Update README.md

README.md

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 # flipperzero-rfidbeacon
 A letter/number [morse]([https://en.wikipedia.org/wiki/Letter_beacon](https://fr.wikipedia.org/wiki/Code_Morse_international)) beacon on **125 kHz** using **RFID** interface of the **Flipper Zero**
 
-![banner](https://github.com/nmrr/flipperzero-rfidbeacon/blob/main/img/banner-rfid.jpg)
+![banner](https://raw.githubusercontent.com/nmrr/flipperzero-rfidbeacon/main/img/banner-rfid.jpg)
 (banner has been made with **DALL-.E 2**)
 
+
 Like Russia with their HF [letter beacons](https://en.wikipedia.org/wiki/Letter_beacon), it's possible to use the **Flipper Zero** as a letter/number morse bacon. **Flipper Zero** has multiple RF interfaces (RFID, NFC and UHF) and it's possible to transmit raw data over these interfaces.
 
 This application can transmit the whole alphabet (A to Z) and numbers (0 to 9) in morse on **RFID** interface. Range is about 5m.