I'm not so good when it comes the analogue end of electronics. My microcontroller has 0-3v inputs and I'm trying to get together a range conditioning circuits.
I know this I a reasonably broad question as the analogue design will depend on a lot of other factors, but are there any reference designs around for the following:
Analogue 0-3 volt
Now there'll need to be some over voltage protection and something for voltage spikes, but will that do?
Analogue 0-30 volt
Can I just use a resistor divider with some 1% resistors and hope for the best?
Digital 0-x volts
I guess here I'd be best to use an 'opto' based device that supports the required frequency?