This setting appears elsewhere in this section. This was obtained from Texas documentation from the 90s. The activation time is given by R1 and C1 and in this case it is in the order of a few minutes.
The figure shows how to implement an alarm buzzer in an LM3914 to warn about crossing the scale...
This circuit can act as a shield being controlled by a microcontroller by pin 1 or 2. The...
This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals...