Add 7-pin DIN standard

README.md

@@ -17,7 +17,14 @@ into USB ports.
 
 
 # Pins
-Pins on the MP-101 cable.
+Not all cables have the same color pin out. In fact, most have different
+pinouts, so each cable should be tested.
+
+## Pins from Bescor 50 Foot Extension Cable
+Pins on the MP-101 50 foot extension cable.
+
+Note, the pin ordering standard is different than I used below.
+The standard doesn't go in order.
 Starting at "7PM", just after the key, going clockwise:
 
 ```
@@ -34,9 +41,22 @@ GND	Red	7	GND under ICSP		 7 GND
 
 The "ArduinoPin" column is how the Arduino pins on the Panda are labelled.
 
+
+## 
+The standard DIN pin ordering for a 7-pin connector is below:
+
+![7 Pin DIN Connector Pinout](img/DIN_connector_pinout-7pin.png)
+From: https://en.wikipedia.org/wiki/DIN_connector
+
+
+## Pins from Bescor 50 Foot Extension Cable
+
+
+## Pi 4
 On the Raspberry Pi 4, with Raspbian installed running `pinout` will
 majickally print the pinouts.
 
+
 # Wire Harness
 I made a quick and dirty wire harness that works.
 My MP101 kit came with two extension cables.