I searched the web for the common ground thing, but i'm not sure if i'm doing it the right way. I'm trying to get more range out of the transmitter.
Is this the right way to do this?
That looks OK to me, but be sure that the transmitter can tolerate 12V. Some can't.
Some breadboard side rails have a break in the middle, in which case you need a jumper.
jaapze:
I searched the web for the common ground thing, but i'm not sure if i'm doing it the right way. I'm trying to get more range out of the transmitter.Is this the right way to do this?
The common ground look great 
Certainly needs less than 12V, probably should be something like 5V. 
see attached
zaxarias:
The common ground look great
Certainly needs less than 12V, probably should be something like 5V.
Why does it certainly needs less than 12V, if it can hold 3,5v - 12v as you can see in the previous post.
jaapze:
zaxarias:
The common ground look great
Certainly needs less than 12V, probably should be something like 5V.Why does it certainly needs less than 12V, if it can hold 3,5v - 12v as you can see in the previous post.
Ok , just saw it...
Sorry last noob question here
So this is the right way to test the difference between 12v and 5v, i don't have to switch the common ground?
That will work, although you don't need a switch for a one-time test, nor do you need to "switch" the common ground.
Do you have 17 cm antennas (straight wire, pointing up) attached to the ANT terminal of both transmitter and receiver? If not, that will make a huge difference.
I read in an instructable that the Tx antenna should be 20 cm COILED.