5
votes
Can you use a 12V lead acid battery to switch a contactor?
That resistance you quote is for the auxiliary contacts, not the coil. The coil takes a peak current of 3.8A (ie a 4 ohm load) and features a built in economizer which limits the current draw after ...
- 487
4
votes
How to get multiple voltages from a single battery?
The easiest way for a hobbyist to do this is to purchase one or more buck regulator modules that use a switchmode regulator chip to reduce the voltage without much loss. Then use the 12V for the motor ...
- 327k
2
votes
How to get multiple voltages from a single battery?
You can use relatively cheap components. So-called voltage regulators are quite ubiquitous.
They come in two main types. Assuming that your microcontroller does not draw much current you can use a ...
- 6,406
1
vote
How to get multiple voltages from a single battery?
Getting a voltage lower than the battery is simpler than a voltage greater than the battery. A voltage divider will give you a lower voltage, but the voltage will be sensitive to the load. A voltage ...
- 231
1
vote
Should I use a DC-DC converter or an LDO?
It looks like LiPo batteries stay above 3.3V in normal charge levels, and drop to 3.0V when they're below ~80% capacity.
Image source: https://learn.adafruit.com/li-ion-and-lipoly-batteries/voltages
...
- 11
1
vote
Charge a 12V 90Ah led acid battery using 12V 20A SMPS
Your question:
If I use the above SMPS will that SMPS reduce the current accordingly or give the total 20A current?
Short Answer: Most probably it will not provide an adequate current, triggering ...
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1
vote
Charge a 12V 90Ah led acid battery using 12V 20A SMPS
No, because a switch mode power supply is not a battery charger.
Power supply can also be damaged when connected to another voltage source, the battery.
You need a battery charger to charge batteries.
...
- 87.1k
1
vote
Circuit to charge three lead acid batteries in parallel and discharge them in series
I tried this, but finally I decided it's not worth the effort. This schematic was my draft for the test:
There may be errors in the schematic, don't trust it! Danger to come!
To your question: I used ...
- 236
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