README.md

@@ -37,7 +37,7 @@ around (and lost, or forgotten on a public transportation...) with reduced risk.
 The design is based on the rp2040 "Raspberry Pi Pico" board, with a few components
 and peripherals connected as shown here:
 
-![motenpoche schematic](doc/png/motenpoche_sch.jpg)
+![motenpoche schematic](doc/png/motenpoche_sch.png)
 
 
 ### Pinout