I came across these two circuits, and tried them out successfully:
LM3914 Battery Monitor, drives 10 LEDs in a linear relation to the input voltage.
NE555 Low-Voltage Cutoff, uses a 555 timer to switch off a circuit at low voltage, with hysteresis to prevent uncontrolled switching.
My question is, is it possible to combine the two? That is, use the LED outputs of the LM3914 to control the low-voltage cutoff behavior of the 555 timer?
EDIT Circuit details:
I have a 12V lead acid battery, I want the circuit to automatically cut off power at 11.5V and restore power above 12.5V. With a bit more research, I think I can directly hook up the appropriate LED pins of the LM3914 to the trigger and reset pins of the 555? Can anyone confirm whether that's right?