All Questions
43
questions
0
votes
3
answers
236
views
DC Buck Converter for more than 3A
I want to use an Arduino Nano to controll an LED strip using an WS2812B IC. The strip takes 5V at 3.6A. I want to power the arduino and the strip using two 18650 Li-ion batteries (LGDBHE41865), which ...
- 101
1
vote
1
answer
2k
views
Calculating Amperage After Boost In DC-DC Circuit
To keep this simple, I am trying to figure out what happens to the amperage when having the voltage boosted in a DC-DC circuit.
For an example here, Lets assume that the power source is a 26650 ...
- 11
3
votes
2
answers
2k
views
How to convert 48V to 5V in this system?
I have built a prototype for monitoring the battery voltage of my off-grid PV system. The prototype is as shown in the clumsy schematic drawing below, and it uses 24 V battery. I use an OKI-78SR-5 to ...
- 65
2
votes
4
answers
10k
views
Battery Charger using a buck converter
I'm designing a Lead Acid battery charger with 3 stages. For the 2nd stage (constant voltage stage) as it is written in literature: the voltage applied on the battery must be dependent on temperature. ...
- 63
2
votes
1
answer
599
views
Extending battery life: Calculating advantage of adding more batteries
I have a small 3 volt device with an MCU and 8 LEDs that I'm currently powering by two AAA batteries connected in series. With fresh batteries, I start out with about 3.2-3.3 volts and get very good ...
- 1,835
0
votes
1
answer
1k
views
Current output of a solar panel when connected to battery and load
I am trying to build a microgrid (final year project) where a 100-250 W 48V solar array will charge a 24V battery bank and a couple of 24V loads (40W lights, 60W fan).
Batteries used (7 of this in ...
- 11
0
votes
3
answers
142
views
Getting closer to figuring out my battery requirements
I have been doing research for at least a week and am still a bit confused, but think I am getting to the point where I am close.
I need to power 5V 3-5A. Some days this power source will hook up to ...
- 165
11
votes
4
answers
3k
views
Boost or buck regulator for battery life?
I want to make a wireless sensor node that will run at about 2.5v. I am trying to decide between running 3 alkaline batteries in series with a buck converter or in parallel with a boost converter. I ...
- 1,202
2
votes
2
answers
530
views
Powering DSLR with buck/boost convertor
I've been experimenting a bit with time-lapse photography lately. Still basic stuff. Right now I have to change batteries every so often which is a pain because it's hard not to move the camera when ...
- 123
2
votes
4
answers
27k
views
Charging 2 Li-Ion Batteries via a single charger
I'm currently building a portable USB charger. It uses 2 Li-ion batteries in series connected to a USB port via a 5V regulated buck converter. While a single Li-ion battery would suffice for most ...
- 567
1
vote
2
answers
8k
views
How to adjust output current on a buck converter?
I 'm planing to use a zinc–carbon 9 V battery to power up:
the circuit that battery belongs to
BeagleBoard-xM
I 'm thinking of using a breadboard, in order to power up both circuits. Beagleboard-xM'...
- 659
2
votes
2
answers
2k
views
Building a low-power solar/wind buck-boost converter
Using a 18V(max) solar panel, I'd like to charge a 12V lead-acid battery. I'm working from the basic inverting buck-boost circuit. My main question is, being a relatively low-power circuit, can I ...
- 127
3
votes
5
answers
8k
views
How to power a GSM Modem from a Li-Po battery?
I want to integrate an AirPrime SL6087 GSM modem into a design, this is my first try at working with a GSM module. The datasheet states that the modem draws 2A for 1mS every 4mS (max) at 3.6V, the ...
- 2,525