I'd say this forum isn't a bad one :). 1-2 day response time could be optimistic or conservative depending on your question!<div><br></div><div>Do you need the peltier to be able to be heated and cooled? If this is a requirement, you want to use an H-bridge instead of a relay. An H-bridge will let you flip the polarity of the DC current, thus being able to flip which side of your peltier is hot or cold. Also, an H-bridge is a way to sort of PWM big power stuff...without the pulsing. So, if you want control to be adjustable, you should really use an H-bridge. The relay will just get you off or on.†</div>

<div><br></div><div>Hope that helps!</div><div>Sean<br><br><div class="gmail_quote">On Thu, Aug 16, 2012 at 1:49 AM, Frantisek Apfelbeck <span dir="ltr"><<a href="mailto:algoldor@yahoo.com" target="_blank">algoldor@yahoo.com</a>></span> wrote:<br>

<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-size:12pt;font-family:bookman old style,new york,times,serif"><div><span style="vertical-align:baseline;font-variant:normal;font-style:normal;font-size:15px;background-color:transparent;text-decoration:none;font-family:Arial;font-weight:normal">Hi to all,</span><br>


<span style="vertical-align:baseline;font-variant:normal;font-style:normal;font-size:15px;background-color:transparent;text-decoration:none;font-family:Arial;font-weight:normal">I
 would like to ask for a recommendations for some discus forum where I 
can ask questions related to electronics with focus on arduino 
controlled 5 V and higher voltage circuits and sensors. When I encouter some issues I would be hoping to get answers/suggestions 
preferably within one or two days. </span><br>
<span style="vertical-align:baseline;font-variant:normal;font-style:normal;font-size:15px;background-color:transparent;text-decoration:none;font-family:Arial;font-weight:normal"></span><br>
<span style="vertical-align:baseline;font-variant:normal;font-style:normal;font-size:15px;background-color:transparent;text-decoration:none;font-family:Arial;font-weight:normal">Iím
 quite beginner so I have a lots of questions when Iím building the 
experimental incubator, so now Iím for example looking for a type of relay which
 I could directly switch on by arduino (5v DC) and it would be strong 
enough to switch on off peltier device of +- 100W (power coming from PSU
 300W so 12v DC). This is just one of many things which I need to find out and 
sometimes searching for the solutions by myself takes just ages.</span><br>
<span style="vertical-align:baseline;font-variant:normal;font-style:normal;font-size:15px;background-color:transparent;text-decoration:none;font-family:Arial;font-weight:normal"></span><br>
<span style="vertical-align:baseline;font-variant:normal;font-style:normal;font-size:15px;background-color:transparent;text-decoration:none;font-family:Arial;font-weight:normal">Many thanks,</span><br>
<span style="vertical-align:baseline;font-variant:normal;font-style:normal;font-size:15px;background-color:transparent;text-decoration:none;font-family:Arial;font-weight:normal"></span><br>
<span style="vertical-align:baseline;font-variant:normal;font-style:normal;font-size:15px;background-color:transparent;text-decoration:none;font-family:Arial;font-weight:normal">Sincerely,</span><br>
</div><div>†</div>Frantisek Algoldor Apfelbeck<br><div><br></div><div>PS This may be answer to the question but I would rather like to confirm it<br></div><div><br></div><div><a href="http://www.amazon.com/AGT-Power-Relay-250VAC-Type/dp/B008G1HLRA/ref=sr_1_1?ie=UTF8&qid=1345106766&sr=8-1&keywords=5v+dc+relay" target="_blank">http://www.amazon.com/AGT-Power-Relay-250VAC-Type/dp/B008G1HLRA/ref=sr_1_1?ie=UTF8&qid=1345106766&sr=8-1&keywords=5v+dc+relay</a><br>

</div><div><br></div><div>biotechnologist&kvasir and hacker</div><br><br><div><a href="http://www.frantisekapfelbeck.org" target="_blank">http://www.frantisekapfelbeck.org</a></div><div><br><br></div><div>"There is no way to peace, peace is the way." Ghandi<br>

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<br></blockquote></div><br></div>