newbieXperimenter5960
New Member
I have a simple 12 volt battery backup device. As long as power is being supplied via an AC / DC adapter, the relay keeps the backup from working.
The circuit is being powered by a 3000 mAH ni-cad battery pack. The sensing part works great and indicates when the battery voltage drops to about 10 vdc (I can change this). What I would like to do is have the sensing circuit switch to charging the batteries. Here is what I understand. If the sensing circuit switches power from the adapter to charge the batteries, then it will now "see" a full 12 volts and stop charging. Then, re-see that the batteries are low and turn the charging back on. An oscillation loop. How do you prevent this?
The circuit is being powered by a 3000 mAH ni-cad battery pack. The sensing part works great and indicates when the battery voltage drops to about 10 vdc (I can change this). What I would like to do is have the sensing circuit switch to charging the batteries. Here is what I understand. If the sensing circuit switches power from the adapter to charge the batteries, then it will now "see" a full 12 volts and stop charging. Then, re-see that the batteries are low and turn the charging back on. An oscillation loop. How do you prevent this?