Re: Looking for ways to measure AC line voltage with a uP.

From: "Robert Lacoste" <see-my-email-at@xxxxxxxxxxxxxx>
Date: Tue, 28 Nov 2006 09:02:24 +0100

"Donald" <Donald@xxxxxxxxxxxxxxxx> a écrit dans le message de news:
gbednYjt7vdBtPrYnZ2dnUVZ_sednZ2d@xxxxxxxxxxxxxx

Looking for ways to measure AC line voltage with a uP.

The uP would connect to a PC serial port.

Also measuring AC line current would be useful.

thank you

donald

Have a look at www.cypress.com, in the applications notes for the PSoC's
devices. As far as I remember there is a design for a PSoC-based wattmeter.

Friendly,
Robert
www.alciom.com

.

References:
- Looking for ways to measure AC line voltage with a uP.
  - From: Donald

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Re: Looking for ways to measure AC line voltage with a uP
... The uP would connect to a PC serial port. ... This was for the load control system at Holden ... I already have a micro with RS-485 measuring temperature. ...
(sci.electronics.design)
Re: Looking for ways to measure AC line voltage with a uP
... Donald wrote: ... The uP would connect to a PC serial port. ... Also measuring AC line current would be useful. ... the peaks. ...
(sci.electronics.design)
Re: Looking for ways to measure AC line voltage with a uP
... Donald wrote: ... The uP would connect to a PC serial port. ... Also measuring AC line current would be useful. ... How about a DMM with an RS-232 port? ...
(sci.electronics.design)
Re: Looking for ways to measure AC line voltage with a uP
... The uP would connect to a PC serial port. ... Also measuring AC line current would be useful. ... This was for the load control system at Holden ...
(sci.electronics.design)
Re: Looking for ways to measure AC line voltage with a uP.
... Donald wrote: ... One basic method would be to get a reduced-size version of the waveform, then either rectify it and sample it with an ADC, run it through a true RMS chip and sample it with an ADC, or sample it fast enough with an ADC that you can calculate RMS in the microprocessor. ... You'll need to be isolated, so you either need to have the microprocessor running on the "hot" side and isolate it's communications from the PC, or you need to isolate the AC while getting an accurate copy. ... I can run a RS-485 to the site, but measuring the AC side is where I am having to be creative. ...
(comp.arch.embedded)