getting smaller voltage from BOEBOT board.
I need to get some voltage from my boebot board to drive the backlight on an LCD.· It can take 3.0 to 3.6V.· Do I just get a voltage regulator and put it on the prototyping board.· From searching google, it seems the way to go.· Opinions?
THANKS
THANKS
Comments
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Chris Savage
Parallax Tech Support
csavage@parallax.com
According to the data sheet.·[url=mailto:60mA@3.6V]60mA@3.6V[/url]· ·(5.0V-3.3v)/.06A= 28 Ohms· Didn't understand that until just now....
So a 28 Ohm resistor would work?· Any advice, for my own learning, as to the benefits of a regulator vrs a resistor?· Or is that in effect what a regulator is.·
If you care...
Blue White option http://www.stegen.com/pdf/LCD-module_dip204-4e.pdf?osCsid=899933491644294b6f20df11bff8a94b
Post Edited (neoteric) : 3/10/2006 4:07:06 PM GMT
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·1+1=10
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Chris Savage
Parallax Tech Support
csavage@parallax.com
Thanks all
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·1+1=10
Jonathan
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www.madlabs.info - Home of the Hydrogen Fuel Cell Robot
·· Paul suggested that very thing.· If he has a 3.3 that would be great, otherwise I still think the resistor is the way to go.· After all, that's how most of them are handled anyway when they have on-board connections for the backlight.· The advantage of the user powering it is that they can implement brightness and on/off control.
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Chris Savage
Parallax Tech Support
csavage@parallax.com
You don't need the regulator to make it adjustable. You can wire the pot in between the resistor and the backlight. This would limit max voltage by the 28 ohm resistor. the pot would then add more resistance. thus the backlight would be dimmed by turning the pot.
mike
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·1+1=10