Home Forums The Lounge phase shift oscillator?

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  • #80635

    has anybody made one?

    #111003
    julian
    Moderator

    What do you mean exactly?

    #111089

    have you made a phase shift oscillator?

    #111098
    companyman
    Participant

    clearly…the phase shift oscillator guantlet has been thrown down.

    #111114
    julian
    Moderator

    Maybe I should be clearer:

    By phase shift oscillator, are you saying phaser?

    I’ve never built a phaser, but I don’t think it would be that difficult. They’re rather simple. Usually just an oscillator with a bunch of allpass filter stages and a feedback circuit.

    #111133

    no, i mean an oscillator. phaser schematics look kinda difficult to me.
    Rc_phase_shift_oscillator.gif

    #111135
    Mr.Grim
    Member

    do you have the part list for this schematic? im sure i got them all layin around, ill whip one together real quick and let you know!!

    #111143

    thats the thing. (almost) all of the schematics for it i find have no valves for the components but they do have a mathematical formula which can determine values, i do beleive.
    i just found this website with a buncha different things you can try for it. i dont understand all of it and of course i dont want to read.
    http://www.aikenamps.com/PhaseShiftOscillators.html
    the other day, i found this one but i was on another computer and you need java to see it so it may be the wrong one
    http://www.falstad.com/circuit/e-phaseshiftosc.html

    #111147
    julian
    Moderator

    You can make an oscillator with a 555 timer IC.

    There a are a couple simple oscillators here:

    http://www.beavisaudio.com/projects/ArmageddonProcessor/

    #111148

    i looked at the site. some really cool stuff on there! whats a 555 timer ic? ic is integrated circuit right?

    #111367
    Explorer
    Member
    Quote:
    i looked at the site. some really cool stuff on there! whats a 555 timer ic? ic is integrated circuit right?

    Okay, now I have to ask *you* a few questions:

    Where are you curious about whether someone else has built one? Do you have questions about its use?

    Do you have an application for it, and therefore are thinking of building it?

    Do you have any idea what it’s normally used for, or is this similar to someone who reads about a device, and decides it would be good to have one, even if that person isn’t clear what it does?

    Given the following comment…

    Quote:
    i just found this website with a buncha different things you can try for it. i dont understand all of it and of course i dont want to read.

    …it seems that you’re not familar with basic effects or ciruitry. That’s okay, since everyone has to start somewhere. However, one does have to *start* somewhere.

    Given what you’ve linked to, you might consider building a tremolo unit. There are kits for such pedals, so you’ll gain a bit of understanding, and can then decide if you want to go further.

    Of course, if it’s just idle curiosity, and you don’t want to do the research yourself… then at least spell out what you want, so others can decide if they want to invest their own time to make up for time you don’t want to waste on your own question.

    #111371
    julian
    Moderator

    IC means integrated circuit, yes.

    #111413

    @explorer – i asked about a phase shift oscillator because i want to build one just for fun and also so i dont have to play guitar if im gonna test out a home made pedal. i ask here because on the schematics ive found for a phase shift oscillator, i havent seen values for for resistors or capacitors. i have made a pedal before but i am still learning day by day. if you can help, it would be extremely appreciated.

    #111424
    julian
    Moderator

    If you just want something to test out pedals with without playing guitar, build the drone oscillator circuit on the site I linked you to.

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