goldencoin
Gold Member
Hello everyone
For the past few weeks, me and my physics class have been making metal detectors. We started by printing the circuit board design on the copper side of a circuit board. Then, we dipped them in acid to eat at the copper that was exposed. After drilling holes into it, we put various transistors, semiconductors, and other sciencey stuff. Afterwards, We built the coils by making three wooden circles, one smaller then the other two, then wrapping copper wire around the small one and gluing it all together. Additionally, we glued copper on it so it would not false when we moved it up an down.Then, we made a tuning device, a volume control, and a switch. Lastly, we held it all together with hot glue and tape. Nine people participated, one didn't bother to finish it, some didn't show up for the hunt, others fell apart or shorted out. Basically, mine and one other person's worked well enough for the hunt. My teacher buried around a hundred in dollar coins and quarters, plus some foreign coins. I found $37 in dollar coins, $19 in quarters (one dollar roll and the quarters were taped together), and a chocolate coin. Then I cleaned up with my DFX and was surprised to have only found nine remaining dollar coins and 4 foreign coins. Additionally, my sister showed up and used my detector to find three dollar coins.
HH
-GC
For the past few weeks, me and my physics class have been making metal detectors. We started by printing the circuit board design on the copper side of a circuit board. Then, we dipped them in acid to eat at the copper that was exposed. After drilling holes into it, we put various transistors, semiconductors, and other sciencey stuff. Afterwards, We built the coils by making three wooden circles, one smaller then the other two, then wrapping copper wire around the small one and gluing it all together. Additionally, we glued copper on it so it would not false when we moved it up an down.Then, we made a tuning device, a volume control, and a switch. Lastly, we held it all together with hot glue and tape. Nine people participated, one didn't bother to finish it, some didn't show up for the hunt, others fell apart or shorted out. Basically, mine and one other person's worked well enough for the hunt. My teacher buried around a hundred in dollar coins and quarters, plus some foreign coins. I found $37 in dollar coins, $19 in quarters (one dollar roll and the quarters were taped together), and a chocolate coin. Then I cleaned up with my DFX and was surprised to have only found nine remaining dollar coins and 4 foreign coins. Additionally, my sister showed up and used my detector to find three dollar coins.
HH
-GC
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from the pics you all had a blast. You said they only read to about 4 inches well now its time for another class to get them to go deeper. I admire your teacher, good to see something new come out of classes other then the old basic junk no one even wanted to keep after they made them. Will trade you nine ash treys and a bird house that would terrify a woodpecker for what you made. lol
RR
