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@@ -2,6 +2,10 @@
 
 ![](./docs/IMG_4936.jpg)
 
+Update Amplifier:
+
+![](./docs/IMG_4941.jpg)
+
 This Tetris implementation consists of a hardware and a software (running on that hardware).
 
 The hardware utilizes four MSP430 microcontrollers for 1.) the game play, 2.) the play ground canvas, 3.) the score display and 4.) the sound effects.
@@ -54,7 +58,7 @@ An amplifier following the proposal of the AY-3-8913 datasheet is implemented us
 The clock generator proposed by the AY-3-8913 does not work reliably, so an alternative design from "The Art of Electronics" has been used.
 
 ![](./docs/sound-driver-1.jpg) 
-![](./docs/sound-driver-2.jpg) 
+![](./docs/sound-driver-2.png) 
 ![](./docs/sound-driver-3.jpg) 
 ![](./docs/sound-driver-4.jpg)