If you’ve scavenged some random keypads and want to reuse them in a project without the hassle of figuring out the pinouts, then [Cliff Biffle] has an interface module for you. The Keypad Go connects ...

This idea builds on a previous IFD, "Connect Any Keypad With Any Microcontroller Using Only One Pin" (electronic design, May 1, 1998, p. 126), where a 555 timer connects a keypad switch matrix to a ...

The AT-VKP-8E provides IP-based system control in environments where a straightforward keypad interface is preferred, such as standard classrooms and small meeting spaces. When you purchase through ...

In most keypads, pressing a key closes a contact that bridges two lines in an xy matrix. If you use a microcontroller to detect a key closure, checking the states of (x+y) lines requires an equal ...

APEM offers total control panel assembly solutions with silicone keypad interface. APEM Components, Inc., a manufacturer of quality switches and joysticks, has announced the availability of total ...

Often in the use of products with keypads, one or more keys become “stuck” or are being pressed. For example, a cell phone in the bottom of a purse or in a hip pocket could have one or more of its ...