FUNCTION GENERATOR - giantmolecules/SANDIN-IMAGE-PROCESSOR GitHub Wiki

AC-01

The function generator generates an output which is an arbitrary function (with up to two points of inflection) of the input at JI1. This results in an effect that is similar to but more complex and controllable than photographic solarization.

  • The function is controlled by R1, R2, and R3.
  • R1 controls the slope of the function for large negative inputs.
  • R2 controls the slope of the function for input near 0 voltages.
  • R3 controls the slope of the function for inputs of large positive voltage.

Clockwise is positive slope; counterclockwise is negative slope.

There are three electrical modules in one chassis box, so replicate work three times. Remember to buss (connect +12 and -12 and ground wires from middle board to top and bottom board. Soldering directly to the foil is convenient.

TEST STUFF:

The 20k trimming resister on the VS5 board is adjusted such that no input results in 0 output voltage + or - 0.05V.