<div dir="ltr">huh ?<div><br></div><div>I don't get it, but I should.</div><div><br></div><div>this is embarrassing...<br></div><div>I REALLY should get it...</div><div>I used to test active load components for ATE,</div><div>which are essentially diode bridges</div><div><br></div><div>can you post a sketch ? with waveforms ?</div><div><br></div><div>is this a trick to control (dim) an AC load using a DC dimmer ?</div><div><div><br></div></div><div>I guess AC flowing from power to load through the bridge will attempt to produce</div><div>rectified but unfiltered DC at rectifier + and - terminals,</div><div>but biasing this with DC from a DC-controlling dimmer will </div><div>alter the conductivity paths.. some of the AC will flow to the load,</div><div>some to the DC, depending on voltage...</div><div><br></div><div>is your use of the word "floating" actually critically important,</div><div>meaning the AC source and the DC circuitry cannot have a common ground,</div><div>or magic smoke may be released ?</div><div><br></div><div>am I guessing correctly ? sort of ?<br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jul 2, 2015 at 8:19 PM, Jerry Durand via Stagecraft <span dir="ltr"><<a href="mailto:stagecraft@theatrical.net" target="_blank">stagecraft@theatrical.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
May not work for this application, but I'll let out a trick on AC
loads.<br>
<br>
Assuming you don't mind a little voltage drop AND you have a
floating dimmer or AC source...<br>
<br>
Split one wire going to the load, hook the power source to one ~
terminal of a bridge rectifier and the load to the other ~ terminal.<br>
<br>
Hook the - lead of the bridge to the dimmer ground and hook the +
from the bridge to the dimmer output. This assumes an NPN type of
dimer, if you have a PNP type then you may have to swap wires
around.<div><div class="h5"><br>
<br>
<div>On 07/02/2015 04:24 PM, Lyric Opera
Kansas City via Stagecraft wrote:<br>
</div>
</div></div><blockquote type="cite"><div><div class="h5">Hello Everyone,
<div><br>
</div>
<div>I recently posted about dimming a 24v load which many
probably assumed would be a 24v DC load as I did. I found out
that it is a 24vac load. They are tiny incandescent lights. I
will be pulling about 9.5A at 24vac. I thought I had secured a
magnetic transformer that I could use to dim these lights, but
it fell through. Anyone know where I could get something that
would work for this application? I am not sure if there are any
other products that I could get my hands on to do the trick.</div>
<div><br>
</div>
<div>Thanks,</div>
<div><br>
</div>
<div>Nate</div>
<br>
<fieldset></fieldset>
<br>
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<pre cols="72">--
Jerry Durand, Durand Interstellar, Inc. <a href="http://www.interstellar.com" target="_blank">www.interstellar.com</a>
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