OKay, I admit…My hardware skills are not up to the same level as my software skills, so forgive the newbie questions…
I have a question about the 5v pin on the gadgeteer socket… Is it truly supposed to be 5v?
Im trying to use that pin to power a custom module with some other 5v modules on it. I was noticing some strange behavior, so I took a voltmeter to it.
I am using a benchtop supply to provide exactly 5.00v to the usb connector of a USB DP power module.
If I measure the 5v pin directly from the gadgeteer socket on the DP module, it is 4.993 volts.
Okay, close enough, I guess
When I connect this to the D socket on my Raptor (or Hydra) then connect a breakout module to a cable and plug it into any other socket, then measure the voltage, I get something like 4.662 volts.
If I connect another random module to one of the other sockets (led, flash module, wifi module, etc) when I plug one in, the 5v pin drops to 4.53v then another module plugged in, and the 5v pin drops to 4,43v , and so on (each new module drops the voltage)
The 3.3v pin, however stays at 3.317v
"haha, silly software guy, this is normal, 5v is never really 5v, deal with it"
"dummy, look at the schematic, you are getting that result because of (some hardware secret here"
"dude - you got a bad USB DP power module, return it for a replacement:"?