Mailing List lml@lancaironline.net Message #21316
From: ian crowe <ian.crowe@sympatico.ca>
Sender: Marvin Kaye <marv@lancaironline.net>
Subject: Ohm's law
Date: Wed, 05 Nov 2003 10:51:11 -0500
To: <lml@lancaironline.net>
Can one of you erudite gentleman help a poor mechanical man?
 
I have an low voltage light that is too bright.  At night when I lower the gear it tends to flash and upset my night vision.  Right now the bulb is out of it, which is good for the vision and bad for the warning!  I would like to dim that bulb.
 
How do I go about calculating the value of the series resistance in ohms required and the wattage of the resistance?  I used to be able to do this at high school but a lot of years have intervened and I forget.  I can measure the resistance of the bulb, the voltage is 12volts and where do I go from there?
 
Thanks
 
Ian Crowe
C-FKRO
LC2 90 odd hours and counting
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