New answers tagged batteries
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Why doesn't connecting a positive terminal of a battery to ground cause current?
I don't think these answers are true!
I'm not sure but as I've read, the reactions within a chemical cell (also known as battery) won't start until there is a way for electron flow from one of the ...
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Powering 24 V and 12 V device simultaneously from two 12 V batteries
You can use the Buck converter to drive your loads. And install a separate 12v monitor on each battery directly to the terminals paying careful attention to not wire the battery terminals in parallel ...
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Voltage fluctuation observed in two parallel LiSOCl2 batteries
Li-SOCl2 cells have quite high internal resistance and will never catch fire. Even shorting them out. They are extremely safe. I am using 2 Li-SOCl2 in parallel and having the same issue, where one ...
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Arduino Nano Powering from Battery and USB Communication
For your specific question, if you power the device via 9V battery, and connect this to your (powered-on) laptop, it should work fine and not cause any problems to your laptop. The diode indeed ...
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Power harvesting from NFC device(smartphone)
What you are describing is exactly how contactless smart cards (“chip and pin” payment cards for instance) work: the reader provides enough power for the (tiny) controller in the card to power up, ...
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Is this a good way to make 2S 18650 battery cell while parallel charging?
strong textThis Circuit is FAKE AND NOT WORK!! YOU PRODUCE WITH THIS CONFIGURATION AN EXPLOSION FOR CHARGER AND CELLS!! !! REMOVE THIS CIRCUITS AND ALL INFORMATIONS FOR THIS DIAGRAMS, SCHEMATICS AND ...
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TP4056 module series output
This configuration damage all charger ICs. The TP4056 Linear Li-lon Battery Charger can not cascade. This is a fatal error schematic diagram.
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Circuit Diagram for powering 32 motors
This is normal to have a start current in DC motors that is >=10x rated current and 12x in highly efficient DC motors. If you compute more than this I'd be suspicious.
The answer is to use current-...
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Power switching module works on paper but not in real life
Examine the scenario where both NO and NC have a voltage source connected, Q2 is switched fully on, but Q1 is off. Here's a simplified representation, with everything unimportant removed:
simulate ...
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Power switching module works on paper but not in real life
Your Falstad simulation has errors in drawing. Wrong values for FET Beta and have 8V drop at 1A, with 12V/2 ohms=6 A or 3A each is expected.
Ground is missing so node voltages have no 0V reference. ...
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How to simulate a discharging battery in SPICE for this scenario?
This schematic take account of "transient" change.
Some components may be changed.
It present the behavior of ULTRAFIRE 3000 mAh battery (~ verified).
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How to simulate a discharging battery in SPICE for this scenario?
You can use a large capacitor to roughly emulate a battery.
For example, for a 5Ah battery with a 1V drop in voltage over that discharge value, you could use a capacitor with (5*3600)/1V Farads or 18,...
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488 nm 30 mW 3.7 V laser: Is the driver or the diode fried at 9 V?
Those < $1 laser diode pointer things typically don't have a 'driver' with feedback or 'specifications' like a fancy Thorlabs laser diode.
The laser diode chip isn't even packaged, the raw die is ...
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Battery discharge over time
Unfortunately, estimating remaining charge left in a battery or cell is not as simple as monitoring the fuel level in a liquid fuel tank. A battery's voltage remains close to nominal voltage during ...
- 180k
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Accepted
Unexpected Li-Ion ESR
It looks like something indeed went wrong with the Keithley 2281S-20-6, though I'm not sure what. I cleared the data buffers on the instrument and retested with the same battery and got much better ...
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Connecting battery chargers in parallel with load?
Virtually all loads meant to be powered from a "12V" battery count on its actual voltage range which can be anywhere from as low as 11V or less, and up to almost 15V.
Practically all of the ...
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Accepted
Connecting battery chargers in parallel with load?
If a load is designed to be connected to a nominally 12V battery, then it'll work just fine at the higher voltage of a battery under charge.
If the load was designed by someone who heard "12V&...
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