Initial Commit

README.md

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+Denon PMA-770 (and others) Arduino Control
+
+# About
+
+This project ultimately seeks to be a "logic control" modification for a 
+Denon PMA-770; allowing one to do things like change inputs, volume, 
+balance, and tone using a remote control.
+
+But that's a long ways down the road; so right now it's goal is to drive 
+relays and a display to replace the source input switches and input 
+display. I am designing it around the aforementioned Denon; but it can 
+obviously work for other units with some modification. 
+
+Schematics and pictures up later.
+
+# History
+
+```
+28-Dec-2019: Initial Version. Just reads five switches and triggers an 
+output.
+29-Dec-2019: Added a display. Cleaned up code. Made a repository.
+````
+

pma770.ino

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+/*
+  Input Relay Alpha
+
+  dewdude@gmail.com - 28-12-2019
+  
+ */
+
+int latchPin = 11;
+int clockPin = 9;
+int dataPin = 12;
+int matrix = A0;
+
+byte out = 0;
+int mx = 0;
+void updateShiftRegister()
+{
+   digitalWrite(latchPin,LOW);
+   shiftOut(dataPin, clockPin, LSBFIRST, out);
+   digitalWrite(latchPin, HIGH);
+}
+void setTape2()
+{
+  bitSet(out,5);
+  updateShiftRegister();
+}
+void setTape1()
+{
+  bitSet(out,4);
+  updateShiftRegister();
+}
+void setAUX()
+{
+  bitSet(out,3);
+  updateShiftRegister();
+}
+void setTune()
+{
+  bitSet(out,2);
+  updateShiftRegister();
+}
+void setPh1()
+{
+  bitSet(out,1);
+  updateShiftRegister();
+}
+
+void setup()
+{
+  pinMode(latchPin, OUTPUT);
+  pinMode(dataPin, OUTPUT);  
+  pinMode(clockPin, OUTPUT);
+  Serial.begin(9600);
+  Serial.print("Setting default output");
+  bitSet(out,7);
+ updateShiftRegister();
+ Serial.print("Scanning Matrix");
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+int mx = analogRead(matrix);
+  if (mx > '100' && mx < '200')
+    {setTape2();}
+  if (mx > '500' && mx < '600')
+    {setTape1();}
+  if (mx > '900' && mx < '950')
+    {setAUX();}
+  if (mx > '1000')
+    {setTune();}
+  if (mx > '820' && mx < '899')
+    {setPh1();}
+Serial.println(mx);
+delay(200);
+}