Figure 1 This circuit for a 4×3 keyboard shows a more efficient architecture using two CD4017 Johnson counters with only two I/O pins. The example described here showshow to implement this method to ...

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 ...

[youtube= The guys at Nerdkits have put together this tutorial on connecting a PS/2 keyboard to a microcontroller. Though this tutorial is written for one of the kits they sell, you should be able … ...

San Jose, Calif.&#8212Renesas Technology says its RNA50C27AUS is the industry's first reset IC that incorporates a core power-on sequencing function for microcontrollers that operate core logic ...