User ria

27 votes

3 answers

64k views

What does it mean when multimeter accuracy is marked as: ±0,03%+10Digit?

multimeter accuracy

asked Dec 3, 2011 at 17:00

14 votes

4 answers

60k views

if a standard three-phase 400V AC connection is rectified what DC voltage comes out of it?

asked Apr 2, 2011 at 18:08

14 votes

4 answers

63k views

how can I try to revive this AGM deep-cycle battery which started to perform dramatically below specifications?

batteries battery-charging

asked Mar 23, 2011 at 8:01

13 votes

5 answers

67k views

how to measure the internal resistance of a voltmeter?

multimeter voltage-measurement

asked Apr 14, 2011 at 13:53

13 votes

6 answers

36k views

which kinds of electrical equipment need a pure sine wave inverter to work correctly?

inverter efficiency

asked Apr 16, 2011 at 15:27

11 votes

9 answers

7k views

how can I make a large transformer less loud?

transformer ac

asked Apr 12, 2011 at 23:05

10 votes

2 answers

7k views

will a circuit breaker designed for 230VAC work for 12VDC?

current safety protection

asked Mar 24, 2011 at 11:42

8 votes

6 answers

21k views

what size of copper wire can act as a 150A fuse?

current wire wiring fuses

asked Mar 29, 2011 at 18:16

7 votes

6 answers

2k views

how do energy consumption (Ah, kWh) meters work?

measurement energy current-measurement

asked Nov 5, 2010 at 11:02

7 votes

3 answers

2k views

is it OK to stack several DC-DC converters with their inputs connected in series to support a larger input voltage?

power-supply dc-dc-converter

asked Apr 5, 2011 at 13:38

6 votes

4 answers

11k views

how to build a low-voltage disconnect switch for DC 12.4V 70A?

power-supply voltage switches low-battery undervoltage

asked Nov 2, 2010 at 19:25

5 votes

2 answers

2k views

what does "70A moy/arit 90A eff" on a high-current automotive lead-acid battery charger mean?

batteries battery-charging automotive

asked Mar 24, 2011 at 13:28

5 votes

4 answers

2k views

is it possible to install some device which will measure in real time the torque my diesel engine is providing at the moment?

power measurement automotive

asked Apr 5, 2011 at 18:23

5 votes

2 answers

3k views

is it possible to repair a DMM which was burned by putting the leads into 230V on a frequency-measuring setting?

multimeter repair

asked Apr 8, 2011 at 8:20

5 votes

3 answers

20k views

is there some sort of paste, grease, spray or similar thing that helps make more contact surface for high-current battery?

high-current conductive

asked Aug 28, 2012 at 13:55

4 votes

5 answers

10k views

how to build a high-power (4kW) switched-mode DC-DC converter?

power-supply power dc dc-dc-converter conversion

asked Mar 28, 2011 at 21:54

4 votes

1 answer

2k views

how to modify a taper charger of lead-acid batteries to be a constant current charger?

batteries battery-charging

asked Mar 23, 2011 at 18:49

1 vote

2 answers

345 views

Is it a good idea to make a second DC installation in a car with its negative separate from the car body?

wiring automotive negative

asked Mar 30, 2011 at 18:16

0 votes

2 answers

123 views

What is the difference between an 230V/120V AC automatic voltage regulator and a step up / step down voltage transformer / converter?

voltage voltage-regulator mains converter

asked Jun 2, 2020 at 14:49

0 votes

3 answers

7k views

How to make two isolated power sources from one source?

power-supply battery-charging automotive charger isolation

asked Dec 3, 2011 at 9:07

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20 Questions

What does it mean when multimeter accuracy is marked as: ±0,03%+10Digit?

if a standard three-phase 400V AC connection is rectified what DC voltage comes out of it?

how can I try to revive this AGM deep-cycle battery which started to perform dramatically below specifications?

how to measure the internal resistance of a voltmeter?

which kinds of electrical equipment need a pure sine wave inverter to work correctly?

how can I make a large transformer less loud?

will a circuit breaker designed for 230VAC work for 12VDC?

what size of copper wire can act as a 150A fuse?

how do energy consumption (Ah, kWh) meters work?

is it OK to stack several DC-DC converters with their inputs connected in series to support a larger input voltage?

how to build a low-voltage disconnect switch for DC 12.4V 70A?

what does "70A moy/arit 90A eff" on a high-current automotive lead-acid battery charger mean?

is it possible to install some device which will measure in real time the torque my diesel engine is providing at the moment?

is it possible to repair a DMM which was burned by putting the leads into 230V on a frequency-measuring setting?

is there some sort of paste, grease, spray or similar thing that helps make more contact surface for high-current battery?

how to build a high-power (4kW) switched-mode DC-DC converter?

how to modify a taper charger of lead-acid batteries to be a constant current charger?

Is it a good idea to make a second DC installation in a car with its negative separate from the car body?

What is the difference between an 230V/120V AC automatic voltage regulator and a step up / step down voltage transformer / converter?

How to make two isolated power sources from one source?