[sdiy] question: a simple blend circuit?

[harrybissell]

I t may or may not work that easy... Piezos are usually quite high
impedance and don't
take well to much loading. In particular, they are inherently capacitors
(small, maybe .01uF
or so) so using a resistor forms a built in hipass filter.

The piezo should probably be buffered first, simple transistor or fet
should do, then the
pot blend trick WILL work.

You can arrange the battery so that the circuit is powered when the
guitar (mono) cable is
inserted just like in the pedals...

H^) harry

Daniel Englbert wrote:

> Simple solution ... get a pot, on one out-side terminal put input A,
> on the
> other outside terminal put input B, in the middle terminal is the
> output...
>
> ~kirch
>
>
> wow, really? i thought it may be that simple, is it true? !
>
> what type of pot 250k?
>
>
> ---------------------
> original question
>
> hi, i'm a relative fool when it comes to diy stuff, building guitar
> pedals
> from diagrams and kits is all my experience..
>
> i enjoy reading this list nontheless, i find the subject really
> interesting
>
> anyway, i have a question i was hoping to get some help on if anyone
> has the
> free time
>
> i want to make a simple blend circuit for my bass guitar
> i've been experimenting with piezo transducers along with the
> standard
> magnetic pickups
>
> what i want to do is have a potentiometer control the blend between
> the two
> sources
> so for example when the knob is turned fully to the left the magnetic
> pickups are passed to the output jack, if the knob is fully to the
> right
> only the piezo pickups are heard. anywhere inbetween would just be a
> mix of
> the two
> i'd probably drill out an extra hole for this knob..
>
> i was thinking of housing this in the control cavity where the
> standard
> volume pots are so the component count would have to be low...
>
> is this hard to do? do i need opamps and a little perfboard? i have no
> idea
> how to do this, if anyone could help or point me to some schematic
> (or
> better yet component wiring diagram) i'd be SUPER happy!!!
>
> i could barter some litttle bits of gear for the help! guitar pedals
> or
> something like that
>
> thanks for your time
> -dan englert
>
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> Subject: RE: [sdiy] question: a simple blend circuit?
> Date: Tue, 27 Jan 2004 17:15:41 -0500
> From: "Joel Kirchartz" <joel_kirchartz at hotmail.com>
> To: denglerthm at hotmail.com, synth-diy at dropmix.xs4all.nl
> Simple solution ... get a pot, on one out-side terminal put input A,
> on the other outside terminal put input B, in the middle terminal is
> the output...
>
> ~kirch
>
> >From: "Daniel Englbert"
> >To: synth-diy at dropmix.xs4all.nl
> >Subject: [sdiy] question: a simple blend circuit?
> >Date: Tue, 27 Jan 2004 16:51:38 -0500
> >MIME-Version: 1.0
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> >
> >
> >hi, i'm a relative fool when it comes to diy stuff, building guitar
> >pedals from diagrams and kits is all my experience..
> >
> >i enjoy reading this list nontheless, i find the subject really
> >interesting
> >
> >anyway, i have a question i was hoping to get some help on if anyone
> >has the free time
> >
> >i want to make a simple blend circuit for my bass guitar
> >i've been experimenting with piezo transducers along with the
> >standard magnetic pickups
> >
> >what i want to do is have a potentiometer control the blend between
> >the two sources
> >so for example when the knob is turned fully to the left the
> >magnetic pickups are passed to the output jack, if the knob is fully
> >to the right only the piezo pickups are heard. anywhere inbetween
> >would just be a mix of the two
> >i'd probably drill out an extra hole for this knob..
> >
> >i was thinking of housing this in the control cavity where the
> >standard volume pots are so the component count would have to be
> >low...
> >
> >is this hard to do? do i need opamps and a little perfboard? i have
> >no idea how to do this, if anyone could help or point me to some
> >schematic (or better yet component wiring diagram) i'd be SUPER
> >happy!!!
> >
> >i could barter some litttle bits of gear for the help! guitar pedals
> >or something like that
> >
> >thanks for your time
> >-dan englert
> >
> >_________________________________________________________________
> >Check out the coupons and bargains on MSN Offers!
> >http://shopping.msn.com/softcontent/softcontent.aspx?scmId=1418
> >
>
>
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