User EM Fields

71 votes

How does a Crystal work?

answered Jul 3, 2014 at 15:22

25 votes

Accepted

Why are reed switches made in glass tubes?

answered Dec 16, 2015 at 19:49

17 votes

Preferences: Male or Female connector on board

answered Sep 25, 2014 at 9:11

17 votes

Accepted

How can I detect fuse failure?

answered Sep 17, 2015 at 13:20

16 votes

Accepted

Storing batteries in a refrigerator

answered Jul 16, 2014 at 18:28

14 votes

Accepted

In a 74HC14 Schmitt trigger IC, unused inputs/outpus

answered Jun 5, 2015 at 9:34

9 votes

I am a quadriplegic. Would it be possible to power my ventilator humidifier with a battery?

answered Mar 17, 2015 at 21:06

9 votes

Connecting a potentiometer

answered Jul 11, 2014 at 8:12

9 votes

The safety of the capacitor

answered Oct 29, 2014 at 9:04

8 votes

How to throttle power consumption of a heating coil?

answered Sep 13, 2014 at 8:59

8 votes

Accepted

How to add ground to DC circuit?

answered Mar 31, 2015 at 21:28

8 votes

Accepted

Why are watts used as a measurement for some appliances?

answered Feb 13, 2015 at 19:34

8 votes

Accepted

What is the total resistance of a LED array?

answered Jun 23, 2015 at 13:21

8 votes

Detecting a wire break

answered Jun 5, 2016 at 14:48

8 votes

Accepted

How do I find C & L from XC and XL?

answered Oct 21, 2016 at 21:43

7 votes

Accepted

What should my resistor wattage be to run a LED on 240VAC?

answered Jul 21, 2016 at 1:59

7 votes

How to solder wires to a hobby motor

answered May 30, 2015 at 9:50

7 votes

How to determine the power supply needed for a PCB

answered Feb 2, 2015 at 16:19

7 votes

Volts and frequency worldwide

answered Sep 11, 2014 at 7:53

7 votes

Schematics for a simple radio transmitter that can be built only with passive components?

answered Aug 4, 2014 at 18:12

7 votes

Accepted

Measuring small inductances

answered May 29, 2014 at 12:58

6 votes

Accepted

Measuring Current Consumption of USB Devices

answered Jun 9, 2014 at 9:42

6 votes

How can I add a power-off delay to this circuit

answered Jun 30, 2014 at 12:52

6 votes

Accepted

Can a low current (low power) solar panel charge a battery?

answered Jun 23, 2014 at 13:09

6 votes

Full wave rectifier capacitance calculation

answered Oct 14, 2014 at 11:25

6 votes

Accepted

Chipquick SMD291 No-clean Paste Flux - Conductive?

answered Mar 12, 2015 at 16:39

6 votes

1.5V-rated MOSFET doesn't react to a gate input of 1.8V

answered Jun 26, 2015 at 23:19

6 votes

Does electrical current flow from positive to negative or negative to positive?

answered Jul 24, 2015 at 20:44

6 votes

How to Use Diode Oring to Switch between Two Power Sources?

answered Oct 10, 2015 at 12:21

6 votes

Building a dual-rail, regulated DC power supply: 1 diode bridge & center-tapped secondaries, or 2 diode bridges and separate secondaries?

answered Nov 1, 2016 at 9:28

Stack Exchange Network

891 Answers

How does a Crystal work?

Why are reed switches made in glass tubes?

Preferences: Male or Female connector on board

How can I detect fuse failure?

Storing batteries in a refrigerator

In a 74HC14 Schmitt trigger IC, unused inputs/outpus

I am a quadriplegic. Would it be possible to power my ventilator humidifier with a battery?

Connecting a potentiometer

The safety of the capacitor

How to throttle power consumption of a heating coil?

How to add ground to DC circuit?

Why are watts used as a measurement for some appliances?

What is the total resistance of a LED array?

Detecting a wire break

How do I find C & L from XC and XL?

What should my resistor wattage be to run a LED on 240VAC?

How to solder wires to a hobby motor

How to determine the power supply needed for a PCB

Volts and frequency worldwide

Schematics for a simple radio transmitter that can be built only with passive components?

Measuring small inductances

Measuring Current Consumption of USB Devices

How can I add a power-off delay to this circuit

Can a low current (low power) solar panel charge a battery?

Full wave rectifier capacitance calculation

Chipquick SMD291 No-clean Paste Flux - Conductive?

1.5V-rated MOSFET doesn't react to a gate input of 1.8V

Does electrical current flow from positive to negative or negative to positive?

How to Use Diode Oring to Switch between Two Power Sources?

Building a dual-rail, regulated DC power supply: 1 diode bridge & center-tapped secondaries, or 2 diode bridges and separate secondaries?