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Monday, 30 April 2012

Theremin Stripboard Veroboard

quite a nice sounding little theremin - I even had PCBs made up for this one cause I loved it so much but for you here are the veros.
make sure that you do not ground the antenna by attaching the antenna to a metal project box like I accidently did cause it won't work, it is advisable to remove
all unused copper tracks to reduce any noise.
it only draws 65mA so you can use one of the smaller transistor sized voltage regulators with no heat issues.

edit: the trim pot is 10k and the external pot is 1k








28 comments:

  1. hi paul,
    values on the layout are correct?
    for example C8 in 10n or 10u?
    volume pot is linear?

    thank you so much!

    giulio

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  2. yes, both linear and yes I forgot about that mistake - it is the only one, when I made this up I meant to change it to 10u I must have forgotten!

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  3. Trimmer is 10k or 1k?? And why there are two C5 capacitors? Is it correct? I'm just trying your project right now...but still nothing to do...it doesn't work.
    Daniele

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  4. the offboard VR is 1K and the Trimmer is 10K
    there are 2 C5s because the Stripboard Program sometimes does that, they are both correct and are both 10u

    the pots have to be set so that it oscillates.
    double check all the cuts and placements because it definitely works, quite a few people have made this one - this is the exact one http://www.youtube.com/watch?v=eNcDH2fvtMo

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  5. thanks paul,

    so I'll check everything again and again and I let you know! :)

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  6. Hi Paul,
    May I ask if I wanna chain it w/guitar as effect pedal,where could I put the input signal into the circuit?
    Thank you~

    AGUN

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  7. its not really something you can plug a guitar into

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  8. Really??Because of terrible sounding or...?

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  9. no, it's cause it's basically an oscillator controlled by your hand interrupting radiowaves
    I suppose you could try and plug your guitar into where the antenna is and see what happens but I wouldn't be too hopeful

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  10. I just wanna make the effect like Trey Anastasio does...or maybe it must be played as stereo signal...?
    http://www.youtube.com/watch?v=vP_VcJN6ro8
    (1:10)

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  11. Hi Paul, are you just using a copper plate for the antenna here??

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    Replies
    1. it's not even that, it's just a piece of copper clad board I had (the stuff they use to etch circuits into)

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  12. Hi Paul,

    How (what value) did you adjust the on-board trimpot?

    thx

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    Replies
    1. I just turned it till it did what I wanted it to do

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    2. made it, but must've done something wrong here... only get some continuos humming... gonna check it later... i used a telescope antenne (like transistor-radio's)... that should do the trick, right? or better use some copper like you did?

      grtz

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    3. Don't bother 'bout last question... there's something theremin-y there (run through guitar-amp) but it's extremely quiet...

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  13. just build it!
    fantastic organ!
    i've used a much bigger sheet of copper and you can play with both hands!

    i've also managed to replace some components in your layout so i made a 16x20 board.
    i didn't have any 270k and i put some 300k but it sound exactly as your video.

    it's really great man!!!! thanks a lot.

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  14. Thanks for the work! a few doubts... is the negative 9volts connection to the ground?
    are both negative 9volts and ground connected to the female jack output? thanks and sorry if this answers sounds silly, I am a novice :)

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    Replies
    1. yes to both those questions.
      it's okay to be new at something and to ask questions

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    2. Thanks!!!!! I'll send you a photo when I've made it.

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    3. no worries - I'll look forward to seeing it

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  15. Hey Paul, Frag Magnet from the BYOC forum here with a couple of questions:

    I'm working on an Eagle layout (Mrs. Magnet wants one of these and I've fallen into the Eagle-OSH Park Vortex) and I was wondering if you have a schematic that I could double check mine against (or if you'd be willing to look at what I've got)?

    Finally, once I get everything working would you be okay with me sharing my schematic and/or Eagle .brd file (with proper credit and a link to your site) or would you prefer I keep those items to myself?

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  16. anybody can't help mee? can't I use tc4069ubp ? cant send picture how much trim pot set? BTW great layout and I like your demo therenim

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    Replies
    1. you set the trimpot till it makes the right sound and yes you can use that IC

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  17. thanks .. I started to try this

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  18. AMAZING !!!!!!! OK thank Mr.Paul .. my theremin work fine.sound cool
    https://youtu.be/Y6MnctoH1aIn

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