PIC Designed Score Keeping Computer

The project was based on a PIC16F84A to build a simple score keeping computer.

During the initial construction, the first attempt was to tune ON/OFF an LED by pressing a button while the power supply resides on the same breadboard. Two LEDs were used wherein two outputs are handled and toggled between the two. A program was created to display the number from 0-9 each time the button was pressed. The LCD display was connected using six wires from the 13 ports of the PIC16F84A. These wires can be reduced by making the 74LS174 into a regular shift register.

The current version has an attached speaker where the 3-wire interface and the LCD display is handled by the 74HC174. An additional board is required to create a serial interface between the PC and the PIC16F84A. To prevent difficult access to the push buttons and avoid the game being slightly playable, the ceramic resonator should not be placed next to the push buttons.

This computer contains specifications including 1 voice command, 1K word program memory, program replacement by PIC replacement, 68 bytes RAM, 2×20 Character LCD display, 2 input keys, and 64 bytes EEPROM.

Rest of the project