Elleanor Lopez‭

It was a firmware issue. SDS1xx4X-E Firmware Revision History And Update Instructions The hardware delay between ADC acquisitions was not accounted for. I flashed the scope with new firmware and ...

posted 2y ago by Elleanor Lopez‭

I was watching a video from EEVBLOG about bypass capacitors, and he presented a theory that randomly connecting different values of capacitors in parallel can create unexpected impedance spikes: ...

3 answers  ·  posted 2y ago by Elleanor Lopez‭  ·  last activity 2y ago by Andy aka‭

First I noticed that clock begins before chipselect gets pulled low on SPI. After eliminating potential sources I started to suspect the scope. I connected all 4 channels to function generator at d...

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

You have mentioned a few points yourself, so I will try to comment on those points and perhaps suggest some reasons to add or not to add a ground plane. You mentioned twisting (I suppose warping) ...

posted 1y ago by Elleanor Lopez‭  ·  edited 1y ago by Elleanor Lopez‭

Do micro-RF connector mating crimp connectors are ever sold separately together with a crimp tool? For example this I have looked through a lot of pages, and can only find PCB connectors + cable a...

1 answer  ·  posted 1y ago by Elleanor Lopez‭  ·  last activity 1y ago by DSI‭

I was looking for guidelines of how to select appropriate cables for applications (I am interested in DC), I found IEC 183 standard which talks about high voltage cable selection for AC. Also, the ...

1 answer  ·  posted 1y ago by Elleanor Lopez‭  ·  last activity 1y ago by Sclrx‭

Some gentlemen decided to throw a hook with wire over 750kV lines in Belarus. They survived, however, I find in interesting to find out why. Assuming the connection to Earth was solid, there would...

1 answer  ·  posted 8mo ago by Elleanor Lopez‭  ·  last activity 8mo ago by Olin Lathrop‭

Looking at Texas Instruments opamp OPA2211it mentions GBW of 80MHz at a gain of 100, and 45MHz at gain of 1: Looking at the bandwidth graph from Figure 10 in datasheet: It looks like 80MHz is...

2 answers  ·  posted 24d ago by Elleanor Lopez‭  ·  last activity 11d ago by Nick Alexeev‭

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 1y ago by Elleanor Lopez‭  ·  last activity 1y ago by Pogo‭

Rosenberger 23C25D-40ML5 specifies 500V RMS rating: Looking at the recommended landing pattern you can see that the distance between the signal landing pad and housing of the connector is 0....

1 answer  ·  posted 2mo ago by Elleanor Lopez‭  ·  last activity 2mo ago by Olin Lathrop‭

Noise can be coupled between signal lines through parasitic capacitance formed between these signal lines, as $i = C\frac{dv}{dt}$ where C is the capacitance between the signal lines. Another wa...

1 answer  ·  posted 1y ago by Elleanor Lopez‭  ·  last activity 1y ago by Olin Lathrop‭

For my own understanding I tried modelling switching off an inductive load without a freewheeling diode to observe ringing. This is the model I used: 1.) Are the two main components of the reson...

2 answers  ·  posted 7mo ago by Elleanor Lopez‭  ·  last activity 7mo ago by Olin Lathrop‭

I am looking at this RF connector. I see that insulation resistance and breakdown voltage are specified, but no voltage rating: I have two questions, one functional and one safety. Functionally...

2 answers  ·  posted 5mo ago by Elleanor Lopez‭  ·  last activity 5mo ago by Olin Lathrop‭

I have a bed for which the headrest can be adjusted. There are 2 separate power inputs for each side like in the picture: In addition, there is a set of 9V batteries on each side, presumably for...

2 answers  ·  posted 2mo ago by Elleanor Lopez‭  ·  last activity 2mo ago by absurdus‭

We have ESD tables in the laboratory with Earth Bonding Points: These are directly connected to PE (I measured). It is my understanding that equipment has to be connected to PE directly and ESD m...

1 answer  ·  posted 6mo ago by Elleanor Lopez‭  ·  last activity 6mo ago by Olin Lathrop‭