GPS Reciever- GP-20U7 not being powered by external power source

GPS/GNSS Development Boards
1

Hi,

I have been using a Sparkfun GP-20U7 GPS receiver wired to an Arduino Uno and have been powering the GPS from the Arduino. The receiver/program was working and I could see readings on my computer from the GPS, however, when I switched the power source for the GPS to an external 3.3 V power source, I am unable to see readings from the GPS on my serial monitor in the Arduino software. When I measured the current/voltage draw of the GPS with a multimeter, the readings were consistent for both the USB and the external power source.

If anyone has any suggestions on what to do I’d really appreciate it if you could let me know.

Thanks.

2

Hello Wookycooky,

Can you provide more information on the external power source and a wiring diagram of your current setup?