Hello everyone!
Thanks to this circuit you can put an access key to enter in a home,door Lab,etc. If somebody tries to access to this enclosure and introduces three times the password incorrectly, this activated a sonorous alarm. The key is introduced by means of a keyboard of 16 keys and the state in a LCD 16X2.When introducing the correct key, the circuit activates a relay which drives the device to opening the door.The "brain" of this device is a PIC16F877
I´m trying to put this project to work, i´ve already have the PCB and all the hardware conected, but when i "feed" the circuit the only thing that shows in the LCD is 32 black squares
The Lcd i´ve used is this:
**broken link removed**
and it is supposed to work in 8bit mode
I´ve attached the source code (used the microchip Mplab 7.2 compiler and shwoned no erros in the code) and a picture of the project,the picture reffers to a Pic16F876 but I´ve used a Pic16F877 and use the same port configuration and components
Can anyone help me?
Thanks in advance
Thanks to this circuit you can put an access key to enter in a home,door Lab,etc. If somebody tries to access to this enclosure and introduces three times the password incorrectly, this activated a sonorous alarm. The key is introduced by means of a keyboard of 16 keys and the state in a LCD 16X2.When introducing the correct key, the circuit activates a relay which drives the device to opening the door.The "brain" of this device is a PIC16F877
I´m trying to put this project to work, i´ve already have the PCB and all the hardware conected, but when i "feed" the circuit the only thing that shows in the LCD is 32 black squares
The Lcd i´ve used is this:
**broken link removed**
and it is supposed to work in 8bit mode
I´ve attached the source code (used the microchip Mplab 7.2 compiler and shwoned no erros in the code) and a picture of the project,the picture reffers to a Pic16F876 but I´ve used a Pic16F877 and use the same port configuration and components
Can anyone help me?
Thanks in advance
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