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 ...

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 ...

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 ...

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 ...

Traditionally, interfacing a microcontroller with an n-by-m keypad required n + m of the microcontroller's I/O pins for keypad scanning. Keypad designs that conserve microcontroller pins have been ...

A previous Design Idea described a single-wire-plus-ground-return, keypad-to-microcontroller interface in which a single pulse represents each keystroke (Reference 1). The pulse's width is ...

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 ...

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 ...

During 2015 Storm introduced the first in a new generation of toughened access control keypads featuring HID® iCLASS® and SEOS® contactless technology. These products are now available from the ...

NEC was showing off some conceptual stuff at CeBIT this year and when we caught sight of what looked like a mobile phone, we hustled over to get a look. Upon closer inspection what they were actually ...