diff --git a/Electrical/README.md b/Electrical/README.md
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@@ -0,0 +1,16 @@
+
+# Overview
+
+Here are links to the different board designs together with a short summary.
+
+## Board 1
+
+This project currently contains only one [board design](Board_001). It
+
+* is based on the ESP8266 chip.
+* is powered by USB.
+* uses a very simple voltage divider to demodulate the M-bus signal.
+
+### Status
+
+Prototypes have been made and some people have started using them(?).
diff --git a/README.md b/README.md
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@@ -27,7 +27,7 @@ The project should include:
 
 ## Electrical design
 
-* [Electrical design](./Electrical/Board_001)
+* [Electrical design](./Electrical)
 
 
 ### Circuit prototype