I want to create UPS, an uninterruptible power supply, for my arduino and raspberry pi, both 5-6v, and a linear actuator, 12v. I was thinking about using this M8585 or this M8572 along with a battery,
. Then use the 12v output from the M8585, to directly power my 12v linear actuator and use a stepperdown 12v to 6v from the same output to power the arduino. They recommend this transformer M2170L or similar, from same website. In the instructions they also recommend using this fuse, a 500ma ac fuse, along with the transformer. Is that this one, S5714, from same website, they are thinking about?
Do you have any wiring diagrams for such UPS systems? Do I power the transformer directly from 240v ac, then connect the fuse, then connect it to the M8572, or do I need fancy wiring with mosfets etc before I can connect it to the M8572?
Is there any limit to the size of the battery this M8572 can charge? Does it automatically stop charging the battery when it is full and does it stop using the battery when it drops below a certain voltage to prevent damage?
Do I need a fuse for the 12v-5v stepdown transformer for my arduino /raspberry pi? I was thinking about using this module DC-DC Buck Converter XL4015 5A
That is a SLA charger. Think about using a 12V SLA battery floating on about 12.2V from your charger. Use the battery for the actuator and a buck converter to power the Arduino. I generally set them from 7.5 to 8.5 volts output and use the Vin power input. It works great for me and no indication of anytype if the power goes off or on.
You write several times about a fuse. Do you know that a fuse is to keep a circuit from overheating and starting a fire? It can never protect a solid state device in your project. It can't react fast enough.
So, where ever there is a chance of something drawing too much current and causing a fire, that will be the place for a fuse. Between the transformer and the mains power is one good place. Another might be between a charger and a battery.
You need to know the normal current for that circuit in order to select a fuse. A fuse needs to carry the normal current plus a bit more. Fuses are current operated switches that will open up when too much current goes through them for too long of a time.
A good fuse holder is also required and the style will depend on your project.
So I can power it by connecting mains AC to a transformer, then connect it to the SLA charger. then connect the charger to the battery. and connect a buck converter to the 12v output?
I want both 12v and 7v output. Can i connect multiple wires to the output and get 12v on each wire, use one wire to power 12v application and one wire to connect to the buck converter to power arduino, 7v application?
Or would i need seperate battery and sepperate charger for the 12v and the 7v application?
Is it any limit to how many lead acid batteries i can have in parallell?
What would the size of the fuse be betweeen the mains AC 240v and the transformer, is that the 500ma fuse they talk about in the manual?
battery floating on about 12.2V, is this a setting on the charger or the battery or would this happen automatically? In the manual for this charger it says that it will charge the battery and power the 12v output when connected to main, then power the 12v output from battery when the powerconnection to mains is lost. Does this mean that the mains is allways charging the battery and the battery is allways powering the 12v output from the charger or does the current go directly, bypassing the battery and power the 12v output on the charger when the battery is fully charge. It just seems inefficient to charge and discharge the battery continuouosly if the power is conncted to mains?
The M 8587, SLA charger, comes with a 10A fuse, it says. I guess this one is intended to be placed between the transformer and the charger to protect the charger? Then the 500ma fuse, S5714, recommended in the manual for the transformer, M2170L, goes between the mains AC power 240v and the transformer?
transformer, or similar, recommended:
A transformer is a transformer. It converts AC to AC, in your case the output will be 12V AC, not DC.
Can the actuator work on AC? Can that module in the centre of your drawing take AC? If no, you will need to rectify that with a diode bridge and smooth it with a buffer capacitor.
It looks like it is AC input, but im not sure if they mean AC 12v or if they are refering to the AC240V and that you have to convert it to 12V DC first
To help you I would suggest you get a copy of the electronics cookbook from your library or where convenient then read it. You apparently do not have much experience in this field, this book would be a big help, speed your project up and enhance your knowledge.
It looks like four diods on that board tho. mby they convert AC to DC on the board. I cant find the schematics of the board. But they do recommend a transformer and they dont recommend any diods, so it might be that they think you should only buy a transformer?
What makes this thing a lead acid battery charger and not safe to use with for example Li-ion batteries? Would i need to add additional BMS such as this one between the battery and the charger?
