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## Solar Li-Ion Charging with load-sharing

I need some help regarding my project. I have made a dog feeder with Arduino Uno, which is powered with a 3000mAh Li-Ion battery. I want the system to be charged with a solar panel (more solar panels can be wired in parallel to increase current output), so I am using THIS module. However, I […]

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## Clearance between planes in a split plane layer?

When creating a split-plane layer, my cad package (SW PCB, based on Altium) uses simple primitives to draw the border between the plane regions. It seems to take those primitive dimensions and transfer them directly to the gerbers. I expected it would take DRC rules into account, using the primitive centerlines as the midpoint between […]

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## capacitor in schematic without unit

Can you help me identify the correct values of the marked capacitors? And what are the values between the brackets? As a bonus question: What is the purpose of this transistors? The schematics show a one line UART with 13V, 500 boud. The upper part is the receiving part, the lower for sending. Thank you.

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## Breadcrumbs – Data Vocabulary.org Error

I’ve just been on google console and it came up with the following error: data-vocabulary.org schema depreciated (optional) How can I fix this?

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## Aliased signal has phase shift due to Nyquist

Let’s say I have a pure sinusoid at 135MHz and I am sampling at 150MHz (so fin < 2fs). So now in my first Nyquist zone, I will see a 15MHz alised component. From my understanding, the 15MHz signal and the 135MHz signal will look the exact same when sampled. I read somewhere that, they […]

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## How are oscillator circuits characterized in a lab after their manufacture?

I know that ADCs are characterized by their INL, DNL ect parameters, but how about the oscillator circuits? If we need to test/characterize an oscillator circuit block of a circuit on a test board what parameters and methods are mostly investigated?

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## Magento 2 Images Not Showing in FTP under /pub/static/frontend/…./images

I ran a GTMetrix performance check on one of my client websites Losslessly compressing https://www.buzzyblends.co.uk/pub/static/frontend/buzzy/default/en_GB/images/healthy.jpg could save 15.9KiB (27% reduction). See optimized version. Losslessly compressing https://www.buzzyblends.co.uk/pub/static/frontend/buzzy/default/en_GB/images/linkedin.jpg could save 12.4KiB (81% reduction). See optimized version. and similar findings under the /pub/static/frontend/buzzy/default/en_GB/images folder. But when I traversed the folders via FTP, the images were not present on […]

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## Calculate total harmonic distortion

I have the following problem. MY ATTEMPT I found the formula for the total harmonic distortion to be this: \$THD = \frac{\sqrt{V_2^2+V_3^2+V_4^2+V_5^2+…}}{V_1} \$, where the subscript denotes the harmonic. Looking at the spectrum above, it seems like I’m supposed to make the following conclusions: V1 = 18.9241, V2 = -67.363, V3 = -8.5635, V4 = […]

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## How to filter product by MSI Salable Quantity > 0 in Admin Panel

How can I add a filter in the Admin Panel products grid to filter (display only) product with Salable Quantity > 0 in Multi Source Inventory?

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## European Cooktop for use in US split phase

I was wondering if someone could give me some advice. I’m an architect so I only know so much about electrical engineering. I have this cooktop I ordered from Italy, it’s an induction cooktop that’s from Elica. This cooktop supports 220v-240v ~ 50Hz/60Hz, 380v-415 ~ 2N ~ 50Hz/60Hz, and 380v-415v ~ 3N ~ 50Hz/60Hz. See […]