I made car using (Arduino Uno, relay 4 module, Bluetooth module and 2 DC motors). I am using 2 (9volts) batteries, one for the arduino and the other one for the motors, but now both are (8.8 volts). The problem now is when I connect all components the relay doesn't work. I have attached the code a…

Car using arduino uno and relay 4 module

amabdelhady April 21, 2017, 7:07pm 5

Thanks a lot for helping.

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