Russell McMahon ha scritto:
> - Aim is to detect that mains is within desired voltage range.
> 
> - Transformer secondary output is available.
> 
> - Use of PIC ADC as means of measurement is desired.
> 
> - Absolute minimum of hardware desired.
> 
> - Various peak detection and waveform magnitude measurement systems have
> been described.
> 
> - Connection of transformer secondary to Vdd with resistor divider to PIC
> pin was suggested (by me) giving always +ve signal always between Vdd-Vss
> and 2 resistors total (and maybe smoothing cap.
> 
> - Effects of noise etc were commented on along the way.
> 
> - Current hardware seems slightly inferior to and more complex than my 2
> resistor suggestion. Reason for not using my suggestion is unknown.


very good resume :) Russell, thank you :)
I'll consider the "full-positive, go VDD" approach later...
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