Version 1

QC2_adapter_board_ATTiny_Code/QC2_adapter_board_ATTiny_Code.ino

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+/*
+   ATTiny 13 Quick Charge 2.0 Powerbank Adapter Board
+   Author: dustinbrun
+           licensed under CC BY 4.0
+
+   Version 03.2022
+*/
+
+const int J1 = 4;
+const int Dp_2k2 = 0;
+const int Dp_10k = 1;
+const int Dn_10k = 2;
+const int load = 3;
+
+bool active_9V = 0;
+
+void setup()
+{
+  delay(500);
+
+  pinMode(load, OUTPUT);
+  pinMode(J1, INPUT_PULLUP);
+
+  blink_load(2, 100);
+
+  // Quickcharge Init
+  pinMode(Dn_10k, INPUT);
+  pinMode(Dp_2k2, INPUT);
+  pinMode(Dp_10k, OUTPUT);
+  digitalWrite(Dp_10k, HIGH);
+  delay(2000);
+  pinMode(Dn_10k, OUTPUT);
+  digitalWrite(Dn_10k, LOW);
+  delay(500);
+  // End of Quickcharge Init
+
+  digitalWrite(load, HIGH);
+  delay(500);
+  
+  if (digitalRead(J1) == LOW) //Jumper is set, Output 9V
+  {
+    // Quickcharge set 9V
+    pinMode(Dp_2k2, OUTPUT);
+    digitalWrite(Dp_2k2, HIGH);
+    digitalWrite(Dn_10k, HIGH);
+    // End of Quickcharge set 9V
+    
+    blink_load(2, 500);
+    active_9V = true;
+  }
+  else  //Jumper is not set, Output 12V
+  {
+    // Quickcharge set 12V
+    pinMode(Dp_2k2, OUTPUT);
+    digitalWrite(Dp_2k2, LOW);
+    digitalWrite(Dn_10k, HIGH);
+    // End of Quickcharge set 12V
+    
+    blink_load(1, 500);
+    active_9V = false;
+  }
+}
+
+void loop() 
+{
+  delay(3000);
+
+  if (active_9V)
+  {
+    blink_load(2, 1000);
+  }
+  else
+  {
+    blink_load(1, 1000);
+  }
+
+}
+
+
+void blink_load(int x, int delaytime)
+{
+  for (int i = 0; i < x ; i++)
+  {
+    digitalWrite(load, HIGH);
+    delay(delaytime);
+    digitalWrite(load, LOW);
+    delay(delaytime);
+  }
+}