Re: Can I do this with a uProcessor?

On Sun, 27 May 2007 10:31:44 -0400, tempus fugit wrote:

Yes you can use jfets in series with the signal (like a relay as you put
it) as
well as to switch to ground so there's no problem there.

Just remind me what voltages you have available.

Graham

ATM I have +5, +9 and +12v available.

How would you wire the JFETs so that they could work as bypasses for the
effects without grounding the entire chain?


I think I have an idea what you're saying - you'd use the FETS to short
across a given stage in this string of effects circuits.

I'd use something like CD4053s, like a SPDT switch at the input
and output of each effect stage, one on the input and the other
on the output, with NC of each going to the circuit and both NO's
going to each other.

NO NO
C o-----------------------o C
------o o--> to next stage
o----[effect circuit]---o
NC NC

(The switch "wipers" (actually analog switches) are invisible in this
view.)

Wiring 4053s as SPDT switches, is, of course, left as an exercise for
the reader. ;-)

Good Luck!
Rich

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