User glen_geek

40 votes

Accepted

Why is crystal frequency often multiplied inside a microcontroller?

answered Mar 12, 2023 at 14:26

39 votes

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Is it possible to jam wireless home alarm systems?

answered Feb 28, 2017 at 19:30

29 votes

I have 5 kV available to create a spark. Is limiting the current to 500 µA as simple as putting a 10 MΩ resistor in series?

answered Nov 30, 2022 at 20:34

28 votes

The LED is dead... Why?

answered Jun 25, 2023 at 14:58

21 votes

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What is this waxy stuff?

answered Jul 14, 2017 at 13:33

21 votes

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This op-amp buffer is oscillating and I can't figure out why

answered Dec 22, 2018 at 15:36

20 votes

Circuit for flashing LEDs for airplane model wing, tail and beacon lights using 555

answered Jan 13, 2017 at 15:33

20 votes

Why doesn't the capacitor fill to the maximum?

answered Oct 4, 2022 at 16:12

18 votes

Accepted

Why does a full-wave bridge rectifier have noisy output with no load?

answered Jun 10, 2022 at 11:21

18 votes

Why is my linear taper potentiometer nonlinear at the end points?

answered Jul 24, 2017 at 14:21

18 votes

Would you approve this soldering job?

answered Jun 3, 2020 at 16:12

17 votes

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Reasons for implementing op-amps which are not unity-gain stable

answered May 19 at 20:00

16 votes

What purpose are the transistors serving in this CRT oscilloscope circuit?

answered Feb 13, 2020 at 0:11

14 votes

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pull-ups between logic gates

answered Dec 18, 2019 at 16:34

14 votes

What is the need for using active low inputs like EN' (read as "Enable bar") in digital electronic circuits?

answered Jul 16, 2020 at 13:27

14 votes

Accepted

Crater-like features on thick leads soldering - is this a soldering defect and should I be worried?

answered Dec 28, 2021 at 15:40

13 votes

Reasons to use combinations of resistors (parallel or in series): Looking for educational examples

answered Jan 25 at 14:26

13 votes

Accepted

Just inherited a digital phosphor oscilloscope and trying to figure out why the sine wave is doubled

answered Mar 16 at 2:15

13 votes

Can I disable a battery powered device by reversing half of its batteries?

answered Sep 9, 2019 at 23:06

13 votes

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Is it possible for an opamp to oscillate at a frequency greater than its GBP?

answered Sep 28, 2017 at 14:19

12 votes

Accepted

Polarity of gas discharge tubes

answered Sep 1, 2019 at 15:06

12 votes

Non-inverting amplifier ; Single supply ; Bipolar input

answered Jun 30, 2019 at 19:40

12 votes

How did old television screens with a light grey phosphor create the darker contrast parts of the display?

answered Feb 7, 2021 at 15:54

11 votes

Accepted

How to set an oscilloscope for measurement of interrupt service routine execution time

answered Jun 26, 2020 at 13:47

11 votes

A really basic question about ammeters and their ranges

answered Dec 4, 2019 at 17:11

10 votes

Using a miniature BNC connector on a PCB to measure high-frequency content with an oscilloscope

answered Feb 18, 2021 at 14:06

10 votes

Accepted

Will this radio receiver work?

answered Oct 16 at 18:02

10 votes

How can I make a reliable tick tock sound electro-mechanically?

answered Feb 11, 2023 at 3:50

10 votes

Why is there a polarized capacitor symbol in an AC circuit?

answered Jun 13, 2023 at 12:51

10 votes

Are there two sorts of geometry of JFET?

answered Jul 19, 2021 at 13:33

Stack Exchange Network

970 Answers

Why is crystal frequency often multiplied inside a microcontroller?

Is it possible to jam wireless home alarm systems?

I have 5 kV available to create a spark. Is limiting the current to 500 µA as simple as putting a 10 MΩ resistor in series?

The LED is dead... Why?

What is this waxy stuff?

This op-amp buffer is oscillating and I can't figure out why

Circuit for flashing LEDs for airplane model wing, tail and beacon lights using 555

Why doesn't the capacitor fill to the maximum?

Why does a full-wave bridge rectifier have noisy output with no load?

Why is my linear taper potentiometer nonlinear at the end points?

Would you approve this soldering job?

Reasons for implementing op-amps which are not unity-gain stable

What purpose are the transistors serving in this CRT oscilloscope circuit?

pull-ups between logic gates

What is the need for using active low inputs like EN' (read as "Enable bar") in digital electronic circuits?

Crater-like features on thick leads soldering - is this a soldering defect and should I be worried?

Reasons to use combinations of resistors (parallel or in series): Looking for educational examples

Just inherited a digital phosphor oscilloscope and trying to figure out why the sine wave is doubled

Can I disable a battery powered device by reversing half of its batteries?

Is it possible for an opamp to oscillate at a frequency greater than its GBP?

Polarity of gas discharge tubes

Non-inverting amplifier ; Single supply ; Bipolar input

How did old television screens with a light grey phosphor create the darker contrast parts of the display?

How to set an oscilloscope for measurement of interrupt service routine execution time

A really basic question about ammeters and their ranges

Using a miniature BNC connector on a PCB to measure high-frequency content with an oscilloscope

Will this radio receiver work?

How can I make a reliable tick tock sound electro-mechanically?

Why is there a polarized capacitor symbol in an AC circuit?

Are there two sorts of geometry of JFET?