Help with installing arduino on a rc car

[haggai shapira]

hello, extreme newb with electronics here. im trying to hook up my arduino to an RC car that has this circuit (attached photo). following instructions from this link http://www.instructables.com/id/Autonomous-Control-of-RC-Car-Using-Arduino/
my questions:
1. is the "ground" where it says "V+"?
2. am i supposed to connect wires from the arduino to where it says R/L/F/B? (cause that doesnt work so far) and if not, where then?

what ive done so far:
- tested the arduino for basic functioning (works)
- removed the receiver from the circuit as appears in the photo and instructed in the link.
- i tried connecting (by iron soldering) a wire to where it says R and the other side to port 7 (random) in the arduino and configuring it to send a pulse, but it doesnt do anything.

any sort of help would be appreciated!

 

[haggai shapira]

hello, extreme newb with electronics here. im trying to hook up my arduino to an RC car that has this circuit (attached photo). following instructions from this link http://www.instructables.com/id/Autonomous-Control-of-RC-Car-Using-Arduino/
my questions:
1. is the "ground" where it says "V+"?
2. am i supposed to connect wires from the arduino to where it says R/L/F/B? (cause that doesnt work so far) and if not, where then?

what ive done so far:
- tested the arduino for basic functioning (works)
- removed the receiver from the circuit as appears in the photo and instructed in the link.
- i tried connecting (by iron soldering) a wire to where it says R and the other side to port 7 (random) in the arduino and configuring it to send a pulse, but it doesnt do anything.

any sort of help would be appreciated!

 

[Bluejets]

When adding Arduino to another circuit, most times it is common practice to connect the ground wiring in a star arrangement which in most instances would be the V-. (Not the V+)

A quick glance through some Arduino tutorials would tell you this.

Without an actual circuit, only other alternative would be for me to trudge through the entire project which I do not intend to do.