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A UPS is an Uninterruptible Power Supply that provides backup power when the main power source is lost. Questions on repairing commercial ones are generally off topic.

0 votes
1 answer
217 views

Battery drain on a simple UPS circuit

I've got a question about this very simple 2 diode UPS circuit, using a non-rechargeable battery. …
Turboduinoz's user avatar
5 votes
5 answers
732 views

Is hysteresis needed for this non-inverting comparator?

I’m trying to figure out if the following comparator circuit (TL331) would be reliable in the following application, or whether I would need to add anything, like hysteresis. To explain the applicati …
Turboduinoz's user avatar