I have made an rf controlled robot with Arduino and I used one Arduino and that is for the transmitter,
and receiver circuit same as the original and it is connected to the motor driver,
the problem is in transmitter circuit for encoder ic I have to give ground as a signal so that the receiver decodes it.
using Arduino how can I give GND as a signal, it is working with one pin of input pins of decoder ic, if I connect another pin the motor is not working
can anyone help with this???