<br>It's weird that there's no current spec for the open collector output.<br><br>A relay should do the trick however and you're right that you will <br>need a diode to protect the PIR sensor from the relay's inductive kick.<br><br>I can send you a schematic of how to do it if you want.<br>
<br> - Chris<br><br>
<table class="readtext" border="0" cellpadding="1" cellspacing="7"><tbody><tr><td bgcolor="#789be0"><div style="width: 1px;"> </div><br></td><td>-------Original Message-------<br>
From: Alexander Makenzie <alex.makenzie@gmail.com><br>
Subject: [dorkbotnyc-blabber] Circuit Help<br>
Sent: 28 May '08 16:54<br>
<br>
Hello<br>
<br>
I am trying to figure out how to make this PIR sensor work that I just <br>
bought with another component I need to use.<br>
<br>
data sheet:<br>
<a href="http://www.electronics123.net/amazon/datasheet/kc7786.pdf" mce_href="http://www.electronics123.net/amazon/datasheet/kc7786.pdf" target="_blank" style="text-decoration: underline;">http://www.electronics123.net/amazon/datasheet/kc7786.pdf</a><br>
<br>
Basically, I light electroluminescent panels with these special high <br>
frequency transformers, they run on 12vdc. I have been running them <br>
using this 12vdc wall transformer, it is regulated a 1 amp with no <br>
problem. However when I connect the PIR sensor the output voltage <br>
becomes 12vdc at .2 amps and this is too low to drive the transformer <br>
and therefore won't turn the light on.<br>
<br>
So, I need the slightest boost. It has been suggested to me to use a <br>
relay. This is where my confusion begins. I have been reading about <br>
them, I understand the premise, but I only need a slight bump up of <br>
the amperage not voltage.<br>
<br>
I have also been advised that due to the sensitivity of this PIR <br>
circuit I'll need to protect it from the electro magnetic pulse <br>
discharged from the relay when switching off.<br>
<br>
Can anyone help me here?<br>
<br>
Thank You!<br>
Alex<br>
<br>
--<br>
<br>
www.alexmakenzie.com<br>
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</alex.makenzie@gmail.com></td></tr></tbody></table>