update battery circuit

README.md

@@ -79,13 +79,13 @@ RadiationD-v1.1(CAJOE):
 
 12V power mod with step down converter and voltage divider for voltage measurement:
 
-    BAT+ --+--------------.
-           \R\            |
-            \1\           '
-              >---+--------------------------------- A0
-            /R/   |       .    ________________
-           /2/   === C1   +---| buck converter |---- 5V
-    BAT- --'------+-----------|________________|---- GND
+    BAT+ --[FUSE]--+--------------.
+                   \R\            |
+                    \1\           '
+                      >---+--------------------------------- A0
+                    /R/   |       .    ________________
+                   /2/   === C1   +---| buck converter |---- 5V
+    BAT- ----------'------+-----------|________________|---- GND
 
   Example values: R1=1MΩ, R2=100kΩ, C1=some ceramic capacitor (optional)
   measures up to ~30V