I want to read a battery voltage so I can measure the remaining capacity (based on the battery voltage drop). The battery is closer to 5V than 3.3V.
I’ve been told I can use a circuit like this to drop the 5V to 3.3V without having to worry about small current changes. This is different than the other solutions I’ve seen which don’t seem to address the varying current issue.
That’s a 5.1K resistor on the top, a 10K resistor and 1uF cap on the bottom. And I realize this isn’t really NETMF specific, but I figure a lot of software guys like me could use this hardware trick (if it works).