User hacktastical

55 votes

Why is electricity consumption billed in watts and not amperes?

answered Apr 5, 2020 at 17:57

44 votes

Accepted

Is there a reason why we don’t supply power to a 2.5 mm or 3.5 mm jack?

power connector

answered Aug 29, 2020 at 4:03

41 votes

Accepted

What is the lowest level of CPU programming above transistors?

digital-logic circuit-design cpu

answered Jul 13, 2021 at 16:57

41 votes

Accepted

What is the purpose of this device?

identification video device encryption scart

answered May 11, 2020 at 20:42

38 votes

Scam? Does having this capacitor wired as shown provide any surge protection?

power-supply power capacitor protection mov

answered Jan 25 at 16:21

35 votes

Why is this meter giving different readings depending on its orientation?

analog measurement vacuum-tube meter galvanometer

answered Jun 17, 2021 at 1:47

32 votes

Accepted

Why are off grid solar setups only 12, 24, 48 VDC?

batteries solar-energy solar-charge-controller

answered Jul 24, 2019 at 21:26

31 votes

Do I still need a resistor in this LED series design?

led resistors

answered Nov 4, 2020 at 17:54

29 votes

Accepted

What is the difference between CPU transistors and generic ones?

mosfet power-electronics cpu semiconductors

answered Feb 23, 2020 at 15:53

27 votes

Accepted

Why isn't the current split between the transistor and the LED in this NOT transistor circuit?

voltage transistors circuit-analysis current

answered Feb 26, 2020 at 21:19

27 votes

Achieving bit-perfect rendering of audio CDs

audio

answered Jan 5 at 0:49

27 votes

How do rechargeable 1.5 V batteries work?

batteries battery-charging lithium-ion

answered Jan 12 at 2:30

25 votes

Accepted

Why do logic gates need multiple MOSFETs?

mosfet logic-gates not-gate

answered May 7 at 16:49

25 votes

Accepted

Professor said no current flows to ground

current ground grounding

answered Jan 28, 2021 at 23:43

23 votes

Accepted

ATmega328P reading DIP switches using the lowest possible power

circuit-design design low-power

answered Jul 1, 2021 at 20:58

22 votes

Accepted

Why are the outputs of these gates tied together in the Apollo Guidance Computer?

digital-logic schematics logic-gates history open-collector

answered May 10, 2021 at 19:16

22 votes

Does the voltage difference have an effect on the electrons' speed?

voltage

answered Jun 13, 2020 at 20:23

21 votes

Accepted

Why are PCIE's coupling capacitors so large

signal-integrity pcie

answered Aug 4, 2020 at 2:23

20 votes

Accepted

Cable standard for data and power

power connector serial cables power-line-communication

answered Aug 16, 2021 at 14:55

19 votes

Need for Almost Empty and Almost Full flags in a FIFO buffer

digital-logic fifo

answered Jul 2, 2021 at 9:57

18 votes

White LED doesn't light up when a red LED is parallel to it

arduino led diodes parallel

answered Nov 10, 2021 at 23:06

18 votes

High voltage electricity transport

high-voltage

answered Apr 14, 2020 at 17:02

17 votes

Accepted

How does a non-designer understand a chipset's functionality?

verification

answered May 20, 2020 at 0:16

17 votes

Accepted

Why is the stator coil wrapped with layers of metal disks instead of a whole metal block?

motor coil stator

answered Feb 27 at 8:28

15 votes

How can electricity be positive when electrons are negative?

power electricity charge electron

answered Sep 5, 2019 at 21:34

15 votes

LED in small Raspberry Pi circuit glows when it is meant to be off

led raspberry-pi

answered Jun 30, 2021 at 19:41

15 votes

Accepted

How to drive 700mA LED cheaply?

arduino power-supply led esp8266 led-driver

answered Apr 16, 2021 at 19:47

14 votes

Why are cables rated for current not power?

voltage power current resistors

answered Oct 15, 2020 at 16:41

14 votes

Accepted

Does the DC component of any signal also carry information?

signal signal-processing fourier system

answered Aug 16, 2021 at 18:18

14 votes

Accepted

Interview FPGA question about what I would power first

fpga power-sequencing

answered Aug 16, 2021 at 1:12

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1,358 Answers

Why is electricity consumption billed in watts and not amperes?

Is there a reason why we don’t supply power to a 2.5 mm or 3.5 mm jack?

What is the lowest level of CPU programming above transistors?

What is the purpose of this device?

Scam? Does having this capacitor wired as shown provide any surge protection?

Why is this meter giving different readings depending on its orientation?

Why are off grid solar setups only 12, 24, 48 VDC?

Do I still need a resistor in this LED series design?

What is the difference between CPU transistors and generic ones?

Why isn't the current split between the transistor and the LED in this NOT transistor circuit?

Achieving bit-perfect rendering of audio CDs

How do rechargeable 1.5 V batteries work?

Why do logic gates need multiple MOSFETs?

Professor said no current flows to ground

ATmega328P reading DIP switches using the lowest possible power

Why are the outputs of these gates tied together in the Apollo Guidance Computer?

Does the voltage difference have an effect on the electrons' speed?

Why are PCIE's coupling capacitors so large

Cable standard for data and power

Need for Almost Empty and Almost Full flags in a FIFO buffer

White LED doesn't light up when a red LED is parallel to it

High voltage electricity transport

How does a non-designer understand a chipset's functionality?

Why is the stator coil wrapped with layers of metal disks instead of a whole metal block?

How can electricity be positive when electrons are negative?

LED in small Raspberry Pi circuit glows when it is meant to be off

How to drive 700mA LED cheaply?

Why are cables rated for current not power?

Does the DC component of any signal also carry information?

Interview FPGA question about what I would power first