diff --git a/README.md b/README.md
index 1885742..421097b 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,8 @@ I didnt end up using the dc/dc converter because the esp8266 runs on 3.3v
 
 ![The inside](http://dkc-hvac.com/images/projects/solar-weather-station-guts.jpg)
 
+The orange and white are power going to the Vin and Gnd pins on the esp8266.  Orange is ground coming from the lm4056 and white is power coming from the switch.  With the switch positioned like this i can isolate the esp8266 from the solar/battery and use the usb socket if further programming is needed.
+
 ![the outside](http://dkc-hvac.com/images/projects/solar-weather-station.jpg)
 
 download the .ino file and alter to your specification
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