Re: Using a Panel Meter movement

Phil Allison wrote:
"ehsjr"


The meter is driven by current. The voltage level powering
a microprocessor will be fine, but the current *must* be
limited to less than 100 ua, per the page you posted.

Assuming a 5 volt supply, you can use a 2 meg resistor in
series to limit the current to no more than 50 uA to give
yourself a wide safety margin when testing the meter.


** Huh ???

100k is the value needed.



...... Phil

Perhaps that's in case the 5 volt supply should suddenly spike to 40V?

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

Do you need to implement control loops in software?
"Applied Control Theory for Embedded Systems" gives you just what it says.
See details at http://www.wescottdesign.com/actfes/actfes.html
.

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