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184_projects:metal_detector_24 [2024/04/11 21:05] – [Main Problem] tdeyoung | 184_projects:metal_detector_24 [2024/04/12 18:11] (current) – [Main Problem] dmcpadden | ||
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==== Main Problem ==== | ==== Main Problem ==== | ||
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When you dug up Dr. Watersa' | When you dug up Dr. Watersa' | ||
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After eating the jellybeans the EM-boartigers became very friendly, even letting you pet them -- although you got some pretty ferocious static shocks in the process -- and then wandered away. They seem to have completely disappeared, | After eating the jellybeans the EM-boartigers became very friendly, even letting you pet them -- although you got some pretty ferocious static shocks in the process -- and then wandered away. They seem to have completely disappeared, | ||
- | Desperate, you turn to Manny for help since he's been right about everything all along. | + | Desperate, you turn to Manny for help since he's been right about everything all along. |
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You have access to a whole bunch of 12 gauge copper wire, an alternating current power supply that can produce a maximum current of 2 A and has a frequency of 60 Hz, and a voltmeter that will measure an alternating voltage. If the voltmeter measures a voltage bigger than 50 mV, it will sound an alarm. You want to design your metal detector so that if there is not a metal nearby, the voltmeter will be below the threshold; however, if there is a metal nearby, then the measured voltage on the voltmeter will be above the threshold and set off the alarm. | You have access to a whole bunch of 12 gauge copper wire, an alternating current power supply that can produce a maximum current of 2 A and has a frequency of 60 Hz, and a voltmeter that will measure an alternating voltage. If the voltmeter measures a voltage bigger than 50 mV, it will sound an alarm. You want to design your metal detector so that if there is not a metal nearby, the voltmeter will be below the threshold; however, if there is a metal nearby, then the measured voltage on the voltmeter will be above the threshold and set off the alarm. |