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Trouble hooking up parallax 2 axis joy stick — Parallax Forums

Trouble hooking up parallax 2 axis joy stick

wickednickwickednick Posts: 2
edited 2012-07-22 08:04 in General Discussion
Hi, I'm wondering if anyone could help me with a project I'm working on. I'm building a atari punk synth out of two 555 timers and I want to use joy sticks emplace of the normal potentiometers found on these things. I've tried hooking up the joy stick and it does work, but I can only get half of the joy stick to do anything; meaning that only up and right axis controls work. I have both of the positive and ground terminals connected to their expected places on the breadboard and have the L/R, U/D terminals hooked up to the correct pin on the 555 chip.

I've most often seen the joystick used with arduinos and other programmed circuits so I'm wondering if this can only be used with those kind of circuits. Also why does the joystick have more than two L/R, U/D? Most often i've only seen one side hooked up. I've tried wiring up the joystick in different ways, but I can only still get half of it to work.

Comments

  • GordonMcCombGordonMcComb Posts: 3,366
    edited 2012-07-21 19:03
    The grounds for the two potentiometers are internally connected in the joystick, but not the + pins. Be sure both U/D+ and L/R+ are connected to the positive supply.

    The extra outputs for L/R and U/D are just for convenience in breadboarding. Like the ground pins, they are internally connected.

    -- Gordon
  • wickednickwickednick Posts: 2
    edited 2012-07-22 03:56
    Yeah the positive pins are hooked up to the power supply, still only half of it works. Up and right are the only directions that work and it seems like only two of the L/R, U/D pins will do anything,when I try the other two nothing happens.Could this thing be broke?
  • GordonMcCombGordonMcComb Posts: 3,366
    edited 2012-07-22 08:04
    Remove the joystick from the circuit and try using your multimeter to test both pots. Verify their proper operation as you would any potentiometer.

    -- Gordon
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