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+++ b/README.md
@@ -20,6 +20,8 @@ Most mains energy meters have an LED which flashes 500 or 1000 pulses for every
 - Stores data in EEPROM to prevent data loss
 - Easy to configure via telnet port 1000
 
+![Prototype](./hardware/prototype-small.jpg "prototype")
+
 ## Requirements
 
 - Arduino IDE (version 2.0.2)
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