Hi,
Let's say that I rectify 120VAC from the grid. That would be like 170VDC at the output. How can I measure that voltage so a microcontroller can process that information? I've seen that sometimes resistors dividers are used. So, with a resistor divider, can I convert the 160VDC to 0-3.3V , and use an ADC from the MCU? Right?
The reason why I'm asking this is because I read from an App Note (fragment attached) that voltage measurement can replace an speed sensor as feedback mechanism in PMDC motor control. Is that good idea?
Let's say that I rectify 120VAC from the grid. That would be like 170VDC at the output. How can I measure that voltage so a microcontroller can process that information? I've seen that sometimes resistors dividers are used. So, with a resistor divider, can I convert the 160VDC to 0-3.3V , and use an ADC from the MCU? Right?
The reason why I'm asking this is because I read from an App Note (fragment attached) that voltage measurement can replace an speed sensor as feedback mechanism in PMDC motor control. Is that good idea?
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