All Questions
Tagged with ac-dc battery-charging
11
questions
0
votes
2
answers
75
views
NiMH battery charging problem
I have a battery (8 cells in series, NiMH AA cells (1.2 V to 1.3 V), 1300 mAh per cell).
Cells used-
https://www.amazon.in/Rechargeable-NiMH-2300-Peak-Power/dp/B01MF8HUKO
https://www.amazon.in/...
0
votes
0
answers
93
views
Variable input 208V-600V AC to 24V DC without transformer
The Question:
How can I design a circuit for an automatic transfer switch that accepts 120V-600VAC and keeps some 24V batteries charged (long term trickle charge is fine). P.S. I would like to keep ...
- 1
1
vote
2
answers
1k
views
Reusing a HP laptop charger of 3 wires (logic inside)
I have an HP laptop charger 18.5v 3.5A (1X2057... WBGST0A...)
In the past the charger was working fine and I removed the tip for an experiment, so I can't check wires measuring the original tip.
Wires ...
- 155
1
vote
0
answers
63
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How does this circuit convert AC to DC? [duplicate]
I'm trying to understand this circuit taken from a rechargeable flashlight. There's a 4V sealed lead-acid battery (not shown in the images) that gets charged when you connect the flashlight to 230V AC....
0
votes
0
answers
57
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220V AC/DC converter on 110V circuit
I have an AC/DC converter:
input AC 220-240V 50/60Hz
output DC 3.6-10.8V 1.5A.
It is a charger for an electric drill battery (Li-ion 10.8V 4Ah).
What would happen if I were to plug this converter ...
- 145
4
votes
1
answer
727
views
Different Wattage Solar Panels for Home [different Voltage/Ampere]
My current solar system for home
12V 100W polycrystalline Solar Panel.
12V 75Ah Lead Acid solar tubular Battery.
PWM 12V 10A Solar Charge Controller.
12V Input and 200VA Output Inverter.
Current ...
- 41
0
votes
7
answers
8k
views
Calculate the electric bill of a phone charger (AC adapter input or output?)
I need to calculate the amount of money I pay for charging my phone with this charger
I know that I need to calculate the watts then kWh, so I multiplied 5 V by 1.55 A to get 7.75 watts and then use ...
- 5
0
votes
1
answer
76
views
Back Up Battery System Design
So I’m trying to design an AC/DC convertor for a test unit that will go inside of an environmental chamber, but I’m also trying to build in a battery backup charger and switcher circuit, in the event ...
- 1
2
votes
1
answer
316
views
Battery charger output power higher than input?
i would like to ask about battery charger i saw at work :) the plate on charger says:
Input voltage 3 phase ac
Min 400v
Nominal 400-415v
Max 456v
Input current
20A
Output
110v DC 9kW
28v DC 3kW
...
- 173
4
votes
1
answer
3k
views
Can AC/DC conversion losses from solar panels be avoided with a Tesla Powerwall?
(background: I'm just playing with numbers, trying to estimate how many solar panels would be needed to fully supply the energy for a home and 2 Tesla cars)
I've been reading up on solar panels and ...
- 223
-2
votes
1
answer
2k
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Is there a rightside up when plugging in an AC to DC power converter? [closed]
When plugging an AC to DC converter into an AC outlet, does it make any difference at all if the wall wort is "upside down" or "rightside up"? Is there anything about the electrical design that would ...
