Designers can adopt multiple keypad designs while targeting a single device, in order to produce in higher quantities and lower costs. CPLDs can be implemented for general purpose I/O expansion given ...

Using this type of keypad requires multi-tap data entry, which is inefficient and error-prone. One option for making text entry easier is to use a QWERTY keypad (Fig 1). This type of keypad employs 40 ...

One such lock is the keypad lock that allows users to enter a code on a keypad to unlock the lock instead of using a key.

Yale Code keypad lock review: Svelte & affordable, just not smart The smart lock leader focused on price and ease of use to deliver this keypad deadbolt, which doesn't offer wireless connectivity.