Questions tagged [ups]
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.
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Automobile 12V UPS circuit with Li ion battery
Currently I have a battery backup circuit for a GPS device to run on automobile power source and I am trying to improve a few things. Any help is appreciated.
Currently I am facing issues of negative ...
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Checking battery capacity of 7 amp 12 volt AGM batteries for UPS
I have several 1000 watt Triplite sinewave UPS. The batteries had a date code of 2021 and testing with an 800 watt resistive load ,two heat guns,I was getting around 3 minutes run time,specs state ...
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5v DC battery backup circuit
I am trying to design a backup battery circuit with a power input from a motor generator, and I have come up with the circuit below, For now I am unsure of the best option to deal with any excess ...
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How does the "earthing" system works in a UPS
PLEASE SEE EDIT 1
I want to know how exactly the earthing system works in a UPS, an example with by the ECOFlow RIVER 2. From their webpage it seems so simple, you charge the battery, switch the AC, ...
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Fan noise due to Harmonics while running on UPS?
When mains is not available, ceiling fan will run on UPS and create a different sound/noise. I know that it is due to harmonics. But how can we remove this noise?
By getting a high quality inverter, ...
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Shut down raspberry when unplugged from power thanks to a battery
Context and objective
I need to properly shut down a Raspberry Pi Zero 2 W when it is (physically) unplugged from the power and power it on again automatically when it is plugged back.
The basic idea ...
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What is the purpose of the 4 diodes in this circuit?
I'm working on a mini UPS for my router (12V, 1A) and modem (5V, 2.5A). I've been checking out lots of DIY UPS tutorials and stumbled upon this one. It seems to do everything I need: it's got a ...
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Ceiling fan to run on UPS ONLY [closed]
I have my room typically connected on a UPS.
During a power failure, the devices on the lighting line (5 A) are powered by the UPS.
I have an air conditioner installed in my room which is on the ...
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Get power for driver circuitry in an inverter
Planning to build an inverter based on egs002, I got high voltage high frequency side (ferrite core transformer including N-MOS and high speed rectifier) from old UPS board which I will drive using ...
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Repurpose APC UPS with Solar Panel as DC-AC Inverter, what changes needed
Firstly I have these items lying around,
330W 24V Solar Panel, APC Back-UPS Pro 1000VA/600W with dead battery
Wanted to see if I can repurpose this UPS circuitry to utilize solar panel during day time ...
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Can I add batteries in parallel to my UPS to get longer run time on battery [closed]
I have an uninterruptible power supply which powers my PC, monitor, and WiFi router. My question is: can I add a second pair of batteries to the UPS to get more run time on batteries without damaging ...
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Does DC-DC 24V-12V waste less power than AC-DC 220V-12V?
I am modifying an existing UPS to allow for a longer backup time. I plan on adding a cooling fan along with an external current controlled power supply to charge the larger batteries. There are some ...
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Is back flow from UPS inverter normal?
I have a pure sine wave UPS / inverter for the combi boiler, and noticed a weird thing. That kind of UPS that has a big heavy transformer inside that is connected to a big car / truck battery. If I ...
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Alternate power supply for dashcam, with latching relay
I am trying to setup dashcam with a dedicated battery for my car, I have a crude diagram to explain my logic. Yet to figure out detailed specs.
The dashcam will run as usual car's ignition power, when ...
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How to design an inductor for the output of a low-pass filter for a 10 kVA sinusoidal UPS
The problem is that I have a 10 kVA sinusoidal UPS to repair and after replacing all the IGBTs and other components, I noticed that the low-pass filter output inductor is getting very hot at around ...
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