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→5V supply
**what is the voltage across the input to the voltage regulator?
**what is the voltage across the output from the voltage regulator?
**how much current is flowing through the bulb? according to the datasheet [http://www.jameco.com/Jameco/Products/ProdDS/210008.pdfdatasheet] how much current should be flowing through itthe bulb draw?
=== bulb circuits===
