up the E field as well, which does *not* need current. But I said that already.
The shape of the E or H fields won't depend on the frequency, at least not until you get way beyond the audible range. Way beyond.
Try it.
John
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.