|
Yes, 60 Hz. I would expect the capacitor to
remain at some steady state voltage, somewhere around 1.5V. I don't have
access to an oscillosope at home.
Jim
Not
at all off-topic.
I'm no expert, but the schematic is at
http://www.hobby-boards.com/catalog/links/hvac2-r1/HVAC%20Monitor%20v2.0%20Schematic.pdf
With
1M resitor and 1uF capacitor, the time constant is 1 second. What is the
frequency of your AC? 60Hz?
Paul Alfille
On 6/7/06, Jim Duda
<[EMAIL PROTECTED]> wrote:
I
apologize if this is off topic, since owfs seems to handle DS2450
just
fine, as best I can surmise.
I purchased a "HVAC Monitor Kit"
from Hobby Boards. The description of
the board states that it
can measure any voltage up to 28V AC or DC.
The design has a diode and a
resistive voltage divider (100K/1M) on the
front-end of the DS2450
voltage inputs.
For the signal I want to monitor, my DVM measures 15V
AC at the terminal
lug of the HVAC Monitor. However, via owfs
HTTP, I see various voltages
between 240 mV and 1.5V, seems to be all
over the place, like maybe a
sinusoid :-)
Can anyone offer any
tips on how I might measure an AC voltage with
this
thing?
Jim
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