User Justme

56 votes

Accepted

UART signal is "rounded"

answered Jan 29, 2020 at 22:48

53 votes

Accepted

Why aren't resistors being used in this flip-flop used in static MOS RAM?

digital-logic resistors flipflop

answered Jun 8, 2021 at 13:13

50 votes

Accepted

Is the capacitor drawn or wired wrongly?

capacitor electrolytic-capacitor

answered May 29, 2019 at 5:18

47 votes

Accepted

Why did they design new connectors for USB?

usb connector

answered Dec 7, 2019 at 17:56

39 votes

Accepted

Two LEDs connected in series don't work

led stm32 series

answered Nov 15, 2021 at 13:12

34 votes

How does the network card determine the cable length?

measurement network

answered May 6, 2021 at 7:51

32 votes

What is the simplest way to invert a signal with just one jumper?

digital-logic

answered Nov 30, 2021 at 10:20

32 votes

How can a Cat 5 cable (frequency 100 MHz) transmit 2.5 gigabits/second?

frequency ethernet

answered Aug 3, 2021 at 8:08

31 votes

Why are color difference signals transmitted rather than R,G,B signals?

transmitter tv video-transmitter

answered Jul 21, 2020 at 21:49

31 votes

Why don't we have a circular USB port?

usb connector

answered Oct 23, 2020 at 11:34

30 votes

My DIY RGB LED panel powered by 9V battery works but certain colors like blue, white, and purple don't work

led battery-operated rgb color

answered Apr 17, 2021 at 21:13

29 votes

Accepted

Why aren't many classical logic gates reversible?

logic-gates

answered Aug 19, 2021 at 18:56

28 votes

Accepted

Why is my Arduino's GND pin emitting power instead of grounding it?

arduino power ground

answered Jun 30, 2021 at 19:40

27 votes

Accepted

Is there such a thing as a programmable power sink?

power test-equipment

answered May 10, 2020 at 22:34

27 votes

Suicidal ASUS power brick?

mosfet switch-mode-power-supply protection fuses surge-protection

answered Aug 25, 2021 at 13:34

26 votes

Accepted

Microcontroller works on breadboard, but not on PCB (which is proven to be correct)

microcontroller led pcb breadboard attiny

answered Dec 21, 2021 at 13:09

26 votes

Accepted

Can I connect two microcontrollers via RS232 separated by a distance of 3.5 inches? Both are on two separate PCBs

cmos rs232 max3232

answered May 2, 2021 at 15:26

25 votes

Reason for x86 reset vector being at 0xFFFFFFF0 instead of 0xFFFFFFFF

reset x86

answered Jul 6, 2020 at 9:19

25 votes

Why do motor drives have multiple bus capacitors of small value capacitance instead of a single bus capacitor of large value?

capacitor motordriver

answered Aug 29, 2019 at 17:02

25 votes

What is the purpose of tiny "bumps" on LED legs?

led

answered Sep 1, 2020 at 11:11

25 votes

Accepted

Ceramic resonator changes and maintains frequency when touched

oscillator resonance harmonics

answered Jan 8, 2021 at 22:46

24 votes

Accepted

Sawtooth wave in oscilloscope instead of a square wave

oscilloscope

answered Oct 23, 2021 at 21:20

24 votes

Accepted

Bridge rectifier: What is the purpose of these two elements?

circuit-analysis filter bridge-rectifier

answered Mar 26, 2021 at 21:32

23 votes

Why does a permanent, non-moving magnet, stuck to a long piece of metal generate a voltage?

voltage electromagnetism magnetics

answered Apr 11, 2020 at 20:31

22 votes

Accepted

Decoupling Capacitors: What happens to the DC on the cap once noise is introduced and it shorts?

noise low-pass decoupling-capacitor bypass-capacitor

answered Jan 20, 2020 at 8:26

22 votes

Why use two transistors driving LEDs when one would work?

transistors led pnp

answered Apr 2 at 19:48

21 votes

Shouldn't an I2C address be 7-bit binary?

integrated-circuit i2c serial-bus

answered Aug 1, 2021 at 18:33

20 votes

Accepted

What are VDDA and VSSA?

microcontroller power-supply stm32 schematics

answered Aug 26, 2020 at 19:55

20 votes

Why recommend tantalum over ceramic capacitor for voltage regulator?

capacitor voltage-regulator ceramic tantalum

answered Mar 29, 2021 at 9:52

19 votes

Accepted

What kind of IC is this, and how can I erase its memory to reuse it?

integrated-circuit identification memory reuse

answered Feb 26 at 9:49

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2,991 Answers

UART signal is "rounded"

Why aren't resistors being used in this flip-flop used in static MOS RAM?

Is the capacitor drawn or wired wrongly?

Why did they design new connectors for USB?

Two LEDs connected in series don't work

How does the network card determine the cable length?

What is the simplest way to invert a signal with just one jumper?

How can a Cat 5 cable (frequency 100 MHz) transmit 2.5 gigabits/second?

Why are color difference signals transmitted rather than R,G,B signals?

Why don't we have a circular USB port?

My DIY RGB LED panel powered by 9V battery works but certain colors like blue, white, and purple don't work

Why aren't many classical logic gates reversible?

Why is my Arduino's GND pin emitting power instead of grounding it?

Is there such a thing as a programmable power sink?

Suicidal ASUS power brick?

Microcontroller works on breadboard, but not on PCB (which is proven to be correct)

Can I connect two microcontrollers via RS232 separated by a distance of 3.5 inches? Both are on two separate PCBs

Reason for x86 reset vector being at 0xFFFFFFF0 instead of 0xFFFFFFFF

Why do motor drives have multiple bus capacitors of small value capacitance instead of a single bus capacitor of large value?

What is the purpose of tiny "bumps" on LED legs?

Ceramic resonator changes and maintains frequency when touched

Sawtooth wave in oscilloscope instead of a square wave

Bridge rectifier: What is the purpose of these two elements?

Why does a permanent, non-moving magnet, stuck to a long piece of metal generate a voltage?

Decoupling Capacitors: What happens to the DC on the cap once noise is introduced and it shorts?

Why use two transistors driving LEDs when one would work?

Shouldn't an I2C address be 7-bit binary?

What are VDDA and VSSA?

Why recommend tantalum over ceramic capacitor for voltage regulator?

What kind of IC is this, and how can I erase its memory to reuse it?