beginning of desk LED strip dimmer

[Arduino] / Desk_LED_dimmer / Desk_LED_dimmer.ino

diff --git a/Desk_LED_dimmer/Desk_LED_dimmer.ino b/Desk_LED_dimmer/Desk_LED_dimmer.ino
new file mode 100644 (file)
index 0000000..8289fdc
--- /dev/null
+++ b/Desk_LED_dimmer/Desk_LED_dimmer.ino
@@ -0,0 +1,84 @@
+/*
+    Over complicated desk LED dimmer
+    2016-01-10 Dobrica Pavlinusic <dpavlin@rot13.org>
+*/
+
+const int led_pin = 13;
+const int buzzer_pin = 4;
+const int mosfet_pins[] = { 9, 10, 6 };
+int mosfet_pwm[] = { 0, 0, 0 };
+
+void setup() {
+  Serial.begin(115200);
+
+  pinMode(led_pin, OUTPUT);
+  pinMode(buzzer_pin, OUTPUT);
+
+  for(int i=0; i<sizeof(mosfet_pins); i++) pinMode(mosfet_pins[i], OUTPUT);
+
+  Serial.println("Commands: b - beep, qwe/asd/zxc - MOSFETs");
+
+}
+
+void mosfet(int nr, int value) {
+  int pwm = mosfet_pwm[nr];
+  if ( pwm == value ) {
+    Serial.println("ignored");
+    return;
+  }
+  Serial.print("MOSFET ");
+  Serial.print(nr);
+  Serial.print(" = ");
+  Serial.println(value);
+  int sleep = 1000 / abs(pwm - value);
+  int step = pwm < value ? 1 : -1;
+  for(int i=pwm; i != value; i += step) {
+    analogWrite(mosfet_pins[nr], i);
+    Serial.println(i);
+    delay(sleep);
+  }
+  analogWrite(mosfet_pins[nr], value);
+  mosfet_pwm[nr] = value;
+}
+
+void loop() {
+  if (Serial.available()) {
+    digitalWrite(led_pin, HIGH);
+    int in = Serial.read();
+    switch (in) {
+      case 'b':
+        tone(buzzer_pin, 1800, 100);
+        delay(200);
+        tone(buzzer_pin, 2200, 100);
+        delay(500);
+        break;
+      case 'q': mosfet(0, 255); break;
+      case 'a': mosfet(0, 127); break;
+      case 'z': mosfet(0, 0); break;
+      case 'w': mosfet(1, 255); break;
+      case 's': mosfet(1, 127); break;
+      case 'x': mosfet(1, 0); break;
+      case 'e': mosfet(2, 255); break;
+      case 'd': mosfet(2, 127); break;
+      case 'c': mosfet(2, 0); break;
+
+      /*
+              m1 = (m1 + 10) % 255;
+              analogWrite(mosfet1_pin, m1);
+              Serial.print("MOSFET 1 = ");
+              Serial.println(m1);
+              break;
+            case 'a':
+              m1 = (m1 - 10) % 255;
+              analogWrite(mosfet1_pin, m1);
+              Serial.print("MOSFET 1 = ");
+              Serial.println(m1);
+              break;
+      */
+      default:
+        Serial.print("unknown command ");
+        Serial.println(in);
+    }
+    digitalWrite(led_pin, LOW);
+  }
+}