555 timer project

Discussion in 'The Projects Forum' started by meet, Aug 14, 2011.

  1. meet

    Thread Starter New Member

    Aug 14, 2011
    2
    0
    can any one please suggest a project of 555timer ic which can be made by a group of 6 students at a sem 5 level
     
  2. JingleJoe

    Member

    Jul 23, 2011
    185
    10
    I don't know what a sem level is but the standard 555 astable circuit is good fun and anyone over 9 years old should be able to make it, most people over that age have the potential to understand it too.

    http://www.kpsec.freeuk.com/555timer.htm#astable

    Regarding the circuit diagram there, you don't need the cap on pin 5, I allways leave it off my 555 timers and they're fine, however if you have problems, it may be because that cap is missing.

    That website is full of useful stuff :)
     
    meet likes this.
  3. meet

    Thread Starter New Member

    Aug 14, 2011
    2
    0
    thank you for the suggestion
     
  4. KJ6EAD

    Senior Member

    Apr 30, 2011
    1,425
    363
    Why don't you see if you can make a basic remote control for a TV or stereo system out of 555 timers. Just on/off and a few functions would be sufficient. That should be at least a little challenging.
     
  5. JingleJoe

    Member

    Jul 23, 2011
    185
    10
    Tell me more? :)
     
    meet likes this.
  6. KJ6EAD

    Senior Member

    Apr 30, 2011
    1,425
    363
    Most appliance remote controls operate on or about 38.5kHz and use relatively simple modulation schemes such as pulse width (PWM) pulse position (PPM) or on-off keying (OOK). The carrier frequency is well within the capability of the 555 and it might be possible to hard wire the needed modulating codes into separate 555's to modulate the carrier for each control function. It may be feasible to build such a thing.
     
  7. JingleJoe

    Member

    Jul 23, 2011
    185
    10
    That's a brilliant idea! :)
    Truly the possibilities of the 555 timer are endless, you have given me some inspiration too.
     
Loading...