Update README.md

Author: jdsalmonson

Robot1/README.md

@@ -25,6 +25,7 @@ Arduino Sketches
 ================
 
 Sketches for the testing an use of our robot:
+ * [Photoresistor_n_Joystick_to_HbridgeL293D](https://github.com/jdsalmonson/LPCMakerClass/tree/master/Robot1/Photoresistor_n_Joystick_to_HbridgeL293D) - Sketch that runs robot in joystick mode or phototropic mode.  Based on the sketch below.
  * [Photoresistor2_to_HbridgeL293D](https://github.com/jdsalmonson/LPCMakerClass/tree/master/Robot1/Photoresistor2_to_HbridgeL293D) - Full sketch to run motors based on photoresistor levels, causing the robot to phototropically steer toward a flashlight. 
  * [SimplePhotoresistorTest](https://github.com/jdsalmonson/LPCMakerClass/tree/master/Robot1/SimplePhotoresistorTest) - Simple test of the photoresistor circuit: writes the photoresistor voltage reading from analog pin A0 to the serial monitor.
 
@@ -36,5 +37,7 @@ Also we have the Fritzing files for wiring this robot.  These include:
  * Robot1_H-Bridge_Wiring.png  - PNG graphic of above Fritzing diagram
  * Robot1_H-Bridge_PhotoResistorWiring.fzz  - the H-bridge wiring contained in the file above plus the photoresistor circuits
  * Robot1_H-Bridge_PhotoResistorWiring.png  - PNG graphic of above Fritzing diagram
+ * Robot1_H-Bridge_PhotoResistorWiring_9Volt.fzz  - the Fritzing file incorporating a 9 Volt battery instead of 6 Volts.
+ * Robot1_H-Bridge_PhotoResistorWiring_9Volt.png  - PNG graphic of above Fritzing diagram
 
-![PhotoResistorWiring figure](Robot1_H-Bridge_PhotoResistorWiring.png)
+![PhotoResistorWiring figure](Robot1_H-Bridge_PhotoResistorWiring_9Volt.png)