Scoreboard Display
A simple project that counts the number of times you've pressed the button. Can be used as a scoreboard display for a game. Or to keep tracks of things like how many cups of coffee you've had today.
The Circuit
The CD4026 is a pulse counter that outputs signals to control a 7-segment to display the result. For each button press, the CD4026 counts up.
The resistors R1-R7 sets the current for the LED segments in the display. R8 is there to keep the counter input LOW when the pushbutton is not pressed.
Parts List
R1
390
R2
390
R3
390
R4
390
R5
390
R6
390
R7
390
R8
100k
SW1
Pushbutton
U1
CD4026
U2
7-Segment Display
The Layout
This circuit has a lot of connections and it's easy to make a mistake. Here's an example of how you can build this circuit on a breadboard:
