This circuit accurately monitors a 5 V TTL source. The circuit is from National Semiconductor's Linear Applications Handbook.
January 2017 - Mouser Electronics already has the new Ultra Low Drop controllers from Toshiba...
This circuit is from a 1998 Poptronics. The circuit triggers a buzzer after a certain time, waking...
Found in a Radio Electronics from May 1964, this circuit activates a relay depending on the supply...