In this case, [Jeremy Cook] put one to work as the faceplate for his “742 Clock,” a name that plays on the fact that his seven-segment display is 42 mm tall, plus it’s “24/7” backward.

Anti-tamper real-time clock: make your embedded system secure; Theory of relativity visits “real-time” clock; Getting real with the real-time clock; Crystal-oscillator circuit is ultralow power; How ...

This crystal is common for real-time-clock circuits. Because these circuits must operate at all times, achieving the lowest current draw possible is mandatory. Traditional gate-oscillator circuits—the ...