Host page: | microcontroller-projects:electronic-circuits:matrix-keypad-scan-decode |
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Keypad Scan Uses Few I/O Lines | |
Keypad Scan Uses Few I/O Lines, Decoding Keypad Buttons, Scan to Decode Matrix of Keypad Switches | |
A technique known as Charlieplexing, involving clever use of diodes and keypad switches while alternating I/O lines between output drive and input sensing, is used to efficiently decode an array of keypad switches | |
Image caption: | switch_read_2.png |
Image path: | microcontroller-projects:electronic-circuits:switch_read_2.png |
Date | 2012-08-28 04:33 |
Filename | switch_read_2.png |
Format | PNG |
Size | 940B |