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<p class=MsoNormal><span class=EmailStyle15><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>I remember
reading about using two dimmers. I believe the reason for using two is to get a
more sensitive adjustment near the voltage (15) we need. I have used a single
dimmer for mane years, which worked sort of. It wouldn't turn on below about 25
v but could be adjusted down to 15 without shutting off. The cure was to load
the dimmer with a light bulb <u>connected in series</u> with the wire and
dimmer. A 300 w bulb greatly reduced the sensitivity of the dimmer. The voltage
across the light bulb is around 75 loading the dimmer to about 3/4 full on for
very broad adjustment, 150 probably would have been enough.</span></font></span><span
class=EmailStyle15><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial;color:navy;mso-color-alt:
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<p class=MsoNormal><span class=EmailStyle15><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>There is a
shock (electrocution) hazard using household current. Although I haven't tested
it I have a GFI outlet in my shop that I use. The transformer based power supplies
isolate and separate the household (primary) from the secondary output voltage
eliminating possible contact with household current. If I didn't already have a
usable power source I would just buy one (plug & play).</span></font></span><span
class=EmailStyle15><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial;color:navy;mso-color-alt:
windowtext'><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'>Jim Hiller
<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;color:black'>-----Original
Message-----<br>
<b><span style='font-weight:bold'>From:</span></b>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<b><span style='font-weight:
bold'>On Behalf Of </span></b>Paul LaChance<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, May 21, 2009 1:26
AM<br>
<b><span style='font-weight:bold'>To:</span></b> NSRCA Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> [NSRCA-discussion] Foam
cutter power supply</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Hi all,</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>I was
told about a way to make a power supply for a foam cutter using 2 dimmer
switches. I was also told to measure the final voltage to get an
approximate starting point of 15 volts. I am not getting a voltage change
with the dimmers. I have tested to see that there is a difference by
using a drill to see that it is reducing the speed. Does anyone know how
I can measure to get a starting point or is it going to be trial and
error? </span></font><font color=black><span style='color:black;
mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Thanks
in advance,</span></font><font color=black><span style='color:black;mso-color-alt:
windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 color=black
face="Times New Roman"><span style='font-size:12.0pt;color:black'> </span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black'>Paul</span></font><font
color=black><span style='color:black;mso-color-alt:windowtext'><o:p></o:p></span></font></p>
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