Originally Posted by rgleason
So instead of the USB hub you're planning on using some pins on the Raspberry Pi for the signal? Does this save power too? But first you need to power the AIS
at 3.3vdc? I thought the GPS puck
required 5 vdc? Would love to see a diagram when you get there. I recently made a 5vdc Power Supply for the puck
gps and wired it to send nmea
to VHF/DSC which is a similar problem. Could I have used 3.3vdc?
Not sure how much power the 2 x usb/serial converters use, probably not much. On my setup gps comes from a garmin128 & ais
from a nasa ais engine
, so they both have their own power @ 12v already. The 3.3v is what the gpio pins on the Pi use, so you can't directly connect nmea
from a gps, too high a voltage, you need to convert from serial
voltage to 3.3v or probably blow the Pi. If you have a puck then sticking to USB might make more sense. I had trouble the other night with the gps input jumping to different UBS ports
, there are ways round this apparently, but I really don't know my way around the insides of linux
yet to sort it out.
Doesn't gpsd do this for you?