Update README.md

Author: DefinetlyNotAI

README.md

@@ -27,7 +27,7 @@ Here’s how to set up the circuitry:
   - One leg of the LDR: Connect to **A1** on the Arduino Nano.
   - The other leg of the LDR: Connect to **5V** on the Arduino Nano through a **10kΩ pull-down resistor** to **GND**. This configuration ensures the LDR provides a readable voltage level at **A1**.
 
-![Circuit Diagram](https://cdn.hack.pet/slackcdn/66a98bc1bb42abdd407a4204a5e91a3e.png)
+![Circuit diagram](https://github.com/user-attachments/assets/49237c92-5590-4c77-841c-89898fff56c5)
 
 ### Receiver Side