Best way to measure 0-230 volt with a stamp.
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I need to get hold of the voltage delivered from a powerful
aggregate (that produce current)
And read it with a BS2p.
One way is to use a 6volt transformation, and a diode, then use an
ad-converter to read the voltage. This means a lot of calibration.
Some other ideas do this?
Stein
aggregate (that produce current)
And read it with a BS2p.
One way is to use a 6volt transformation, and a diode, then use an
ad-converter to read the voltage. This means a lot of calibration.
Some other ideas do this?
Stein
Comments
RS232 capability. I can send you a link if you want.
But what is your problem with calibration? Once calibrated it should
be stable.
How precise do you want to measure (that is, 204.379 volds)?
Russ
--- In basicstamps@yahoogroups.com,
Calibration = Accuracy. How accurate do you need to be?
I routinely measure 500 VDC from a Plasma System Power supply. They are very
noisy 200KW SCR Power Supplies.
The AVC-1 uses a voltage divider with filtering, and a 12 bit A/D Converter.
It takes 1 pot setting to calibrate the system. I only need 1 volt accuracy,
so a 12 bit A/D is overkill, but it is cheap and only takes 3 pins (2 are
shared).
Calculate your highest possible voltage and use Ohms law to make a divider
that allows 4 volts to be fed into the A/D. I buffer it through a unity gain op
amp. You need to determine the filtering needed as I do not know what type
voltage a powerful aggregate produces.
Hope this helps
Alan Bradford
Plasma Technologies
www.plasmatechnologies.com
In a message dated 3/5/2004 5:53:19 PM Eastern Standard Time,
Stein_Frostad@m... writes:
I need to get hold of the voltage delivered from a powerful
aggregate (that produce current)
And read it with a BS2p.
One way is to use a 6volt transformation, and a diode, then use an
ad-converter to read the voltage. This means a lot of calibration.
Some other ideas do this?
Stein
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