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

[Jascha Narveson]

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