Questions tagged [charger]
A device which controls the voltage and current being delivered to a capacitor or battery.
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NiMH battery charger of hair trimmer
Can you please help me to understand the working principle of this circuit. It's simple circuit for charging of NiMH 1.2 V battery and driving of DC motor of hair trimmer I'm confused because the ...
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Universal laptop charger on USB-C computer
I recently bought a new laptop that came with a USB-C charger, leaving me with a few universal chargers from my old laptop that do not have a USB-C tip, but have the power capacity to supply the 20V/...
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Why do phone companies ask to use their own chargers? [closed]
A mobile charger is basically a switch mode power supply. Samsung asks its phone buyers to use only Samsung chargers, but the general noise on the internet is that even a NOKIA charger works fine on ...
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What technical progress enabled high-efficiency charge pumps?
I found a lot of information on the internet, most of which told me that charge pumps are only suitable for low-power scenarios and they are not very efficient.
Charging ICs based on the charge pump ...
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Can I power my MacBook Pro 2023 with MacBook Air 30W adapter? [closed]
Can I power my MacBook Pro 2023 with MacBook Air 30W adapter? Any potential for damage? I believe the answer is no, but seeking some second opinions.
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2 xLM324N lead battery charger fail. Images added
i have a Lead Acid battery charger that was given to me since its not working.
I have no 12volts output neither any led on.
Schematics do not appear after hours of google search
So far ive tested ...
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LiFePO4 battery charger and inverter in parallel
I've got a brand new LiFePO4 battery (200 Ah) with internal BMS, got the Blue Smart IP65 Charger from Victron Energy and an inverter.
The easiest way to connect them is in parallel (off course adding ...
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Laptop connectors and universal chargers (tips M3, M4, etc.)
I am interested in having more information about connectors and identifiers (M3,M4,...M31) used by laptop universal chargers.
Is there any "official" list or convention for laptop ...
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The voltage VBAT on the HP4059 IC
I am using the HP4059 charger to charge a 35 mAh battery. Here is my schematic:
I have placed a 3 kΩ resistor R1 (charging current of 33.3 mA). If there is no load on VBAT, everything works fine, and ...
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TP4056 power cutoff circuit using PFET
I want to understand this and also to make sure this will work.
This is a TP4056 USB-C charging circuit. The circuit is almost the same as the regular one you'll find ordering from China. The only ...
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Can I charge my PA with a Makita 18v battery and an adapter?
I have an 18v 3A power brick that is used to charge a portable PA system with an internal battery (internal battery is 14.8v 2600mA - ie 4x18650 Li batteries). The PA system probably has the ...
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15 W USB ports in car [closed]
My car has two 15 W USB C ports that will fast charge my phone, but they are not powerful enough to super fast 2.0 power my phone (S21+). Is there any kind of device that would take the two 15 W ...
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Amount of watts on a phone charger [closed]
I'm building a phone charger, and I'm curious about the output power. We know that a phone battery charge on 5 V, and let's say the overall resistance of the charging circuit in the phone is about 200 ...
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How wireless charger automatic detect Rx Coil to turn on
I want to know how wireless charger can detect 2nd coil then the switching at 1st coil is on, but when the 2nd coil isn't detected by 1st coil, the switching at 1st coil is turn off. How it happens? ...
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Can’t read code on blown capacitor
I have a blown capacitor with damaged code (maybe 102?45)it’s from a charging circuit board from an
8zed-2000S-12v-UPS inverter/charger/UPS.240v-15amp charger the markings on the board are NTC1. I can’...
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Charge my DIY 18650 battery pack with DW01A BMS board
I am currently in the process of making a 3S 18650 battery pack using a BMS board that I purchased from Amazon. The image of the board can be found below:
Yesterday, I successfully connected all the ...
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Advice for my Battery Management/Charging System
I am working on a battery management or charging system for a 3s2p battery topology. It will be used in a project where AC power from an alternator is rectified to DC power and is used to power ...
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How does this half bridge inverter charger charge the battery?
I just can't understand how this inverter charger actually charges the battery. The charging circuit uses two SCRs on the mains side of the transformer. The same transformer is also used to step up ...
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How do I connect an intermittent load (RC airplane electronics, servos, motor) to solar cells and a battery?
I'm a bit of an electronics noob and haven't been able to find a straight answer to this question despite doing quite a bit of research, so I figured I'd ask it here. I am working on an autonomous RC-...
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IP5301 USB Negotiating?
Currently trying to get this board to simply supply me 5v through the USB terminals on the back.
https://a.co/d/3mZtA3k
I have the USB + and - hooked to a Wemos D1 Mini V4, and when I activate the KEY ...
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Which way should I solder these XLR terminals?
I need to install a female XLR connector on my electric bike to work with a new charger which has an XLR plug. Before soldering the wires, I wanted to check that I'm making the connection in the ...
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Is USB-C unsafe in humid/water conditions? [closed]
We had a case in France of a teenager who died by electrocution while taking a bath when his phone that was being charged fell in the bathtub (as reported by the press).
How is it possible taken into ...
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Can 2s2p battery be checked with 2s bms?
I decided to make a 2s2p rechargeable battery to power the Arduino. I am not sure if this setup can work, and i have no idea what kind of charging module to use.
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12VDC LED blinks when powered by a PD charger using a USB-C decoy module
I am trying to build a low-voltage LED lamp powered by a USB-C PD power adapter instead of a traditional DC power supply with a barrel connector. Several reasons for this:
USB-C cable is detachable ...
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Li-ion maintenance charging
I need to store a small stock of 14500 Li-ion batteries and am looking for an efficient way to maintenance charge them to 40-50% of full capacity. While a timer-based approach is feasible, it will ...
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Battery charger RT9471 is not cutting off voltage on VSYS pin in ship mode
I am using RT9471 battery charger. It enters ship mode when battery voltage reaches 3.0 V through I2C communication. The battery is connected to PCM IC (AP9221SA-CC-HAC-7) and then to battery charger.
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Charging voltage across VM and VSS of AP9221SA-CC-HAC-7 is 0.6V even when USB charger is inserted
I am using AP9221SA-CC-HAC-7 PCM IC with 1-cell Li-ion battery (4.2V). I have battery charger (RT9471) after PCM IC and load connected after battery charger. The PACK+ and PACK- signals go the the ...
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Laptop charger (USB-C) kaputt, repair, substitute or buy new? [closed]
My laptop charging cable has a presumablyl slack joint and doesn't charge anymore. (It previously charged when you maneuvered the cable into a certain direction).
I'm now contemplating these three ...
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How to start building lithium-ion battery charger?
Introduction
Wanted to start with my level in electronics. I am very beginner hobbyist & the last thing related to electronics I did in college was creating an 12V AC to DC Converter that was 15 ...
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How can I buy or build a USB cable that will provide minimum charge current but maintain data conenctivity?
Question: How can I build or buy a USB cable (or hub or adapter or anything) that will limit the charging current to the minimum (0.1A I believe) without obstructing the data lines which would break <...
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How much power do I need to charge 12 V 800 mAh NiMH battery
I have a cordless drill with a 12 V 800 mAh NiMH battery. Somehow I lost its charger. I tried to charge the battery with another 12 V 1 A power supply, but it did not charge. So, how much voltage and ...
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LiPo Battery charging time with TP4056
I recycled some old ASUS battery laptop, with notes it had 15 V and 66 Wh rating. Then I disassembled it. Found 4 LiPo cells connected in series, each may be rated 3.88 V from a small print on each ...
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Transformer in a 2-3A charger
I have opened one of my phone charger to check the transformer used to provide an output of 2-3 A. I am a bit surprised regarding the size of the transformer. It is very small and the wires in the ...
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50 W Charger USB-PD Integration and Simulation
I'm designing a charger for a smartphone. I designed a circuit that will take 20 V 2.5 A at the output by following the USB-PD protocols required for 50 W through an internet-based simulation program ...
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How to increase output power of pre-designed USB-PD fast charger?
The circuit in the link is providing 45 W output. How to increase output power to 50 W? Which component should be changed?
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I just built an 18650 battery. I need to know if I can use this power adapter/charger for this BMS [closed]
I just built my first battery. I need to know whether I can use a 12 V, 1.8 A power supply that I fished out of a box of electronics I have. It was for an Apple router or something.
The battery is a ...
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Dell laptop charger - is the data pin necessary?
In a P-12 dell charger there are 3 wires - blue, white and black. From searching Google I found out that the blue is probably for communication. Now, is it necessary to use the blue wire in order to ...
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Need help validating my lead-acid car battery charger experiment
After experimenting and testing each block separately, I want to give it a try all together, however I have a few doubts. This is a car battery charger I'm experimenting with, for acid/lead non sealed ...
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Replacing power transistor with relay in a battery charger circuit
I found this circuit, which supposedly limits the charging current to 2A max. This is for acid/lead batteries.
Then, I would like to NOT use a power transistor like 2N3055, but instead use a relay as,...
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Why don't we use the 7805 for car phone chargers?
What are the disadvantages of using a 7805 (with a heat sink) to use in a car USB phone charger?
Another option: It gives a 1 A current, so could I maybe wire two of those and give a 2 A output?
In ...
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How to safely use a USB bus powered device in a car
I want to use a USB bus powered USB 2.0 audio interface in my car for DSP.
Specifically a MOTU Microbook II https://motu.com/products/motuaudio/microbook_old
My car doesn't have a USB port near the ...
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Understanding power bank discharge circuit
I am trying to understand the charging and discharging procedure of a lithium ion cell.
Eventually I would like to be able to build my own power bank, I understand that there are existing power bank ...
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Why does this relay oscillate? How can I stop it?
I'm having fun with a simple auto cut off circuit for a battery charger. This is the diagram. I found it on the web:
The problem comes when trying to set the cut off voltage by fiddling with VR1, and ...
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Please help me identify this scratched IC
There are three 18650 lithium-ion batteries connected in series in a device and there is a charger circuit connected to it that has a scratched SOIC8 chip as cornerstone. Following is the circuit ...
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Is it safe to use this weird lifepo4 charger [closed]
I have an 8S LiFePO4 battery pack which I tried to charge using my suspicious lithium battery charger. The charger applied a voltage slightly higher than the battery voltage at any moment to charge it ...
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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 ...
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What would be the suggested rectifier for a simple lead/acid automotive battery charger?
In the past, I have made quite a few (simple) car battery chargers; basically with old TV set transformers and a full wave rectifier bridge they worked just fine.
Now I want experiment with a slightly ...
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Bidirectional USB and battery to charger in a microcontroller circuit
This is the circuit that I have designed to have connection to both USB and battery as well as an external 12V charger (VCC line).
My requirements are:
The USB should be OTG. It should be able to ...
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Constant Current Charger
I have done a simple charger by using a opamp UA741 and a current limiter. The current limit method is using 2 transistors and a resistor to limit at 3A. However, this current limit was not limit the ...
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What is the max charger amp rating recommend for charging 4 LiPo 200amp max charge rate batteries in parallel
What is the max charger amp rating recommend for charging (4) LiPo 12v 200amp max charge rate batteries in parallel. Battery’s are 12v 200ah BMS deep cells with max 200 amp charge rate each. I’m ...
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