Simple Under Voltage Detect

Try connecting a 100kΩ to 1 megΩ resistor between the base of Q1 and the collector of Q1 to add some positive feedback hysteresis.
Adjust the value until you get the desired response.

Hi thanks for the input.

Is it from Q2 collector to Base of Q1?

Or

Is it from Q1 collector to Base of Q1?
 
Sorry.
It's from the base of Q1 to the collector of Q2.
 
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