multiple 555 servo controller

Discussion in 'The Projects Forum' started by juniormachinist, Jul 3, 2012.

  1. juniormachinist

    Thread Starter New Member

    Jul 3, 2012
    4
    0
    I'm making a robotic arm for a school project and i need a way of controlling the servos without using something like arudino or pic. i came across a 555 timer controller circuit and i can use that. Am i able to control multiple servos using one circuit or do i need to make a different circuit for each servo?
     
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,769
    969
    There are tons of 555 servo schematics..
    Here is one..
    http://www.hvlabs.com/555servo.html
    For a robotic arm you would need a circuit like this for each servo that you intend to move independently of the others.
     
  3. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
    2,802
    832
    How are you going to control your arm? Manually with a potentiometer, joystick or some other control for each servo? I ask, because I have done some robotics...
     
  4. juniormachinist

    Thread Starter New Member

    Jul 3, 2012
    4
    0
    mcgyvr so i cant say run 2 servos off one circuit?

    djsfantasi: using 1 monentry on/off/on switch per servo
     
  5. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    4,769
    969
    Why do you want to? You want each joint of the arm to be able to move independently of the others..
    However, if you are for example using 2 servos at 1 joint then yes you can.

    Did you even read the link I gave?.. Its only a few sentences and its clearly stated there :p

     
  6. kelvinmead

    Member

    May 15, 2011
    30
    0
  7. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
    2,802
    832
    Are you familiar with the way servo motors work? They are very different. For example, do you expect to be able to move smoothly between arm positions with momentary on-off-on switches? Note that in the link given in post #6, the control is via a potentiometer - giving a range of motion to the servo. If you have not used servos before, may I suggest this link http://www.lynxmotion.com/images/html/servo01.htm
     
  8. juniormachinist

    Thread Starter New Member

    Jul 3, 2012
    4
    0
    I am aware of how they work but I have seen many robot arm projects that use arudino and a lot of them have switches so I was thinking if you replace the pot with a switch because if you think about it pots are sort of a switch so in theory it should work
     
  9. ocelot28374

    Member

    Apr 16, 2012
    31
    0
    JM, you can also purchase a stand alone servo controller. I have used them in automation projects before. An example is the E_Sky ES000504, it can be purchased through eBay from HobbyCool for about five and a half bucks. I remove the control pot and remote locate it in some applications. Cheaper then buying the components for a home made controller and it works well.
     
  10. juniormachinist

    Thread Starter New Member

    Jul 3, 2012
    4
    0
    I have to build it myself
     
Loading...