User uhoh

25 votes

How do lasers measure short distances (<1cm) when electronics are too slow for time-of-flight to work?

answered Sep 30, 2019 at 7:50

16 votes

Why is the reflector on this millimeter-wave antenna spinning?

answered Feb 12, 2017 at 16:55

14 votes

Accepted

Why do silicon wafers look rainbow colored?

answered Jul 4, 2021 at 2:18

7 votes

Construction for a homogeneous field using permanent magnets

answered Jul 26, 2020 at 4:32

7 votes

Accepted

What does a transistor look like in the Intel 4004 microchip?

answered Feb 7, 2019 at 2:05

6 votes

Where are the rare earth elements in electronics?

answered Aug 22, 2020 at 1:03

5 votes

What kind of hardware implements Fourier transform?

answered Mar 1, 2019 at 18:01

5 votes

MPU6050 accel/gyro noise that behaves strangely - what might be doing this?

answered Oct 10, 2017 at 10:19

4 votes

Omnidirectional LED, is it possible?

answered Jul 30, 2019 at 23:25

3 votes

Strange LED behavior: Why is there a voltage over the LED with only one wire connected to it?

answered Jul 23, 2019 at 8:25

3 votes

Are there types of standard coaxial cable with a propagation velocity of 0.9c? What would be the application?

answered Sep 25, 2017 at 19:52

2 votes

Accepted

How to detect potentially poor antenna placement from GPS data?

answered Dec 28, 2018 at 1:54

2 votes

In the recent Con-Ed transformer "fire", what exactly produced the color of the huge blue glow over New York City?

answered Dec 29, 2018 at 2:19

2 votes

Measure distance using an ultrasonic sensor in a pipe

answered Jul 18, 2020 at 7:02

2 votes

A few questions on PIRs and other motion detectors

answered Jun 13, 2021 at 4:37

1 vote

Can a photodiode emit light?

answered Jan 20, 2019 at 11:51

1 vote

Can i put a resistor in backwards?

answered May 2, 2016 at 19:15

0 votes

How does this quartz antenna work?

answered May 21, 2017 at 6:49

0 votes

What exactly does C/No (dBHz) mean in u-Blox GPS data?

answered Jan 12, 2019 at 8:07

0 votes

Accepted

Need help understanding why noise temperatures are added, but real temperatures aren't

answered Sep 1, 2018 at 12:58

-4 votes

How can a crossed dipole (turnstile) antenna be omnidirectional in 3D?

answered Sep 13, 2020 at 12:19

Stack Exchange Network

21 Answers

How do lasers measure short distances (<1cm) when electronics are too slow for time-of-flight to work?

Why is the reflector on this millimeter-wave antenna spinning?

Why do silicon wafers look rainbow colored?

Construction for a homogeneous field using permanent magnets

What does a transistor look like in the Intel 4004 microchip?

Where are the rare earth elements in electronics?

What kind of hardware implements Fourier transform?

MPU6050 accel/gyro noise that behaves strangely - what might be doing this?

Omnidirectional LED, is it possible?

Strange LED behavior: Why is there a voltage over the LED with only one wire connected to it?

Are there types of standard coaxial cable with a propagation velocity of 0.9c? What would be the application?

How to detect potentially poor antenna placement from GPS data?

In the recent Con-Ed transformer "fire", what exactly produced the color of the huge blue glow over New York City?

Measure distance using an ultrasonic sensor in a pipe

A few questions on PIRs and other motion detectors

Can a photodiode emit light?

Can i put a resistor in backwards?

How does this quartz antenna work?

What exactly does C/No (dBHz) mean in u-Blox GPS data?

Need help understanding why noise temperatures are added, but real temperatures aren't

How can a crossed dipole (turnstile) antenna be omnidirectional in 3D?