diff --git a/Electrical/Board_003/mbus_master.png b/Electrical/Board_003/MBus_Simulator.png
similarity index 100%
rename from Electrical/Board_003/mbus_master.png
rename to Electrical/Board_003/MBus_Simulator.png
diff --git a/Electrical/Board_003/README.md b/Electrical/Board_003/README.md
index f970383f..ecde82bf 100644
--- a/Electrical/Board_003/README.md
+++ b/Electrical/Board_003/README.md
@@ -9,7 +9,7 @@ to a M-bus level signal. It only supports sending. Based on
 It depends on an external power source capable of delivering 25-40 Volt.
 Most DC-DC boost/step-up converter modules<sup>2</sup> should be fine for this.
 
-![](mbus_master.png)
+![](MBus_Simulator.png?raw=true)
 
 ## BOM