[dorkbotnyc-blabber] Circuit Help

[Alexander Makenzie]

Chris

Please send a drawing. I'm the type that needs to have a clear picture  
of it! a little slow on the circuit side...
 From what I was told it remains 12vdc

Best
alex
On May 28, 2008, at 1:11 PM, Chris Vecchio wrote:

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