I’m trying to figure out the absolute ratings for externally powering my FEZ. I’ve found the following values:
[ulist]Manual says the external connector accepts 6-9 volts.
Board writing says the external connector accepts 6-9 volts.
Manual says the [italic]Vin[/italic] pin accepts 6-12 volts.[/ulist]
Now I measured the voltage on [italic]Vin[/italic] with an 8.4 volt battery connected to the external connector, and I was able to measure 8.4 volts between [italic]Vin[/italic] and [italic]GND[/italic]. This seems to indicate that [italic]Vin[/italic] and the external connector are connected somehow, which confuses me a bit as their ratings are different.
What I’m looking to use as external power is an 11.1 volt LiPo battery, and I want to know why I have to connect it to [italic]Vin[/italic] and can’t just use the external connector?
Here’s the manual: