Wikipedia Article of the Day
Randomly selected articles from my personal browsing history
A watchdog timer (WDT, or simply a watchdog), sometimes called a computer operating properly timer (COP timer), is an electronic or software timer that is used to detect and recover from computer malfunctions. Watchdog timers are widely used in computers to facilitate automatic correction of temporary hardware faults, and to prevent errant or malevolent software from disrupting system operation. During normal operation, the computer regularly restarts the watchdog timer to prevent it from elapsing, or "timing out". If, due to a hardware fault or program error, the computer fails to restart the watchdog, the timer will elapse and generate a timeout signal. The timeout signal is used to initiate corrective actions. The corrective actions typically include placing the computer and associated hardware in a safe state and invoking a computer reboot. Microcontrollers often include an integrated, on-chip watchdog. In other computers the watchdog may reside in a nearby chip that connects directly to the CPU, or it may be located on an external expansion card in the computer's chassis.
History
May 26
Bluesky (social network)
May 25
Zero-crossing rate
May 24
Fowler–Noll–Vo hash function
May 23
Fourier inversion theorem
May 22
Pantone
May 21
DigiCert
May 20
Little Boy Blue
May 19
Kim Bauer
May 18
Snowflake ID
May 17
Go (programming language)
May 16
Criticism of C++
May 15
Assembly language
May 14
Pitch detection algorithm
May 13
Ethyl acetate
May 12
Zigbee
May 11
AutoCAD DXF
May 10
Convex function
May 9
Raised-cosine filter
May 8
Boy or girl paradox
May 7
netcat
May 6
Idiot plot
May 5
Blackboard bold
May 4
Zero crossing
May 3
ASCII
May 2
Inverse trigonometric functions
May 1
RAID
Apr 30
Arccos
Apr 29
Real-time operating system
Apr 28
Unidirectional network
Apr 27
SD card