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1 vote
1 answer
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Cheapest way to detect low voltage of a battery

I have 29V battery which drops to 24V at about 30% capacity. I want to detect when the battery goes lower than 24V and generate a 12V signal. (I have 12V auxiliary supply for lights etc) Since I'm ...
across's user avatar
  • 1,150
0 votes
1 answer
496 views

Q: Can I use the LM3914 voltage indicator IC as a low-voltage cutoff device?

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 ...
Boloar's user avatar
  • 127
1 vote
1 answer
3k views

Battery cutoff circuit with NE555

For a project, I need a simple battery cutoff circuit for protecting a 9V battery from over-discharging. (by simple, I mean with only a few off the shelf components, and no micro-controllers) Looking ...
Macmade's user avatar
  • 291