Extending the basic configuration, this circuit interfaces 12 switches using only four I/O pins of a microcontroller
| Authors | Kartik Joshi |
| Main Document | Article «Novel Switch Interface Scheme Reduces Microprocessor Pin Count» |
| Description | Figure 2 |
| File Format / Size | PDF / 23 Kb |
| Document Language | English |
Other Materials from the Main Document
- Article «Novel Switch Interface Scheme Reduces Microprocessor Pin Count»
- Figure 1. Starting with this basic configuration, the improved switch interface technique can be scaled as needed
- Figure 2. Extending the basic configuration, this circuit interfaces 12 switches using only four I/O pins of a microcontroller
- Figure 3. The 12-switch arrangement can be used to interface a numeric keypad to a microcontroller, in this case, an ATmega8
