User Dirk Bruere

66 votes

10 answers

56k views

Fan and heatsink - suck or blow?

asked May 16, 2017 at 8:44

49 votes

5 answers

15k views

Why do 1 pF capacitors exist?

asked Dec 9, 2016 at 14:29

42 votes

4 answers

23k views

How efficient are LEDs?

asked Aug 25, 2017 at 9:29

33 votes

10 answers

17k views

PCB colors - what's available, and why?

asked Aug 30, 2017 at 9:12

26 votes

2 answers

6k views

Anti-static bags - safe to support powered circuit boards?

asked Nov 2, 2015 at 10:55

25 votes

17 answers

12k views

What is a sine wave?

asked May 23, 2018 at 11:09

24 votes

8 answers

4k views

LEDs on boards - pros and cons?

asked Aug 13, 2020 at 8:53

22 votes

7 answers

8k views

C - wrapping globals in a struct?

asked Nov 19, 2019 at 14:17

18 votes

3 answers

4k views

Are traditional vacuum tubes still used anywhere? [closed]

asked Mar 11, 2016 at 13:38

17 votes

4 answers

3k views

Can we tell which way AC power is going through a cable without cutting the cable?

asked Oct 21, 2021 at 7:42

12 votes

8 answers

2k views

Detecting stalled AC fan in high-temperature system

asked Jan 25 at 14:18

12 votes

5 answers

2k views

Change in resonant frequency of quartz crystal with atmospheric pressure?

asked Apr 30, 2018 at 14:41

11 votes

4 answers

3k views

High current melting a spanner - what's happening?

asked Jun 18, 2018 at 16:49

11 votes

1 answer

1k views

Storage of electrolytic capacitors - how long?

asked Mar 20, 2019 at 10:56

9 votes

6 answers

4k views

Can a PWM with 1% resolution in a PID heater loop achieve better than 1% temperature accuracy?

asked Nov 22, 2017 at 13:36

8 votes

6 answers

13k views

In a multicore cable, what is the nylon "string"?

asked Aug 23, 2016 at 15:11

8 votes

1 answer

300 views

Aging LEDs - does their output drop after turn-on?

asked Jul 24, 2019 at 13:23

8 votes

3 answers

1k views

Magnetic braking - solid metal or coil?

asked Sep 5, 2022 at 11:16

7 votes

4 answers

3k views

When a current flow in an inductor is interrupted, what limits the voltage rise?

asked May 28, 2019 at 8:49

7 votes

2 answers

2k views

Shorting a high voltage electrolytic - damaging?

asked Dec 17, 2018 at 12:05

7 votes

2 answers

2k views

In an ADC what are the units of resolution called?

asked Sep 4, 2015 at 8:38

6 votes

2 answers

632 views

Preparing a 100 Ohm resistor for use as a PT100 standard

asked Oct 5, 2015 at 13:34

6 votes

1 answer

4k views

Air cooled heatsinks - horizontal or vertical fins?

asked Jul 15, 2018 at 14:55

5 votes

3 answers

640 views

Why do MCUs typically have so little buffering on the USARTSs?

asked Apr 27, 2018 at 14:35

5 votes

1 answer

1k views

Using 24 bit audio DAC for low frequency/DC output?

asked Sep 15, 2016 at 9:43

5 votes

6 answers

1k views

Ultrastable capacitor wrt temperature

asked May 4, 2016 at 9:07

5 votes

5 answers

18k views

Any way to monitor current sourced by USB?

asked Aug 6, 2015 at 10:15

5 votes

2 answers

622 views

Why does an opto-isolated SSR specify a maximum number of cycles per second?

asked Apr 12, 2016 at 13:21

4 votes

1 answer

693 views

Problems involved in going from 0805 to (say) 0402 surface mount?

asked Jan 29, 2016 at 11:10

4 votes

2 answers

1k views

Temperature stability of capacitor materials

asked Oct 28, 2015 at 10:17

Stack Exchange Network

212 Questions

Fan and heatsink - suck or blow?

Why do 1 pF capacitors exist?

How efficient are LEDs?

PCB colors - what's available, and why?

Anti-static bags - safe to support powered circuit boards?

What is a sine wave?

LEDs on boards - pros and cons?

C - wrapping globals in a struct?

Are traditional vacuum tubes still used anywhere? [closed]

Can we tell which way AC power is going through a cable without cutting the cable?

Detecting stalled AC fan in high-temperature system

Change in resonant frequency of quartz crystal with atmospheric pressure?

High current melting a spanner - what's happening?

Storage of electrolytic capacitors - how long?

Can a PWM with 1% resolution in a PID heater loop achieve better than 1% temperature accuracy?

In a multicore cable, what is the nylon "string"?

Aging LEDs - does their output drop after turn-on?

Magnetic braking - solid metal or coil?

When a current flow in an inductor is interrupted, what limits the voltage rise?

Shorting a high voltage electrolytic - damaging?

In an ADC what are the units of resolution called?

Preparing a 100 Ohm resistor for use as a PT100 standard

Air cooled heatsinks - horizontal or vertical fins?

Why do MCUs typically have so little buffering on the USARTSs?

Using 24 bit audio DAC for low frequency/DC output?

Ultrastable capacitor wrt temperature

Any way to monitor current sourced by USB?

Why does an opto-isolated SSR specify a maximum number of cycles per second?

Problems involved in going from 0805 to (say) 0402 surface mount?

Temperature stability of capacitor materials