1 files changed, 19 insertions, 0 deletions

diff --git a/tv_light/src/tv_light.ino b/tv_light/src/tv_light.ino
index 492069d..caf3a6e 100644
--- a/tv_light/src/tv_light.ino
+++ b/tv_light/src/tv_light.ino
@@ -288,6 +288,8 @@ void flipRelay(struct sensor_t *sensor, bool send_update)
 
 inline uint8_t pwmValue(uint8_t level)
 {
+  // see https://www.mikrocontroller.net/articles/LED-Fading
+#if 0
   static const uint8_t pwmtable[101] PROGMEM = {
     0,   1,   1,   1,   1,   1,   1,   2,   2,   2,
     2,   2,   2,   2,   2,   2,   3,   3,   3,   3,
@@ -302,6 +304,23 @@ inline uint8_t pwmValue(uint8_t level)
     255
   };
   return (uint8_t)pgm_read_byte(&pwmtable[level]);
+#else
+  // max pwm: 255-19, 101 steps, every step +20
+  static const uint8_t pwmtable[101] PROGMEM = {
+      0,  20,  20,  20,  20,  20,  20,  21,  21,  21,
+     21,  21,  21,  21,  21,  21,  22,  22,  22,  22,
+     22,  22,  22,  23,  23,  23,  23,  24,  24,  24,
+     24,  25,  25,  25,  26,  26,  26,  27,  27,  28,
+     28,  29,  29,  30,  30,  31,  32,  32,  33,  34,
+     35,  36,  37,  38,  39,  40,  41,  42,  43,  45,
+     46,  48,  49,  51,  53,  55,  57,  59,  61,  63,
+     66,  68,  71,  74,  77,  80,  83,  87,  91,  95,
+     99, 103, 108, 113, 118, 124, 130, 136, 142, 149,
+    156, 164, 172, 181, 190, 199, 209, 220, 231, 243,
+    255
+  };
+  return 255 - (uint8_t)pgm_read_byte(&pwmtable[level]);
+#endif
 }
 
 void fadeDimmer(struct sensor_t *sensor, uint8_t level, bool send_update)