25387 1728 Technology Science & Technology Projects true Wed, 13 Aug 2008 06:00:54 -0700 /system/videos/5/87/53/02/25387.flv /system/videos/5/87/53/02/25387_hd.flv technology, making, make, projects, metal, detector, finding, coins, metals, money How To Make a Metal Detector http://www.howcast.com/videos/25387-How-To-Make-a-Metal-Detector http://www.howcast.com/videos/25387-How-To-Make-a-Metal-Detector/edit approved 126 640 360 <object width="425" height="273" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" id="howcastplayer"><param name="movie" value="http://www.howcast.com/flash/howcast_player.swf?file=25387"></param><param name="allowFullScreen" value="true"></param><param name="allowScriptAccess" value="always"></param><embed src="http://www.howcast.com/flash/howcast_player.swf?file=25387" type="application/x-shockwave-flash" width="425" height="273" allowFullScreen="true" allowScriptAccess="always" ></embed></object> 62 Kipkay http://img.howcast.com/system/thumbnails/25387/metal_detector_hd_2_xxlarge_maintained_aspect.jpg 53708 false false false 43727 1 20 Step http://img.howcast.com/system/thumbnails/25387/20.jpg Disassemble the CD case Carefully disassemble the CD case by removing the insert that holds the CD in place.

]]> 43728 2 27 Step http://img.howcast.com/system/thumbnails/25387/27.jpg Cut Velcro pieces On your radio, measure out an area centered on the back of the radio. Then cut a hook and loop piece of Velcro the same size.

]]> 43729 3 36 Step http://img.howcast.com/system/thumbnails/25387/36.jpg Mount the radio Stick one side of the Velcro to the back of the radio, and stick the other piece of Velcro to one side of the CD case. Then mount the radio.

]]> 43730 4 47 Step http://img.howcast.com/system/thumbnails/25387/47.jpg Mount the calculator Repeat the same process with the calculator, and apply the Velcro to the other side of the CD case. Then mount the calculator.

]]> 43731 5 57 Step http://img.howcast.com/system/thumbnails/25387/57.jpg Set radio Make sure the radio is set to the AM band and turn it on. Now tune it on to the highest end of the AM band, but not directly at a broadcast station. Turn the volume up and all you should hear is static.

]]> 43732 6 69 Tip If there is a broadcast station at the very high end of the AM band, get as close as you can so you’re just hearing static.

]]> 43733 7 77 Step http://img.howcast.com/system/thumbnails/25387/77.jpg Fold CD case With the calculator on, start folding the CD case until you hear a loud tone. That tone is the electronic circuit in the calculator. It’s producing a radio frequency signal that the AM radio is picking up.

]]> 43734 8 92 Step http://img.howcast.com/system/thumbnails/25387/92.jpg Move toward metal object Now slowly open up the case again until you can barely hear the loud tone. Then start moving your radio and calculator close to a metal object, and you’re hear the loud tone again. Now the next time you drop something valuable, get your homemade metal detector and find it!

]]> 43735 9 111 Fact In 1881, Alexander Graham Bell used one of the first metal detectors to try and locate a bullet in President James Garfield’s chest. He was unsuccessful because the metal bed Garfield was on confused the detector.

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http://img.howcast.com/system/thumbnails/1130/ppn_fiorita_trip_wire_sd_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/1130-How-To-Make-a-Trip-Wire-Alarm 1728 2941 How To Create a Baby-Headed Dancing Frog HowcastGuide 19342 Mon, 07 Apr 2008 15:06:26 -0700 23 cognitivefilms ]]> 130 http://media.howcast.com/system/videos/1/41/29/2941.flv baby, baby-headed, creating, dance, dancing, DIY, Do It Yourself, doll, Essential Skills, frog, headed, Instructional, Learn to, make, making, project, projects.create, science, tech, technology, Tips, tutorial Technology Science & Technology Projects 7 http://img.howcast.com/system/thumbnails/2941/babyfrog_lab_nobug_sd_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/2941-How-To-Create-a-BabyHeaded-Dancing-Frog 1728 2944 How To Make a Clockwork Orange HowcastGuide 6719 Mon, 07 Apr 2008 15:40:34 -0700 13 cognitivefilms ]]> 81 http://media.howcast.com/system/videos/4/44/29/2944.flv clock, clockwork, DIY, Do It Yourself, Essential Skills, experiment, Instructional, Learn to, make, making, orange, projects, science, tech, technology, Tips, tutorial Technology Science & Technology Projects 3 http://img.howcast.com/system/thumbnails/2944/FIXED_clockwork_orange_sd_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/2944-How-To-Make-a-Clockwork-Orange 1728 2945 How To Build a Giant Floor Mat Nintendo Controller HowcastGuide 6839 Mon, 07 Apr 2008 15:41:24 -0700 26 cognitivefilms ]]> 156 http://media.howcast.com/system/videos/5/45/29/2945.flv build, building, controller, DIY, Do It Yourself, Essential Skills, floor, games, giant, Instructional, Learn to, make, making, mat, nintendo, play, playing, tech, technology, Tips, tutorial, video Technology Science & Technology Projects 5 http://img.howcast.com/system/thumbnails/2945/FIXED_giant_NES_sd_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/2945-How-To-Build-a-Giant-Floor-Mat-Nintendo-Controller 1728 2947 How To Build a Laser Security System HowcastGuide 22184 Mon, 07 Apr 2008 16:39:09 -0700 41 cognitivefilms ]]> 243 http://media.howcast.com/system/videos/0/47/29/2947.flv Technology Science & Technology Projects 5 http://img.howcast.com/system/thumbnails/2947/FIXED_laser_security_sd_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/2947-How-To-Build-a-Laser-Security-System 1728 2948 How To Make a Coin Battery HowcastGuide 16094 Mon, 07 Apr 2008 16:42:23 -0700 18 cognitivefilms ]]> 120 http://media.howcast.com/system/videos/1/48/29/2948.flv battery, Coin, DIY, Do It Yourself, Essential Skills, Instructional, Learn to, make, making, project, projects, science, tech, technology, Tips, tutorial Technology Science & Technology Projects 5 http://img.howcast.com/system/thumbnails/2948/FIXED_coin_battery_sd_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/2948-How-To-Make-a-Coin-Battery 1728 4345 How To Improve Your iTrip HowcastGuide 3553 Thu, 24 Apr 2008 06:56:06 -0700 13 cognitivefilms ]]> 65 http://media.howcast.com/system/videos/5/45/43/4345.flv DIY, Do It Yourself, Essential Skills, experiment, I, i-Trip, improve, improving, Instructional, iPod, iTrip, Learn to, project, projects, science, tech, technology, Tips, trip, tutorial Technology Science & Technology Projects 2 http://img.howcast.com/system/thumbnails/4345/itrip_master_sd_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/4345-How-To-Improve-Your-iTrip 1728 181515 How To Build a Mini Hovercraft HowcastGuide 5193 Fri, 22 May 2009 04:06:30 -0700 14 ninjagoldfish ]]> 94 http://media.howcast.com/system/videos/5/15/15/18/181515.flv technology, science, projects, buidling, constructing, hovering, flying, hovercraft, toys, Gadgets Technology Science & Technology Projects 4 http://img.howcast.com/system/thumbnails/181515/mini_hover_craft_hd_2_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/181515-How-To-Build-a-Mini-Hovercraft 1728 186279 How To Make a USB Fan HowcastGuide 6542 Thu, 11 Jun 2009 04:08:04 -0700 29 vinzfeller ]]> 147 http://media.howcast.com/system/videos/2/79/62/18/186279.flv technology, making, make, projects, constructing, computers, Usb, fan, old, crafts Technology Science & Technology Projects 4 http://img.howcast.com/system/thumbnails/186279/usb_fan_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/186279-How-To-Make-a-USB-Fan 1728 186317 How To Take Online Education Classes HowcastGuide 1062 Wed, 03 Jun 2009 04:04:09 -0700 5 BajillionairesClub ]]> 122 http://media.howcast.com/system/videos/5/17/63/18/186317.flv technology, school, learning, extended, diploma, online, internet, education, classes, careers Technology Science & Technology Projects 1 http://img.howcast.com/system/thumbnails/186317/online_education_classes_1_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/186317-How-To-Take-Online-Education-Classes 1728 262687 How To Make a Fog Machine With a Household Iron HowcastGuide 8492 Sun, 11 Oct 2009 04:04:33 -0700 1 gigafide ]]> 203 http://media.howcast.com/system/videos/5/01/20/26/262001.flv technology,projects,making,creating,fog,machine,performances,concerts,theatre,productions,cheap,homemade Technology Science & Technology Projects 2 http://img.howcast.com/system/thumbnails/262687/DanielDavis_HowToMakeAFogMachine_HD_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/262687-How-To-Make-a-Fog-Machine-With-a-Household-Iron 1728 269431 How To Make a Marshmallow Gun HowcastGuide 268 Wed, 04 Nov 2009 04:06:24 -0800 2 andrewfitzgerald ]]> 129 http://media.howcast.com/system/videos/4/94/27/27/272794.flv making,crafts,projects,guns,weapons,marshmallows,homemade,home Technology Science & Technology Projects 1 http://img.howcast.com/system/thumbnails/269431/MAKE_A_MARSHMALLOW_GUN_hd_1_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/269431-How-To-Make-a-Marshmallow-Gun 1473 184032 How To Watch Digital Video Files on an Xbox 360 HowcastGuide 3415 Fri, 22 May 2009 04:06:30 -0700 5 mr_stewart ]]> 166 http://media.howcast.com/system/videos/2/32/40/18/184032.flv technology, video, game, Console, xbox, 360, watching, movies, digital, videos Technology Computer & Video Games Video Game Consoles 1 http://img.howcast.com/system/thumbnails/184032/digital_files_xbox_hd_1_xxlarge_maintained_aspect.jpg http://www.howcast.com/videos/184032-How-To-Watch-Digital-Video-Files-on-an-Xbox-360