Lead Acid Battery Protector
Published in issue 7/2009 on page 75
The circuit described here can be used to ensure that a 12 V sealed lead acid (SLA) gel battery isn't discharged too deeply. The principal part of the circuit is a bistable relay, which is driven by the output of an op amp.
Downloading of this magazine article is reserved to Elektor Members only. To become a Member, go to www.elektor.com/subs.