Linearizing an LED for 800 pwm steps'?

[Mike, K8LH]

Hi Hank,

Sorry for the late reply. Glad you figured it out. Another slightly more recent version of that Gamma Table program is listed below.

Gamma values of 1.7 to 1.9 worked good for me but it's very much dependent on your LEDs, voltage, hardware, etc..

Cheerful regards, Mike

 '  Leo Bodnar's 'antilogarithmic'
 '  gamma correction algorithm (Mike, K8LH)
 '
 '  JustBASIC (free) interpreter
 '
 Input "Gamma array size: "; arraysize
 Input " Total PWM steps: "; width
 Input "Gamma correction: "; gamma       ' try 0.5 to 1.0
 Input "Entries per line: "; entries     '

 FOR index = 0 to arraysize-1
    dcyval = INT(width^(((index+1)/arraysize)^gamma)+.3)
    if(index MOD entries = 0) then
      PRINT
      PRINT "  DW ";
    else
      PRINT ",";
    end if

    if(dcyval < 100) then print " ";
    if(dcyval < 10) then print " ";
    PRINT dcyval;
 NEXT index
 PRINT
 PRINT
 REM CLOSE