Questions tagged [charger]
A device which controls the voltage and current being delivered to a capacitor or battery.
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Battery to AC conversion of faucet IR sensor
I bought this faucet which includes a hand IR sensor, but it's battery powered. I wanted to convert it to AC power using this excellent Video as a guide. Since it takes 4 AA batteries, I bought an old ...
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2answers
26 views
Battery temperature charging cutoff protection methods
We have run into a requirement where we need to terminate the charging of our Lithium Polymer battery when the battery temperature exceeds the manufacturer rated temperature.
My immediate reaction is ...
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1answer
62 views
Is this a capacitor or a varistor? How can I figure out specifics?
Is this a capacitor or a varistor? How can I figure out specifics?
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Li-Ion/Li-Polymer Battery Charger mcp73871-2cci/ml Issue
Hope someone can help. I have designed a pcb board based on the mcp73871-2cci/ml. No matter what I change there is no current draw and all the indication LED’s remain on. I have seen some example ...
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2answers
88 views
How do I wire up an aftermarket USB Type-C connector so that it works?
I recently broke the male port of my USB-C laptop charger. I already got a new one, but I would like to fix and repurpose the old one to be the power for my Raspberry Pi 4 instead of throwing it out.
...
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1answer
56 views
When is it appropriate to use a dedicated charging ic and when is it appropriate to use a microcontroller? [closed]
To give a little more context, I am designing a device that requires a battery to be charged. What I gather from most commercial designs and reference designs, is that they often use a dedicated ...
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24 views
MCP73871 and Mosfet Power Switch
I use MCP73871 battery charger,
Battery and VDC (charge voltage) connected to MCP73871.
VFEED is the output voltage of MCP73871.
Circuit also have a MOSFET power switch.
VFEED enters the MOSFET and ...
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3answers
37 views
Can i charge 18650 li ion battery by using transformerless power supply?
My question is very simple, can i charge 18650 li-ion cell by using transformer-less power supply. this transformer-less power supply convert AC current to DC current by using just capacitor, resistor ...
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1answer
62 views
How does a desktop charging station decide its output voltage? [duplicate]
I have this charger:
http://www.shintaro.com.au/product/shintaro-multi-device-charger/
It supports QC3.0 and has:
...
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24 views
Will USB-PD work with and extension cable in the circuit?
I want to replace the USB type A port on my trucks dash with a USB-C panel mount and give it the ability to "fast charge" my phone. Unless there is a product that I am overlooking it seems I ...
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2answers
59 views
Lithium ion battery CV mode
I am working on lithium ion batteries charging(NMC chemistry, max charge voltage is 4.2). In charging mode after cell reaching 4.2V, charger is going to CV mode and after this Charge ends(based on ...
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Damaged Bosch battery charger IC identification help
I accidentally damaged my Bosch cordless drill battery charger by hooking the charger's PCB's 12 volt lines directly to the 220V|50Hz AC mains.
The charger's model is AL 1110 CV https://www.amazon.co....
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56 views
Does a USB PD source supply any voltage to a non USB PD compliant USB C device? If yes, how much?
I have a 40W USB PD compliant charger from my ultrabook. I recently bought a pair of headphones (Sony WH-1000XM4) which can be charged using a USB C Plug. Sadly I can not find in the specifications of ...
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21 views
Solar Mobile Phone Charging Project
I have a Solar Panel of Rated Voltage = 8.95V & Rated Current = 0.34A, I want to make a phone charger with output of 5V & 2A, Please Help!, this is my 1st project.
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1answer
74 views
Is it safe to use an “18v ~ 20v” power brick/adapter for a device that originally had an 18v adapter?
We have a device that uses an 18v adapter/power brick, unfortunately the adapter broke. As a replacement, we are considering an adapter that has a "18v ~ 20v" rating printed on its back. ...
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1answer
57 views
Is charger with USB C connector and 13V output in line with standards?
I have bought cordless rotary tool. The charger which is included in the package is equipped with USB-C connetor, and the charger has rated output at 13V @ 1.5A.
Is this "legal" according to ...
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2answers
28 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 ...
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1answer
56 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, ...
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1answer
36 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
69 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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42 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 ?
!
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1answer
54 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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56 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
53 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 ...
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1answer
34 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 ...
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1answer
50 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 ...
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1answer
62 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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47 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 ...
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2answers
51 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 ...
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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)?
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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
140 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 ...
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1answer
28 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 ...
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2answers
64 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 ...
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31 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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34 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
51 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 ...
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0answers
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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
51 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 ...
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1answer
147 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 ...
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2answers
80 views
Why don't the current readings 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 13 mA. I noticed that even ...
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0answers
18 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 ...
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2answers
59 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 ...
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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 ...
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2answers
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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
49 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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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 ...
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2answers
60 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 ...
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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 ...
