290 JBs first chip
290 : JBs first chip
- Author: JB Morch
- Description: 8-bit counter
- GitHub repository
- Open in 3D viewer
- View in Wokwi
- Clock: 0 Hz
How it works
The goal is to create an 8-line counter, similar to a TI CD4022B decade counter with 8 outputs.
How to test
Set enable to high and pulse the clock input with a square wave. NOTE the enable is not working. It will always be enabled.
External hardware
Use a microcontroller (like an Arduino or ESP32 module) to control the clock. Send the outputs to the individual segments of a 7-segment LED display (with the optional 8th segment that is the decimal point).
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | Enable (n/a) | Output 0 | Carry Out |
| 1 | Output 1 | ||
| 2 | Output 2 | ||
| 3 | Output 3 | ||
| 4 | Output 4 | ||
| 5 | Output 5 | ||
| 6 | Output 6 | ||
| 7 | Output 7 |