All Questions
15
questions
0
votes
3
answers
88
views
Can I charge 604050 LiPo battery using USB charger and single resistor?
The battery I got off Aliexpress has a protection chip:
I'm wondering - Will the chip protect the battery against overcharging if I use a standard 5V USB charger and a single resistor in series?
...
- 113
0
votes
0
answers
51
views
Supplementing USB power with batteries
I am designing a custom USB hub for a project that will be primarily connected to a Surface Pro or laptop. One of the peripherals that I am using is a camera that consumes quite a bit of power from ...
- 11
0
votes
0
answers
73
views
Charge device and power other devices over the same USB port
I'm creating a raspberry pi based mobile device. It has a LiPo-battery and a lipo charger, which will power the raspberry pi. The device should have one usb port, over which the device can be charged ...
0
votes
0
answers
38
views
Help me with name of this type of cable to charge my drone.I want usb to female end connector
I have old remote control helicopter in my toys and I want to charge it via USB.But to purchase it online i am not aware of it's name.Help me with name for connector as shown below. Usb to female end ...
- 1
9
votes
1
answer
2k
views
Is this MOSFET upside down?
I'm looking at existing circuits and trying to understand them so I can design my own. Also to improve my electronics knowledge, for some reason MOSFETs have never quite sunk in for me.
I came across ...
- 166
3
votes
2
answers
358
views
Can a bad USB-C PD charger puff up a battery?
I have a notebook which supports USB-C PD charging. I've been using 3 chargers that I have. The battery that came with the notebook (original) puffed up after about 1 year of usage, but I didn't seem ...
- 163
0
votes
0
answers
471
views
Feedback on USB-C Power + LiPo Battery + Nema 17 Stepper Motor PCB Design
TL;DR: I need a technical check on my circuit design that utilizes LiPo battery & USB-C charging.
Hi everyone,
I've been working on a project to build my own camera slider. It's powered by ...
- 69
0
votes
0
answers
121
views
Charging 18650 Lipos with PCB and micro USB breakout board
I have a circuit with 2 18650 Lipos, which are connected to a 2s PCB Protection Board which has a p+ and p- connector for out- and input. My question is whether I can charge the two batteries by ...
- 91
3
votes
3
answers
8k
views
Can I swap a USB power sources for a 3-AAA battery source?
I'm putting some battery-powered lights into a boat, and I have the following question:
I bought a bunch of cheapo LED lights, as pictured:
They run on 3 AAA batteries. They work fine using 1.2V ...
- 141
-2
votes
2
answers
4k
views
Making a LiPo battery charger from USB +5V supply
My friend's drone battery charger is dead. I want a charger for battery, only problem is that I don't know how to do it. I tried to make one using voltage divider, but I don't know to to do all the ...
- 3
6
votes
3
answers
11k
views
How to monitor voltage and charge status in USB battery pack
What's the easiest, least intrusive way to monitor voltage, charging status, and remaining charge of a USB battery pack?
Battery packs and charging circuits for mobile projects can be complicated and ...
- 4,509
1
vote
1
answer
397
views
How to set up a LiPo battery to be able to charge and discharge from the same circuit
I am new to using rechargeable batteries in electronics projects. To give some background on the context of the project, I'm trying to build a solar charger/power pack for a cell phone. My problem is ...
- 111
0
votes
1
answer
754
views
LM2577 based boost converter board gives random shut-downs with a 3.7v Li-Po
I recently bought a LM2577 based boost converter board from dfrobots.com such as the one below.
I'm trying to use it to generate a stable 5v from a 3.7v 2100mAh Li-Po battery. The Li-Po voltage was ...
4
votes
1
answer
6k
views
USB to 3-cell Lipo charger?
I have a data-logger project that needs to run from a 3-cell Lithium Polymer battery. It has 5v and 3.3v regulators to provide regulated power to the system.
I want to build the battery into the ...
- 163
2
votes
1
answer
2k
views
Li-Po USB Charger with PIC, voltage is not falling to 0V
I am designing a single cell Li-Po charger with a PIC. I have this:
I drive the transistors from a 12F PIC microcontroller. As you can see in the square wave on the top of the oscilloscope the signal ...
- 1,864