User pjc50

73 votes

Accepted

Why are all my yellow 2V/20mA LEDs burning out with 330k Ohm resistor?

answered Jul 10, 2019 at 14:40

69 votes

Can a CPU function with nothing more than a power supply and a ROM, using only the internal cache as RAM?

answered Jun 19, 2017 at 15:23

67 votes

Accepted

Why is there no `nand` instruction in modern CPUs?

answered Jan 17, 2017 at 16:46

48 votes

Accepted

Why aren't fully asynchronous circuits more prevalent?

answered Feb 4, 2019 at 16:59

46 votes

Accepted

How did scientists deal with electronics' problems before Kirchhoff and Ohm's laws?

answered Dec 2, 2016 at 9:10

45 votes

How to solder wires on Li-ion cell phone batteries?

answered Sep 30, 2015 at 9:44

41 votes

Batteries. Why use 9V?

answered Aug 8, 2017 at 14:29

39 votes

Accepted

Differences between OLED, LED, LCD, and TFT Screens

answered Jun 12, 2013 at 16:36

32 votes

Is voltage the speed of electrons?

answered Jul 12, 2016 at 11:18

32 votes

Accepted

Is it ok to place 220V AC traces on my Arduino PCB?

answered Nov 23, 2020 at 11:01

32 votes

How can you achieve decent clock accuracy in microcontrollers (e.g., max 1 second drift in a year)? How do digital watch manufacturers accomplish it?

answered Feb 24, 2023 at 9:59

31 votes

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

answered Feb 27, 2016 at 20:03

28 votes

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

answered Aug 10, 2022 at 8:57

26 votes

Why not make one big CPU core?

answered Jun 12, 2019 at 12:02

25 votes

How do I improve a simple home-made capacitor?

answered Dec 29, 2021 at 11:00

25 votes

Accepted

Can FPGA out perform a multi-core PC?

answered Nov 28, 2014 at 10:27

24 votes

Why does a processor get hot?

answered Mar 17, 2015 at 14:56

24 votes

Can I turn Radio waves into light?

answered Sep 29, 2014 at 11:00

24 votes

Do you need high voltage or current to produce a spark?

answered May 22, 2018 at 9:16

23 votes

Accepted

How can I access more than 15 addresses of data from my 8 bit incomplete computer?

answered Sep 28, 2020 at 9:05

23 votes

When can FPGA's be used and Microcontrollers/DSPs not?

answered Jan 22, 2014 at 16:43

22 votes

How do devices like the Game Boy Advance achieve their frame rate?

answered Dec 17, 2018 at 19:29

21 votes

Do manufacturers try make their components as close to ideal ones as possible?

answered May 31, 2019 at 12:05

21 votes

When do capacitors "decide" to discharge?

answered May 20, 2020 at 13:40

21 votes

How can I use SPI and I²C at the same time?

answered Mar 14, 2021 at 21:14

21 votes

What is the truth about 1.5 V "lithium" cells?

answered Dec 23, 2016 at 17:51

20 votes

How does my screen driver handle so much data?

answered Jan 9, 2017 at 10:30

20 votes

Accepted

In which direction do electric signals flow?

answered Feb 3, 2021 at 9:54

20 votes

Accepted

From C to Assembly

answered Oct 28, 2013 at 13:25

19 votes

Using CPU heat to generate electricity

answered Jun 7, 2017 at 12:57

Stack Exchange Network

1,189 Answers

Why are all my yellow 2V/20mA LEDs burning out with 330k Ohm resistor?

Can a CPU function with nothing more than a power supply and a ROM, using only the internal cache as RAM?

Why is there no `nand` instruction in modern CPUs?

Why aren't fully asynchronous circuits more prevalent?

How did scientists deal with electronics' problems before Kirchhoff and Ohm's laws?

How to solder wires on Li-ion cell phone batteries?

Batteries. Why use 9V?

Differences between OLED, LED, LCD, and TFT Screens

Is voltage the speed of electrons?

Is it ok to place 220V AC traces on my Arduino PCB?

How can you achieve decent clock accuracy in microcontrollers (e.g., max 1 second drift in a year)? How do digital watch manufacturers accomplish it?

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

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

Why not make one big CPU core?

How do I improve a simple home-made capacitor?

Can FPGA out perform a multi-core PC?

Why does a processor get hot?

Can I turn Radio waves into light?

Do you need high voltage or current to produce a spark?

How can I access more than 15 addresses of data from my 8 bit incomplete computer?

When can FPGA's be used and Microcontrollers/DSPs not?

How do devices like the Game Boy Advance achieve their frame rate?

Do manufacturers try make their components as close to ideal ones as possible?

When do capacitors "decide" to discharge?

How can I use SPI and I²C at the same time?

What is the truth about 1.5 V "lithium" cells?

How does my screen driver handle so much data?

In which direction do electric signals flow?

From C to Assembly

Using CPU heat to generate electricity