Greetings !
I am using the Velleman K7102 build-it-yourself Metal Detector kit pictured below to make a pinpointer for use during the recovery of coins, jewelry and other items in the ground while using my metal detector.
After completing the solder work on the PCB, I will be installing it inside a small plastic electrical box w/plain cover as an enclosure and then attaching a plastic tube with end-caps to the side of the box. The ferrite rod with it's copper wire windings (transmit and receive coils) will be mounted inside the front end of the tube which extends beyond the front of the enclosure box by about 6".
Looking at the picture below (click to enlarge) notice that the L1 coil has 120 turns and the L2 has 43 turns. I want to install the ferrite rod and coils into the tube so that the signal transmitter coil is at the front end of the tube and the receive coil behind it. My problem is I don't know how to determine which coil is the transmitter.
Is it possible to identify the Transmitter coil from the Receiver coil merely by the number of windings ? Or does it depend on what circuit components are tied-in with the ends of each coil ? Or is there a test I can do with my VOM after completing the windings on the ferrite rod ?
Your help with these questions will be appreciated.
ToddB72
I am using the Velleman K7102 build-it-yourself Metal Detector kit pictured below to make a pinpointer for use during the recovery of coins, jewelry and other items in the ground while using my metal detector.
After completing the solder work on the PCB, I will be installing it inside a small plastic electrical box w/plain cover as an enclosure and then attaching a plastic tube with end-caps to the side of the box. The ferrite rod with it's copper wire windings (transmit and receive coils) will be mounted inside the front end of the tube which extends beyond the front of the enclosure box by about 6".
Looking at the picture below (click to enlarge) notice that the L1 coil has 120 turns and the L2 has 43 turns. I want to install the ferrite rod and coils into the tube so that the signal transmitter coil is at the front end of the tube and the receive coil behind it. My problem is I don't know how to determine which coil is the transmitter.
Is it possible to identify the Transmitter coil from the Receiver coil merely by the number of windings ? Or does it depend on what circuit components are tied-in with the ends of each coil ? Or is there a test I can do with my VOM after completing the windings on the ferrite rod ?
Your help with these questions will be appreciated.
ToddB72
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