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fraxinus
  • Member for 5 years, 9 months
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32 votes

Where is the LED in this light bulb?

30 votes
Accepted

What are these extra pins? (stereo jack connector)

30 votes

How to make electronic systems which work below −40°C (−40°F)?

20 votes

Computer power supplies usually have higher efficiency on 230V than on 115V. Why?

19 votes
Accepted

Can lead-acid batteries be stored by removing the liquid from them?

18 votes

Why does this solar panel powered dc motor not spin?

17 votes

Easy and cheap way to sink more than 5 A from a power supply

16 votes

Do cell-phone base station antennas emit the same power as cell phones?

16 votes

What are the little bits of metal that come out of light bulb filaments and why do they stick to only one terminal?

16 votes

Could an uninterruptible power supply for energy intensive appliances balance the power draw and help my breaker stop tripping?

15 votes

Why do power grids tend to operate at low frequencies like 60 Hz and 50 Hz?

14 votes

How come modern electronic devices support charging with various voltages through USB-C?

13 votes

Does a battery's ability to supply high current mainly depend on its internal resistance?

12 votes

Should I use AC or DC between buildings?

11 votes

Why is this 3-way speaker wired this way?

11 votes
Accepted

Negative DC wire gauge

11 votes

What's the purpose of the band-pass filter in an RF transmitter?

10 votes
Accepted

Why does the resistance of a space heater decrease as it gets hot?

10 votes

What does this transistor circuit do?

9 votes

Do stateful 74LS series chips start in a defined state?

8 votes

What does the capacitance labels 1NF5 and 1UF2 mean on my SMD capacitor kit?

8 votes
Accepted

What's the reason for large VA vs W difference in an inverter?

8 votes

What is the maximum voltage of an AAA battery?

8 votes

Why do capacitors have less energy density than batteries?

7 votes

What are the limitations of USB in aerospace (especially microsatellites)?

7 votes

Why does converter's efficiency degrade with higher V_IN?

7 votes

Does coiling and straightening a wire change its resistance?

7 votes
Accepted

Audio amplifier: output power higher than input?

7 votes

My "nail and wire" electromagnet isn’t working

7 votes

Why did USB win out over parallel interfaces?

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