Guitar signal as Control Voltage

Discussion in 'General Electronics Chat' started by Distortedskies, Jan 26, 2006.

  1. Distortedskies

    Thread Starter New Member

    Jan 26, 2006
    Hey guys, I know some electronics but I am having trouble understanding how CV's work. I want to use a guitar signal to vary the pitch of an oscillator, Is this possible. The setup I am experimenting with is a 555 timer oscillator. any help or insights would be appreciated, thanks.
  2. pebe

    AAC Fanatic!

    Oct 11, 2004
    Pin 5 of a 555 is the Voltage Control pin and normally sits at 2/3 of the supply voltage. You can vary the frequency of a 555 running in astable mode by varying the voltage on that pin.

    Ideally you need to rectify the guitar signal to get a DC votage of, maybe, 10% of supply volts, and use it to vary pin 5.