Hi. I get this "Keypad LCD Shield V2.0 -Arduino Compatible" from emartee : http://emartee.com/product/42054/Arduino%20Keypad%20LCD%20Shield%20V2.0 I'd like to switch it off to save battery but when I cut off the 5V power attached to VDD of the LCD, the written data on the LCD go off, but the back…

How to switch off Keypad LCD Shield V2.0 -Arduino Compatible

johnwasser April 17, 2012, 7:38pm 2

Try setting RS, EN, D4, D5, D6, and D7 to LOW in addition to turning off Vdd.

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