Elleanor Lopez
A quiet enigma. We don't know anything about Elleanor Lopez yet.
Posts
See all 29 »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 4y 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 4y ago by Elleanor Lopez · last activity 4y 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 4y ago by Elleanor Lopez · last activity 4y 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 3y ago by Elleanor Lopez · edited 3y 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 3y ago by Elleanor Lopez · last activity 3y ago by DSI
ADE7933 contains an isolated DC-DC converter (Page 82). The control uses ~1MHz PWM signal with unknown rise time, but assuming something like 10ns, most of the energy would be contained in the 35MH...
1 answer · posted 10mo ago by Elleanor Lopez · last activity 10mo ago by Nick Alexeev
In the AM2224-1000 datasheet for the '1000' model the following parameters are given: Nominal voltage per phase: 1.4V Back-EMF amplitude: 3.8V/k step/s There is also torque/speed gra...
2 answers · posted 11mo ago by Elleanor Lopez · last activity 9mo ago by Elleanor Lopez
Hi, I am designing a system using STM32WB55CEU6 and I want to use the RF functionality. Looking at evaluation board I see that there is a matching network for the output pin. The datasheet does no...
2 answers · posted 1y ago by Elleanor Lopez · last activity 1y ago by Olin Lathrop
In many hobby and even commercial designs, people use generic wire-wound inductors or common-mode chokes that do not have a specified insulation or hipot voltage rating. Drum-core inductors are som...
2 answers · posted 9mo ago by Elleanor Lopez · last activity 9mo ago by Olin Lathrop
The typical GPIO protection circuit can be seen here: In most articles online this type of protection just boils down to 'excess current is dumped into the VDD rail'. However, where does it actu...
1 answer · posted 1y ago by Elleanor Lopez · edited 1y ago by Nick Alexeev
I want to use ADG726 multiplexer for an application where the multiplexer inputs could have potential on them before ADG726 is powered up. Seeing that ADG726 is a CMOS device, it seems it might be ...
1 answer · posted 1y ago by Elleanor Lopez · last activity 1y 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 2y ago by Elleanor Lopez · last activity 2y ago by Nick Alexeev
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 2y ago by Elleanor Lopez · last activity 2y ago by Olin Lathrop
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 2y ago by Elleanor Lopez · last activity 2y ago by Olin Lathrop
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 3y ago by Elleanor Lopez · last activity 3y ago by Sclrx
