All Questions
43
questions
0
votes
1
answer
1k
views
Using an old eBike battery to power an electric trolling motor
I have a couple of old 36v eBike batteries lying around. I also have a Minn Kota Endura C2 30 electric trolling motor for my small boat which needs a battery. My previous experience with a large lead ...
1
vote
1
answer
57
views
What is the best way to tap 12v from a 6x6v battery array for intermittent loads?
Greetings beloved comrades,
I recently acquired a 36v golf cart that has 6 6v batteries in series. The existing 12v accessories, mainly lights, are powered by a separate series connection to 2 of the ...
- 115
-3
votes
2
answers
82
views
Buck converter or regulator [duplicate]
I have a battery supply consisting of 3 AA batteries of each 1.5V.
I need an operating voltage of 3.3V.
Which choice of buck converter or regulator would be better?
My application requires 100mA of ...
- 49
0
votes
1
answer
185
views
Charging a Li-ion battery with a Buck Convertor & ATmega8 [closed]
I'm trying to charge a 7.4 V Li-Ion battery following the CC/CV protocol and have a few questions.
I want to use an SMPS from my old laptop that can provide 20 V/3.25 A and feed that to a buck ...
1
vote
3
answers
292
views
Battery emulator based on an array of buck converters for BMS testing
Problem: How to quickly and cheaply test if a given BMS (Brand: Daly / Tiny BMS / etc) or battery-powered system behaves as intended for various cell voltage combinations without waiting for actual ...
0
votes
3
answers
1k
views
Buck converter source current draw
I'm doing some calculations for a system that is going to use a few buck converters. I need to make sure that the battery will be able to feed enough current but I'm not 100% certain how power on the ...
- 930
1
vote
2
answers
875
views
Using LM2596 step-down with Li-po
I'm doing a project with an ESP32 (3.3 V), a DHT11(3-5 V), a soil sensor (3.3-5 V, the cheapest Chinese), NRF24L01 (2.6-3.6 V).
I'm using LiFePO4 right now (3.32 V), but when the battery voltage drops ...
0
votes
3
answers
2k
views
Can I use a current control buck converter to charge a battery?
As shown below, could I use a microcontroller to charge the Li-ion battery? I'm unsure if I'll run into issues with the voltages on the ADC. I've done this exact setup before with a generic load, I'm ...
0
votes
0
answers
180
views
Current and voltage increasing with duty cycle from buck- converter
I am designing a 2s Li-ion battery charger using a buck converter from a 10W (18V, 0.55A) solar panel. So I understand that the duty cycle controls the ratio of the input power vs output power and ...
- 33
1
vote
1
answer
126
views
Power supply question in regards to powering 400 LEDs
I have WS2812B LED strips, that has 144 LEDs per meter. The ratings are:
43W/M .3W/LED
.06A per LED
Input Voltage of 5V DC
The recommended power supply stated by the website is 5V DC and 10A for 1 ...
- 13
2
votes
3
answers
3k
views
Why is my buck converter emitting smoke and fire?
I am powering my router from a 24 V battery, but the power requirement of router is 12 V/1 A, so I am using an LM2596 buck converter.
The specification for this buck converter is as follows:
Input ...
- 123
0
votes
1
answer
661
views
Inductor and Capacitor for Bidirectional DC-DC Converter with Battery
I have to design a bidirectional converter to regulate a DC bus at 250 V with a battery bank at 144 V. My question is how to do it optimally, because I do not know the maximum ripple allowed in the ...
- 157
1
vote
1
answer
107
views
Is there any risk in leaving a Li-ion connected to a solar panel with only step-down converter?
I have a 18V solar panel which is connected to a step-down buck converter, which drops the voltage from 18V to 3.5V. When clouds block the sun, the voltage drops to less than 3.1V. I have added a ...
- 573
2
votes
0
answers
371
views
Any specific precautions should be taken when using 2x AA LiSOCL2 batteries in parallel?
I am working on the wireless sensor design and one of the sensor is such that it needs to be kept ON through out the operation and it takes supply of 3V and current of about 100uA, which I think is ok ...
- 358
1
vote
1
answer
616
views
Synchronous buck converter in parallel with linear regulator
I'm looking at designing a circuit to provide power to a USB charging port (500 mA charge rate max) in a 12V battery-powered application.
I'd like the buck converter to be "off" when there isn't any ...
- 1,420