Questions tagged [charger]
A device which controls the voltage and current being delivered to a capacitor or battery.
683
questions
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30 views
High Current SEPIC Converter (100 Amps, 800 Watts) [closed]
As I understand it, SEPIC converters are a possible means to connect a solar generator to an array of paralelly connected lead acid batteries.
However, the peak current of the system is around 40 Amps ...
2
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2answers
25 views
Chaining TP4056 modules, the proper way
I know a similar question was asked before, but still, it didn't aswer what I'm looking for.
I need to charge a series of 6 Li-ion cells, and maybe 12 in the future for a voltage hungry project. Since ...
1
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1answer
52 views
How to avoid AC in cheap DC charger
I bought a cheap DC charger a couple of days back and I have been using it to charge my headphones and other small electronics.
I recently noticed that there is small amount of AC, less than 1V, ...
0
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1answer
31 views
Can i charge an LiFePo4 32650 cell using an 18650 li-ion charger
i have this li-ion 18650 charger i found, pic attached below. I need to know if i can use this to charge a LiFePo4 32650 cell i bought here, the cell doesnt fit in due to the obvious differences in ...
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1answer
66 views
Maximum Power Point Tracker (MPPT) charge controller - what drives the weight?
I'm having trouble finding any literature paper that studies this problem. What drives the weight of an MPPT charge controller? How would I go about reducing that weight if I had to design a custom ...
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0answers
40 views
Charging nicd battery with pwm
Hi I plan to build charger circuit to charge high capacity nicd battery. The charger will output 40A , is it safe to limit and reduce the current using pwm IGBT/mosfet so the output will be pulse ?
!
1
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1answer
52 views
Can I use a lithium charger for a bluetooth speaker with a NiMH battery? [closed]
I have a BlueAnt bt blast bluetooth speaker that I need a new charger for. It says DC 12V on the back by the power supply. I checked the manual and this speaker has a NiMH rechargeable battery. Can I ...
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0answers
55 views
BMS battery build DIY help
I am making a battery charger for a speaker using 4 18650 3.7V batteries.
Now I know that I would need to get a 4S Lipo or Li-ion PCB, the only thing I don't understand is the current rating that I ...
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2answers
51 views
Charging batteries with a PCB Charger
I have a 4 slot battery holder with 2 wires coming out of it, best I can describe it. I'm planning to get a 14.8V Li-ion PCB charger (of course this will be used with 3.7V Li-ion batteries).
One thing ...
0
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1answer
33 views
AC divider circuit used to charge a capacitor
The following circuit uses a capacitive divider network along with a diode rectifier to charge a capacitor. I assumed that once C2 is charged to its maximum( calculated to be around 14mV) the diode ...
3
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1answer
47 views
Battery/Charger Not Reaching Float with Load Attached
I'm trying to add a backup/UPS to a system I have outside with the following battery charger - https://www.meanwell.com/Upload/PDF/ENC-180/ENC-180-SPEC.PDF . The DIP switches are set for AGM mode.
My ...
0
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1answer
60 views
How to identify transformer pin out in genuine mobile charger?
can't find any information about it on Internet ,does there any practical procedure to identify, like removing it from circuit and measuring its coils resistance.
or a website that i can find ...
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0answers
44 views
USB-C charging cable for Nintendo Switch
I am trying to change a broken USB-c charger connector for a nintendo switch by changing the male end connector. The charger cable has 5 wires 2 red(Vbus) 2 Black (GND) and a small white cable that ...
0
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2answers
49 views
Battery Discharged - But Potential difference exists without any current flow
My below question is regarding batteries.
I have a USB charger and a mobile battery (Li-ion battery).
So, my mobile battery percentage has dropped to 0%.
So, what I do now - Take the USB Charger. Plug ...
1
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1answer
43 views
On Samsung mobile phones, how does its USB host know when to charge the phone and when to power the connected device?
How do mobile phones (Samsung, in particular) distinguish between being charged and having to power the connected USB device (i.e. flash memory stick)?
0
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1answer
74 views
How does this circuit work? (TP4056, DW01)
Why are capacitors C13, C12, R20 used here?
And why resistor R18 and C5? (What function do they perform?)
I don't understand why they are installed there.
Datasheet:
TP4056,
DW01,
FS8205A.
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1answer
103 views
Lithium Battery Charger using LM317
I have come across the following circuit in a datasheet for a battery charger:
I have also seen a similar use of the charging circuit for use as a lithium battery charger, e.g http://shdesigns.org/...
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2answers
44 views
Proper algorithm to charge LiPo batteries
We are going to develop a new LiPo battery UPS circuit for our handheld. I have read couple of articles and almost all of them recommend to charge the battery based on the following curve. I have also ...
0
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1answer
25 views
Limit Voltage to Load
In this circuit, either the battery or the charger will be powering the load depending on the voltage of the battery. The problem is that both battery and charger can potentially be 16.8 V sources and ...
0
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2answers
61 views
Boost Converter Stuck at Around 80 Volts
I'm building a boost converter that utilizes a 555 timer switching at 60 kHz at a 96% duty cycle which drives an IRF3205 MOSFET to power a hand wound inductor (calculated to have ~330 uH) with a 6A10 ...
0
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0answers
28 views
Laptop charger voltage decreases gradually when plugged in, laptop won't charge
Recently, I tried to charge a laptop I had not used in a long time, but it didn't work.
I took out a multimeter and measured the voltage coming out of the laptop charger, a Delta Electronics charger ...
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0answers
33 views
Reduce 50 Hz noise from robot-mower charger
I just bought a robot-lawnmower (Husqvarna Automower 105), which is working perfectly.
But the charging station is making a loud 50 Hz noise all the time, even without the robot charging.
I have ...
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0answers
44 views
Solar Li-Ion Charging with load-sharing
I need some help regarding my project. I have made a dog feeder with Arduino Uno, which is powered with a 3000mAh Li-Ion battery. I want the system to be charged with a solar panel (more solar panels ...
0
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0answers
26 views
Ericsson T20 battery charging circuit details
My question is simple, does anyone know what IC and FET was used to charge the battery of Ericsson T20 phone?; I have a dozen of these small battery charging boards and I can't find the IC/FET by ...
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1answer
47 views
protection IC stopping battery from charging
So, I'm using an AP9101C as protection IC and MCP73811 as a charger IC for a single cell lipo like this:
The load works fine and when I connect +VDC (5V), suddenly CO of AP9101C goes to 0 preventing ...
0
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1answer
136 views
Why is my self built LiFePO4 battery pack not charging?
[NOTE]
I understand that the adapter that I bought for my battery pack is not actually a charger. I also understand that it could be dangerous what I'm doing. I still wonder why there is no current ...
0
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2answers
63 views
Why doesn't current fall to zero after unplugging the charger? [closed]
I use an automatic charger to charge my lead acid battery. After the battery is fully charged, it shifts to maintain mode, where the charging current reduces to as low as 13mA. I noticed that even ...
0
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0answers
17 views
Field charger setup with either/or dc supply
I have a lithium polymer battery charging setup that has the charger in a box with 2 dc power supplies wired in series to create 24V. The power supplies are Meanwell LRS-12-350. Currently there is an ...
0
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2answers
52 views
How to charge an android device with a buck converter
I've got a male micro USB connector like this one
I'm feeding the output of a buck converter set at 5V to pin 1 positive and pin 5 negative. Remaining pins are not connected. When I plug the ...
0
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2answers
67 views
Do high voltage low amperage motors exist?
I have an idea, which is essentially using the power running down an electrified electric fence to move a stretch of wire between two fences.
I have been trying to find if it is even possible to have ...
0
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2answers
76 views
could this be a fuse?
I was so stupid to leave a Ring rsc 516 smart charger in the rain. Hopefully, only the fuse is blown.
However, I am not sure where the fuse is?
could it be the black thing on the photo?
I did a ...
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1answer
46 views
Reversing the input of a transistor
I want to detect if a 12V DC line has power or not. I want the transistor to work like this: If pin 2 has 5-12V, pin 1 and 3 should be disconnected and should stop the flow of 5V 2A across pin 1 and 3....
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0answers
46 views
How to charge multiple 3.7V LiPo batteries in parallel?
let's say I have 4x 3.7V LiPo batteries connected parallel.
I want to use TP4056 charger boards to charge them. (see picture)
As a power supply, I use a 5V 15A adapter, so there is plenty of power ...
0
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2answers
44 views
Simultaneously Charge and Discharge a LiPo
I have what seems to be a rather common problem, a circuit in which i wish to be able to simultaneously charge and discharge (use) a LiPo battery. The "charge" going "into" the ...
0
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0answers
17 views
How to repair the charger pin when it got stuck in the switch
My laptop charger got stuck in the pin hole while it was charging and its put a dent on my charger .I removed the pin and would like to repair it.
I tried gluing the pin using a permanent glue and ...
0
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1answer
27 views
Question regarding a charger modification for a Dell 3100 docking station
I'm quite new and inexperienced to this so I would appreciate any guidance I can get.
Given the quarantine situation I need to work from home more so I purchased a used D3100 docking station but with ...
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1answer
102 views
Is this a float charger or trickle charger?
Below is a simple charging circuit using LM317 and BC547 and it is mostly classified as a float charger in many forums. This seems to reduce the current flow when the battery is fully charged, however ...
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2answers
92 views
Li-ion battery charging termination current
I have almost no experience with Li-Ion charging.
Documentation to battery is very poor, but there is an info about charging profile:
Stage 1: Constant Current 0.82 Ampere (0.2C) until Voltage ...
0
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0answers
58 views
Always plugged in solution with battery backup
I am trying to design an micro-controller based solution which is always plugged in and has a battery backup in case of power failure. I am using an SMPS power supply rated 15V, 1.4A which is always ...
2
votes
1answer
110 views
Converting USB 2.0 charger to USB C
We have a typical USB 2.0 wall charger that has a USB A receptacle. Our charger has D+/D- connected together through a small resisor (<200Ī©) to let devices know the maximum power is 1.5A/5V ...
0
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0answers
30 views
Use old battery pack charger as DC power supply?
I have an old charger for NiCd battery packs. It is labeled with:
Input: 230 V~, 50/60 Hz, 33 W
Output: 4.8 - 12 V DC, 1.4 A
I opened it and found a transformer and two circuit boards. I made a ...
0
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0answers
110 views
How to use MCP73831 with multiple voltage sources correctly?
I'm trying to use an MCP73831 with multiple voltage sources (one is from a 24VDC to 5 VDC regulator, the other one is from a standard USB) but I'm having a bit of a problem.
For the moment, I'm only ...
0
votes
3answers
83 views
Using laptop charger with slightly higher voltage
I am wondering if it is safe to use a MacBook charger on my Lenovo laptop. Both devices charge via USB C PD. When looking at the voltages I can see that the Lenovo adapter is 20V - 3.25A
The MacBook ...
0
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1answer
92 views
What is wrong with my USB Li-Ion charging circuit?
I'm trying to design my own PCB based off of this one:
My relevant schematics are here:
Their Q3 transistor DMG3415U-7 was going obsolete, so I used DMP2045U-7, which seemed to be a similar ...
0
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2answers
49 views
Using a “Normal” powerbank for a “Super Fast Charging” phone, are there any potential damages?
I have an Anker Redux 10000 mAh powerbank and a Samsung Note 10 Lite smartphone.
My powerbank is capable of providing an output of 5V ā 2.4A, with only "normal" charging mode (no QuickCharge or other ...
0
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1answer
53 views
What charger for a 13s10p Li-ion battery pack?
I plan to make a battery pack for my vehicle, 13s10p Li-ion battery. It gives me 30Ah.
If one battery can be charged at 1A, can I charge 10 batteries in parallel at 10A?
For now I have a 2A ...
0
votes
1answer
67 views
Solar charger for Lipo battery
Im trying to build a little solar charger for a Li-po battery using
2 solar panels rated at 6V/120mA
a linear charger based on the TP4056 chip
The idea is to connect the two panels in paralel so ...
0
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0answers
68 views
Connecting multiple chargers to a lead acid battery
I have a scenario where I want to connect an external battery charger to an alarm system's battery to keep it charged fully despite our country's frequent rolling blackouts. The battery is a larger ...
1
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3answers
78 views
How to drop 5v regular phone charger voltage to 3.7v to run a device, which use 3.7v output battery before
I have Motorola Moto 360 2st edition smartwatch and watch original battery is dead. I have converted smartwatch into table watch in DIY wooden block and added 18650 3.7v battery instead and now its ...
0
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0answers
64 views
Charge a car battery from 14V 20A Max - how to limit current?
Could anyone point me in the direction how I would make a circuit to charge a large car battery from an alternator (say 12.5 to 14.5v) depending upon state of charge of the main battery, but it needs ...
