Scoreboard Progress Thus Far....

This is an ongoing personal project for 3 yrs.

This project contains a 555 timer which the output connects to the CLK pin of the asynchronous bidirectional counter. The output of the counter goes to the input of the 7 segment latch decoder. Each pins of the output goes through a 680 ohms resistor and to the 7 segment cathode display.

The counting is dictated by two buttons which are connected to ground and contains a pull up resistor. Both buttons goes through the XOR gate and to the ENT pin of the counter which dictates whether to enable counting or not. One of the buttons goes through the NOT gate and to the input of the OR gate while the other buttons go to the input of the OR gate. The output of the OR gate goes to the UP/DOWN pin of the counter.