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Electronics Question (arduino)

ballyrick

Hey guys.

 

I am making a toy car with speed control, automatic door, steering and lights.

All of these (3 switches & 2 potentiometer) will be controlled by a remote connected via cable. I would like to use either a USB or RJ11 (4-core telephone) cable.

My question is can I combine all the signal cables to reduce the number of wires going from remote to Arduino.

I thought of i2c but not sure if it will work or how to implement it.

 

Thanks.

 

 

FunctionInputOutput
steering:PotentiometerServo
Automatic doorButtonservo
lightsButtonLED's
Speed controlPotentiometerMotor
Motor DirectionSwitchMotor
Parents

  • Did you buy the ATTINY yet?

    Hopefully not, if you did no biggy you're only out a couple of bucks and you'll use it someday.

     

    However if you look on eBay for "Arduino Mini" there's a small micro controller Arduino with much more I/O and is available for about 5-8 bucks U.S. it would be easier to integrate and has all the I/O you'd need in your controller without having to do some high level programming.

     

    It's a cheap Chinese knockoff but it's fully compatable.

     

    Then the basic idea is to program the mini in the loop to monitor the current values of each input and create either a String or if you're comfortable with it a Byte array where you would add each value from each input. Separate the string values with like a carriage return char so you can parse them later easier. Then after you've built the string send it down to the other Arduino in the car serially and parse through the string applying each value to their respective outputs. 

     

    I'd put a delay of 5-10 ms after that before looping again to ensure the Uno is finished before the buffer is hit again with another packet.

     

    Congrats you've just design and hopefully programmed a protocol.

  • in reply to timryder

    Totally agree with the Arduino Mini, Good shout. image

    You can also use the Arduino Nano, with a built-in USB interface.

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