I have programmed my circuit so that when the keys 1,2,3 and 4 are pressed in a row, the LCD displays "Money Box Unlocked!" and the solenoid closes. Also, after I press the correct key, it is displayed on the LCD. For example, When I press 1, 1 is displayed on the LCD and when I press 2, 1 and 2 are displayed on the LCD until the whole code is entered. I want to program it so that when a wrong key is pressed at any stage of entering the code, a sound is played from the Piezo Transducer and the LCD displays a message along the lines of "Wrong Code Entered!". Additionally, I want to make my solenoid start in a locked position so that when the code is entered, the solenoid opens.
Below i have attached my circuit and my flowchart. My circuit currently doesn't have resistors and I will appreciate any help! Thanks!
Below i have attached my circuit and my flowchart. My circuit currently doesn't have resistors and I will appreciate any help! Thanks!
