12v Lead Acid Battery Discharge Protection

266

05:17:23

Protection circuit for 12V lead acid battery from over discharging. Just select 12V source and start dropping it's voltage, at 11 volts it will cut off the output supply and stop battery from further draining. Increase in battery voltage will result in circuit re operational and you'll see LED glowing again.
Thanks @hurz for Voltage reference correction

published 8 years ago

Zurkster

8 years ago

Nice.

hurz

8 years ago

A little problematic is that your zener reference is always a little lower then the battery voltage itself, cuz you take directly the bat voltage which is the highest voltage you have. If you scale both voltages first to something close to e.g. bat/2 it works much better http://everycircuit.com/circuit/5755427611738112

pkdon124

8 years ago

@hurz Thanks.. Point Noted.. Will Add Changes😊

Caldari

8 years ago

Good work :)

tankmdg

7 years ago

Looks like will cit off but battery still drains its self?

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