Hi, new here. I am doing a school project that requires some electronics knowledge, but problem is that I am in mechanical eng. So I need some help and advice on some very basic electronics.
My project requires 3-5A, 12VDC depending on which component I use, and I have an AC adapter with output 5A, 12VDC.
So if I use a peltier with rating of 1.5A, and connect the AC adapter output to the peltier, will it fry the peltier seeing that it only requires 1.5A and I am supplying it with 5A (I asked the store before buying the adapter, the guy says no problem...)
For the peltier, if its rating is 5A but I supply only 1.5A, will it still work? I am assuming the lower current will give a lower heat transfer than at 5A, right?
Another question, what circuit do I need to allow the AC from my home supply to charge my 12VDC batteries while allowing the batteries to power the device at the same time (the batteries are discharging and charging at the same time)?
Also, I need a 12VDC battery that can last for 4 hours. Assuming my device uses 5A, the capacity needed is 20Ah right? What type of batteries can I look into? I tried asking around several electronics store, they do not sell such high capacity batteries. So I might have to make my own battery pack, though I am not sure if Li Ion, LiPo or NiMH is better.
My project requires 3-5A, 12VDC depending on which component I use, and I have an AC adapter with output 5A, 12VDC.
So if I use a peltier with rating of 1.5A, and connect the AC adapter output to the peltier, will it fry the peltier seeing that it only requires 1.5A and I am supplying it with 5A (I asked the store before buying the adapter, the guy says no problem...)
For the peltier, if its rating is 5A but I supply only 1.5A, will it still work? I am assuming the lower current will give a lower heat transfer than at 5A, right?
Another question, what circuit do I need to allow the AC from my home supply to charge my 12VDC batteries while allowing the batteries to power the device at the same time (the batteries are discharging and charging at the same time)?
Also, I need a 12VDC battery that can last for 4 hours. Assuming my device uses 5A, the capacity needed is 20Ah right? What type of batteries can I look into? I tried asking around several electronics store, they do not sell such high capacity batteries. So I might have to make my own battery pack, though I am not sure if Li Ion, LiPo or NiMH is better.
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