512 2 digit minute timer
512 : 2 digit minute timer
- Author: Anna V
- Description: countdown timer in minutes
- GitHub repository
- Open in 3D viewer
- Clock: 0 Hz
How it works
Once the switch is flipped, the display decreases by 1 with every 6000000 ticks of the 100khz clock, or 1 minute, until it reaches 0.
How to test
Access The Wokwi Simulation With This Link: https://wokwi.com/projects/455966163101749249 Make sure the switch is turned off. Then press the button until the display shows the desired number of minutes you want to time. Then flip the switch and watch it count down to 0!
External hardware
The circuit uses a 2+ digit common cathode seven seg display, a button, and a 3 pin switch.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | clk | a | dig1 |
| 1 | button | b | dig2 |
| 2 | switch | c | |
| 3 | d | ||
| 4 | e | ||
| 5 | f | ||
| 6 | g | ||
| 7 |