Tweet
Hi Everyone.
I'm new on the forums and I've been reading a lot about metal detectors, as I'm trying to make one for a college project.
First I tried observing changes in inductance at the resonant frequency, with good results using a rfid antenna, but then I tried using a big rectangular antenna, 10 loops of 12 AWG cable and a size of 180cmx30cm and nothing happens when I put metal object inside the loop.
So, I'm thinking on building an induction balance detector using 2 overlapped rectangular antennas, and the question is: How much turns should I use of 14 AWG cable (the one I have) if the antennas will be about 180cm high and 20cm wide? (so they can fit in a 30cm approx space).
I would like to build a multiple zone - Pulse induction detector, but time and components are limited.
Also, How important is driving power of the coils for detection, as I'm using a signal generator IC that gives a clean 6v sine wave. Should I amplify it or is it ok for IB?.
Thanks for your help
I'm new on the forums and I've been reading a lot about metal detectors, as I'm trying to make one for a college project.
First I tried observing changes in inductance at the resonant frequency, with good results using a rfid antenna, but then I tried using a big rectangular antenna, 10 loops of 12 AWG cable and a size of 180cmx30cm and nothing happens when I put metal object inside the loop.
So, I'm thinking on building an induction balance detector using 2 overlapped rectangular antennas, and the question is: How much turns should I use of 14 AWG cable (the one I have) if the antennas will be about 180cm high and 20cm wide? (so they can fit in a 30cm approx space).
I would like to build a multiple zone - Pulse induction detector, but time and components are limited.
Also, How important is driving power of the coils for detection, as I'm using a signal generator IC that gives a clean 6v sine wave. Should I amplify it or is it ok for IB?.
Thanks for your help