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Host page:	microcontroller-projects:electronic-circuits:matrix-keypad-scan-decode
	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

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