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66%
+2 −0
Q&A What is connector pitch and how to measure it?

Pitch is defined as the center-to-center measurement between two pins/legs of the component. Connectors in particular are always categorized by manufacturers/retailers based on pitch, so it is the...

posted 7mo ago by Lundin‭  ·  edited 7mo ago by Lundin‭

Answer
66%
+2 −0
Q&A High power LC circuit with programmable resonant frequency

I intend to build a high-power series LC resonant circuit for the purpose of generating strong magnetic fields at a wide range of frequencies, mostly audio range (1-5000 Hz). The inductor coil is a...

1 answer  ·  posted 2y ago by dcsuka‭  ·  edited 2y ago by dcsuka‭

Question LC-network capacitor power inductor AC-power
66%
+2 −0
Q&A Oscillator with non-rechargable battery

There actually seem to be two different questions here. Can a primary (non-rechargable) battery be damaged by forcing reverse current thru it? Yes. Primary batteries are only intended to source ...

posted 2y ago by Olin Lathrop‭  ·  edited 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Meta Apparent loss of reputation in last 24 hours

Has anyone else noticed a loss of reputation recently. I thought I checked yesterday and my reputation was a hundred points higher at 1889. Now it is at 1789. My vote summary doesn't indicate a los...

1 answer  ·  posted 1y ago by Andy aka‭  ·  last activity 1y ago by Monica Cellio‭

Question discussion bug support
66%
+2 −0
Q&A What is dynamic resistance? Is it related to differential resistance or to incremental resistance?

What is the concept behind the dynamic resistance that often pops up when dealing with non-linear components and the circuits in which they are employed? Is the concept related to other terms like...

1 answer  ·  posted 1y ago by Lorenzo Donati‭  ·  last activity 1y ago by Lorenzo Donati‭

Question dynamic-resistance
66%
+2 −0
Q&A Is ESD overhyped?

Yet another example. If using MOSFETs only for power switching applications, it can seem like these are "robust" and "immune" to ESD events. While the package clearly states "ESD sensitive", devi...

posted 1y ago by rdtsc‭

Answer
66%
+2 −0
Q&A Is the noise of op-amps and ADCs Gaussian, possibly with zero mean?

I understand that white noise is not always Gaussian. In general, is the $V_{pp}$ and $V_{RMS}$ noise stated in operational amplifier and ADC datasheets Gaussian? And is its mean zero? Any exemptio...

1 answer  ·  posted 1y ago by Joel‭  ·  last activity 1y ago by Lorenzo Donati‭

Question noise ADC opamp
66%
+2 −0
Q&A Titanic submarine control considerations

One of the challenges with this particular controller is that it's wireless. Wireless devices need a) a clear enough RF channel to the receiver and b) a suitable power supply, namely batteries. B...

posted 1y ago by Pogo‭

Answer
66%
+2 −0
Q&A Why do I need electrodes for ECG measurements?

When recording an ECG signal, the raw signal is taken from the body and sent into an ECG amplifier to amplify the signal to a suitable range and remove common mode and other types of noise. Measur...

1 answer  ·  posted 2y ago by Carl‭  ·  edited 1y ago by Lorenzo Donati‭

Question instrumentation-amplifier ECG measurement
66%
+2 −0
Q&A Why do I need electrodes for ECG measurements?

The electrodes electrically connect to the skin in order to pick up tiny signals produced by the heart muscles. Electrically you're a bag of saltwater. Your skin (the bag) has a relatively high r...

posted 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A Variant of a Mosfet's Gate-Source protection

Let's say a 100V voltage spike arrives at +12V and the TVS diode clamps it to 25V. Q2 may or may not be activated. Will this circuit ensure a V_gs lower than 25V for the mosfet Q1 ? Any catch to it...

1 answer  ·  posted 2y ago by kellogs‭  ·  last activity 2y ago by Olin Lathrop‭

Question MOSFET protection overvoltage TVS
66%
+2 −0
Q&A Floating circuitry and diodes

is the "X" point floating when there is no 12V applied ? Perhaps over a limited range, depending on whether the 12V line is left open or connected to something other than 12V. Case 1: The volt...

posted 1y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A How to convert dv/dt of noise into frequency for filter capacitor selection?

It looks like you've sort of re-discovered a motivation for Fourier analysis. The difference between looking at slope versus frequency content is exactly the difference between time domain and fre...

posted 2y ago by Olin Lathrop‭

Answer
66%
+6 −2
Q&A Titanic submarine control considerations

The submarine built by OceanGate went missing on 18th June 2023. A lot of online criticism was directed towards the control hardware of the submarine - Logitech F710 controller. However, why i...

3 answers  ·  posted 2y ago by Elleanor Lopez‭  ·  last activity 1y ago by Pogo‭

Question safety control
66%
+2 −0
Q&A High power LC circuit with programmable resonant frequency

What you are asking for is totally unrealistic, and your numbers don't add up. With 10 mH and 80 µF, the resonant frequency is 178 Hz. Getting down to 1 Hz even with 10 mH would require over 2.5 ...

posted 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Meta Should posting on Meta affect reputation?

When we launched this community, we did not yet have the ability to set different reputation grants for different categories. We've had this for a while but we failed to follow up before now, sorr...

1 answer  ·  posted 2y ago by Monica Cellio‭  ·  edited 1y ago by Olin Lathrop‭

Question discussion status-completed
66%
+2 −0
Q&A Choosing between common-drain JFET amplifier, and common-source

The first circuit uses the FET in follower mode. That means it works as an impedance buffer with a gain a little below 1. Such configuration can be useful to turn a high impedance signal into a l...

posted 1y ago by Olin Lathrop‭  ·  edited 1y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A micro-RF connector crimping options

I've not seen them sold separately through distributors like Mouser and such, and have not seen any hand tools for these. I found this document and this video - it looks like the machines are semi-...

posted 2y ago by DSI‭  ·  edited 2y ago by DSI‭

Answer
66%
+2 −0
Q&A Variant of a Mosfet's Gate-Source protection

If the TVS truly clamps the "+12V" line to 25 V, then the VGS of Q1 can't exceed 25 V. However, if you want to limit the gate voltage, limit the gate voltage. A Zener between gate and source guar...

posted 2y ago by Olin Lathrop‭

Answer
66%
+2 −0
Q&A How to change the polarity of an input using a single switch?

I have an mcu pin and I want to sense a voltage up to 24V to 36V. I want to connect some outputs on the board I'm designing and I don't know whether those outputs will provide a voltage or will be...

1 answer  ·  posted 2y ago by DeadMouse‭  ·  edited 1y ago by Lorenzo Donati‭

Question microcontroller BJT
63%
+5 −2
Meta Please find other ways to hide inloved questions that prompt close

Here's the thing, and this is where I think there's a disconnect of understanding. On Stack Exchange, and to a similar extent here, question closure signals "this question is not suitable for this ...

posted 4y ago by ArtOfCode‭

Answer
62%
+3 −1
Q&A How to plot the I-V curve of a tunnel diode?

I am trying to understand tunnel diodes by experimenting with them. Research tells me they can have negative resistance, and can be used to build a high frequency oscillator. Tunnel diodes are su...

4 answers  ·  posted 4y ago by tlfong01‭  ·  edited 1y ago by Lorenzo Donati‭

Question semiconductor-diode tunnel-diode component-characterization
62%
+3 −1
Q&A Microwave oven interfering with WiFi on the 2.4GHz band

As I understand it, microwave oven magnetrons operate at 2.45GHz, which is an unlicensed band in most of the world. When 2.4GHz technologies such as WiFi (802.11), Bluetooth and Zigbee were launche...

2 answers  ·  posted 4y ago by Lundin‭  ·  last activity 4y ago by TonyStewart‭

Question EMC RF WiFi EMI radio
62%
+3 −1
Meta Name of the OP in the list of questions

Is it possible to add the name of the OP near each question inside the question list? Only the name of the "last activity" person appears there. For me, that would help. I would like to see somet...

1 answer  ·  posted 4y ago by coquelicot‭  ·  edited 4y ago by Monica Cellio‭

Question feature-request
62%
+3 −1
Q&A How to check realistic specs of small solar panel?

All good designs and design testing is based on information contained in the component data sheets. A solar panel is no different so, you need to establish the operating conditions for measuring vo...

posted 2y ago by Andy aka‭

Answer