This circuit will flash turn signal LEDs on your scale vehicle. You can connect it to a spare channel or feed it the steering servo signal.
You can choose from normally on turn signal lights or normally off turn signal lights. Just cut the orange wire to go to the other mode! Please insulate the wire ends so nothing bad can happen.
If you have a three-position channel you can connect it to this controller and leave your steering servo plugged into the receiver as normal. Then you can operate the turn signals manually. For automatic operation, just plug the controller in between the receiver and steering servo.