Many security-alarm systems require the use of a random number. A computer program uses this random number to create a sequence of random numbers to prevent unwanted visitors from gaining entry into a ...

Fig 1. Core memory used to be ubiquitous. Fig 2. Texas Instruments’ 16-bit MSP430FR57xx looks like most microcontrollers except it only has one memory block. Magnetic memory such as core memory used ...

When working on digital circuits that operate at high frequencies it helps to have some special tools on hand. Things like oscilloscopes and logic analyzers are priceless when something isn’t working ...

The Atmel AVR microcontroller ATtiny2313 or AT90S2313 is used to build an electronic combination lock known as Code Lock, which will be used for access control. The Atmel AVR microcontroller ...

Many of us know the basic Blink Arduino sketch, or have coded similar routines on other microcontrollers. Flashing an LED on and off—it doesn’t get much simpler than that. But how big should a blink ...