User Dave Tweed

433 votes

Accepted

What is it that strips vocals from audio when a 1/8" audio jack is partially unplugged?

audio stereo

answered Oct 2, 2012 at 19:54

85 votes

Accepted

Why did LEDs take so long to appear as light bulbs?

answered Feb 27, 2016 at 19:54

73 votes

Why are NAND gates used to make AND gates in computers?

transistors logic-gates computer-architecture

answered Sep 7, 2018 at 21:29

72 votes

Do dead weight 'components' exist?

pcb pcb-fabrication pcb-assembly

answered Oct 29, 2019 at 14:47

68 votes

Accepted

Why do CRTs have 3 electron guns?

crt

answered Jan 15, 2018 at 2:53

65 votes

Compute the minimum number of 120Ω resistors to get 80Ω of resistance?

resistors

answered Nov 21, 2015 at 23:37

61 votes

Accepted

Why are FPGAs so expensive?

fpga

answered Nov 7, 2018 at 11:55

56 votes

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"Remove After Washing" on Piezo Buzzer

components piezo-buzzer

answered Feb 2, 2014 at 19:21

56 votes

Accepted

Why does an LED have to be a diode?

led diodes light

answered Oct 12, 2018 at 23:32

55 votes

How did 455 kHz end up being a commonly used IF (intermediate frequency)?

frequency radio history

answered Jan 28 at 4:20

54 votes

Accepted

Am I insane to question that only with a closed path can electrons move?

high-frequency circuit-theory

answered Mar 26, 2017 at 17:57

52 votes

Accepted

Can a radio transmitter somehow detect the number of receivers in its area?

rf signal radio transmitter receiver

answered Aug 27, 2015 at 15:56

51 votes

Accepted

What's special about 14.31818 MHz?

frequency oscillator crystal

answered Jul 31, 2016 at 14:07

51 votes

Accepted

What's the point in a preamp?

amplifier preamp

answered Apr 12, 2019 at 20:13

50 votes

Why is the time constant 63.2% and not 50% or 70%?

circuit-analysis circuit-design math time-constant

answered Sep 18, 2018 at 14:52

48 votes

Accepted

Can a premium HDMI cable outperform a standard cable?

cables digital-communications hdmi

answered Oct 8, 2018 at 14:54

47 votes

How do I power/wire something that is rotating constantly WITHOUT extra batteries?

dc design wiring

answered Jul 18, 2017 at 21:25

46 votes

Who receives the value returned by main()?

microcontroller avr c

answered Jan 22, 2013 at 16:50

46 votes

Accepted

Why is it desirable in an amplifier to have high input impedance and low output impedance?

amplifier

answered May 8, 2013 at 17:24

43 votes

Why does F + F' = 1?

boolean-algebra

answered Sep 9, 2019 at 11:05

42 votes

Accepted

Why must some HDMI repeaters know the cable length?

transmission-line hdmi

answered Nov 27, 2017 at 16:48

42 votes

Accepted

Why put a step-down transformer after a vacuum tube in an a valve amplifier?

amplifier vacuum-tube

answered Sep 17, 2018 at 15:42

40 votes

Accepted

VHDL interview question - detecting if a number can be divided by 5 without remainder

vhdl state-machines

answered Dec 15, 2017 at 20:19

40 votes

How did old WW2-era radars accurately measure time delay and integrate this into an oscilloscope?

oscilloscope history radar

answered Oct 1, 2017 at 20:28

40 votes

Accepted

Why would a Intel 8080 chip be destroyed if +12 V is connected before −5 V?

power-supply integrated-circuit semiconductors nmos 8080

answered Sep 2, 2019 at 1:49

40 votes

Accepted

What's the meaning of Electrical Inches?

pcb pcb-design terminology

answered Oct 10, 2019 at 19:37

38 votes

Accepted

Does anyone remember this article about the Euclidean Algorithm?

resistors

answered May 12, 2013 at 22:50

38 votes

How does a 40 Gbit/s Ethernet interface process packets in silicon?

digital-logic ethernet optoelectronics

answered Dec 5, 2016 at 5:19

38 votes

Why do we use polarized capacitors?

capacitor circuit-design polarity

answered Apr 7, 2019 at 22:01

37 votes

Accepted

Embedded Programming for Beginners: Arduino or Raspberry Pi?

arduino embedded raspberry-pi

answered Dec 9, 2012 at 14:49

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3,915 Answers

What is it that strips vocals from audio when a 1/8" audio jack is partially unplugged?

Why did LEDs take so long to appear as light bulbs?

Why are NAND gates used to make AND gates in computers?

Do dead weight 'components' exist?

Why do CRTs have 3 electron guns?

Compute the minimum number of 120Ω resistors to get 80Ω of resistance?

Why are FPGAs so expensive?

"Remove After Washing" on Piezo Buzzer

Why does an LED have to be a diode?

How did 455 kHz end up being a commonly used IF (intermediate frequency)?

Am I insane to question that only with a closed path can electrons move?

Can a radio transmitter somehow detect the number of receivers in its area?

What's special about 14.31818 MHz?

What's the point in a preamp?

Why is the time constant 63.2% and not 50% or 70%?

Can a premium HDMI cable outperform a standard cable?

How do I power/wire something that is rotating constantly WITHOUT extra batteries?

Who receives the value returned by main()?

Why is it desirable in an amplifier to have high input impedance and low output impedance?

Why does F + F' = 1?

Why must some HDMI repeaters know the cable length?

Why put a step-down transformer after a vacuum tube in an a valve amplifier?

VHDL interview question - detecting if a number can be divided by 5 without remainder

How did old WW2-era radars accurately measure time delay and integrate this into an oscilloscope?

Why would a Intel 8080 chip be destroyed if +12 V is connected before −5 V?

What's the meaning of Electrical Inches?

Does anyone remember this article about the Euclidean Algorithm?

How does a 40 Gbit/s Ethernet interface process packets in silicon?

Why do we use polarized capacitors?

Embedded Programming for Beginners: Arduino or Raspberry Pi?