Help soldering a spektrum 4649t

[Chrome Dome]

I am having trouble soldering a spektrum 4649t serial rd to a sp racing f3 deluxe fc. I have it all wired to uart3 but the rx will not power up. This rx requires 5volts. Is uart3 5volts? I do not have a multimeter to test


Sent from my SAMSUNG-SM-G891A using Tapatalk

 

[John Doecliff]

The simple answer is to get a multimeter and make sure.

 

[Chrome Dome]

Sp to clarify.. you don't know but had to state the obvious.

Sent from my SAMSUNG-SM-G891A using Tapatalk

 

[DroneTalk]

It's nearly impossible to do any work on a PC board without a multimeter , double checking is always best don't with the right tools, sometimes the obvious answers is the right only one. But a pic might help.