Let’s rollback the hobby electronics calendar a few decades with [myvideoisonutube’s] alarm activation control circuit using a matrix style phone keypad. The circuit is quite old using CMOS 4081 with ...

As keyboards continue to grow smaller and slimmer in size, the alpha numeric keypad is usually the first casualty. For engineers, accountants, and other professionals who spend their days crunching ...

Crunching numbers on excel or other data processing tools is easy, as long as you have a comfortable numeric keypad by your side. Why? Well, for starters, ergonomic numeric keypads have a unique tilt ...