..D.E wrote:
I'm looking to add a mod to my pinball machine with a couple of led's and
need to drop 6 volts dc down to 4.5 volts dc. Can anyone suggest which
resistor to use?

Thanks.

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_____________________________
Later.
Have a better one.
D.E.
To email me back, remove "forget.the.spam"

If I understand your question correctly, most people makes voltage
regulators out of Zener diodes. However, I suppose you could make a
voltage regulator using a couple of LEDs although it probably wouldn't
be as accurate.

For information on how to do this look at instructions for doing it
with a Zener and then simply adapt them for using LEDs instead. For
information on making a regulator using a Zener, type in ZENER VOLTAGE
REGULATOR in Google. Here's a couple of examples:

http://www.allaboutcircuits.com/vol_6/chpt_5/7.html
http://www.ycmou.com/st/Download/ALM...r%20ze ner%22