X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Date: Fri, 16 Mar 2012 13:58:36 -0400 (EDT) From: GENE GLICK Subject: Re: [geda-user] Daughter's Science Fair X-Originating-IP: [12.139.224.82] To: geda-user AT delorie DOT com Cc: geda-user AT delorie DOT com Message-id: <81086e.ffa0.1361ca943e5.Webtop.22@optonline.net> MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_gGlvFuE83qFPa+mnDnATiw)" X-SID: 22 X-Authuserid: geneglick AT optonline DOT net User-Agent: Laszlo Mail 3 Reply-To: geda-user AT delorie DOT com --Boundary_(ID_gGlvFuE83qFPa+mnDnATiw) Content-type: text/plain; charset=UTF-8; format=flowed Content-transfer-encoding: 7BIT Content-disposition: inline On Fri, Mar 16, 2012 at 11:33 AM, Rob Butts wrote: So if I use a 1 watt 15k ohm resistor in series with the nail and an ac outlet that will give me 8ma alternating current and that should light the bulb? I don't think UL would approve :) Also, you don't want to endanger the kids. But - if you energize one coil with a DC source, then *move* the other coil around, you should get something to happen. Maybe a light bulb, or maybe a current meter would show the affect. In fact, if you have time to build a little turntable, somehow allowing the kids to spin the second coil - that should also work. Faster spins = brighter lights, or higher current readings - make a game out of it :) gene --Boundary_(ID_gGlvFuE83qFPa+mnDnATiw) Content-type: text/html; charset=UTF-8 Content-transfer-encoding: quoted-printable Content-disposition: inline

On Fri, Mar 16, 2012 at 1= 1:33 AM, Rob Butts wrote:

So if I use a 1 watt 15k ohm resisto= r in series with the nail and an ac outlet that will give me 8ma alternatin= g current and that should light the bulb?

I don't think UL would approve :) A= lso, you don't want to endanger the kids. But - if you energize one c= oil with a DC source, then *move* the other coil around, you should get som= ething to happen. Maybe a light bulb, or maybe a current meter would = show the affect. In fact, if you have time to build a little turntabl= e, somehow allowing the kids to spin the second coil - that should also wor= k. Faster spins =3D brighter lights, or higher current readings - mak= e a game out of it :)

gene

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