[sdiy] Opamp ICs (slightly OT)

[Paul Schreiber]

Immediately purchase the book "Electronic Projects for Musicians" by Craig Anderton (amazon has it). This will answer your questions, and save you hours of grief.

Paul S.

  ----- Original Message ----- 
  From: Robotboy8 at aol.com 
  To: synth-diy at dropmix.xs4all.nl 
  Sent: Wednesday, September 24, 2003 9:39 PM
  Subject: [sdiy] Opamp ICs (slightly OT)


  I'm tentatively working on a fretless 2-string drone bass guitar (not a synth... but i might add a lowpass filter whose cutoff is controlled by a ribbon controller under the fretboard).  I'm planning on not using a standard pickup but instead on using the strings as pickup with a strong magnet (from a car speaker) beneath them.  I do not know, however, whether the signal attained this way will be strong enough without using a magnet so strong that the strings tend to stop vibrating rather quickly (undesirable, as I intend this for drone use).  I'm thinking that I'll put an opamp IC right before the output (ratshack seems to have some for relatively cheap, if i recall correctly).  I've not used many ICs before, though, so can anyone recommend one for this use and explain where to connect which pins (okay, my rather incredible newbiness shows itself...)  Am I correct in assuming that I need basically just the + and - connections from the string and the + and - connections from the powersource (in this case batteries)?  Or are there many other connections to make (possibly a ground... any others?)

  Also, does this make any sense?  Will the output voltage just be too low for suitable audio use?  Or will I not need an opamp anyway?

  Thanks in advance 
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