Difference between revisions of "AVR Interfacing:Hex Kepad"
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| − | + | Let's look at interfacing a Hex keypad, the one with 16 switches; arranged in 4 columns and 4 rows. The interesting challenge is to interface 16 switches on 8 pins. | |
| − | + | So how does this work? The simple answer is the MCU is faster than the your fingers. | |
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Revision as of 10:08, 24 March 2016
Let's look at interfacing a Hex keypad, the one with 16 switches; arranged in 4 columns and 4 rows. The interesting challenge is to interface 16 switches on 8 pins. So how does this work? The simple answer is the MCU is faster than the your fingers.