[dorkbotnyc-blabber] voltage differences: powering a 9-volt thing with a wall socket powered device

[August Huber]

Relays?

--

     august huber <gus at pbx.org>
     pbx labs (+1.212.464.7306)

On Dec 21, 2007, at 9:27 AM, Jascha Narveson <jnarveson at wesleyan.edu>  
wrote:

>
> Hello, Dorkbot -
>
> Quick question:  i've got a 9-volt battery powered circuit which I  
> want to power with an off-the-shelf turn-the-lights-on-when-the-bad- 
> guy-gets-near-your-house motion sensor.  The sensor runs off normal  
> 110 AC power, and I'm not sure what kind of power it's feeding to  
> the light bulbs, but it's higher than 9 volts.  Is there an easy way  
> to change the output of the sensor to safely power the circuit?
>
> thanks,
>
> jascha
> ... 
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