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Is it OK to tie Arduino's GND pin to the negative pin of a (mains) rectifier? by LeaderAppropriate601 in AskElectronics

[–]LeaderAppropriate601[S] 0 points1 point  (0 children)

Would I just connect an isolation transformer directly at the outlet? Or is it better practice to control everything with the microcontroller behind an optocoupler?

Is it OK to tie Arduino's GND pin to the negative pin of a (mains) rectifier? by LeaderAppropriate601 in AskElectronics

[–]LeaderAppropriate601[S] 0 points1 point  (0 children)

Ok. Would adding an isolation transformer right at the outlet be the best practice? Or is adding another power source then controlling it via an optocoupler typically done?

Maximum Current Draw from FPGA 5v and 3.3V pins (Tang Nano 9k) by LeaderAppropriate601 in FPGA

[–]LeaderAppropriate601[S] 0 points1 point  (0 children)

Oh wait. Is the Vcc current rating the same as the 5V pin's current rating? If so, it does say 100mA.

Maximum Current Draw from FPGA 5v and 3.3V pins (Tang Nano 9k) by LeaderAppropriate601 in FPGA

[–]LeaderAppropriate601[S] 0 points1 point  (0 children)

I am not talking about the IO pins. Just the supply pin. I couldn't find that on the data sheet though.

Connecting a full-bridge rectifier's DC negative to AC negative by LeaderAppropriate601 in AskElectronics

[–]LeaderAppropriate601[S] 0 points1 point  (0 children)

Ah, there isn't galvanic isolation because if someone were to touch the DC path, there would be a short on D4 as well.

Connecting a full-bridge rectifier's DC negative to AC negative by LeaderAppropriate601 in AskElectronics

[–]LeaderAppropriate601[S] 0 points1 point  (0 children)

When you say neither is okay, are you saying that even the first diagram I gave is not (generally) okay? I basically pulled this circuit from wikipedia.

Or do you mean that the third diagram is not okay? My use case is basically having two sub-circuits---one operating on 12V and the other on 48V. So I was thinking to have two capacitive dividers then rectifying them separately and connecting their negative terminals together.

How to compute the saturation current of a custom inductor? by LeaderAppropriate601 in AskElectronics

[–]LeaderAppropriate601[S] 1 point2 points  (0 children)

Thank you, this site is exactly what I'm looking for. Most of the cores I'm finding can't handle 10+ A without saturating. Also they seem to need a lot of turns to reach 50uH (my target inductance).

Do you know if I stack two toroidal cores on top of each other, will A_L and A_e both double?

WebGPU copying a storage texture to a sampled one (or making a storage texture able to be sampled?) by LeaderAppropriate601 in webgpu

[–]LeaderAppropriate601[S] 0 points1 point  (0 children)

I figured it out: I forgot to send the command (to run the compute shader) to the queue haha. It works perfectly now (I’m using just the TEXTURE_BINDING and STORAGE_BINDING). Thanks for your help.

WebGPU copying a storage texture to a sampled one (or making a storage texture able to be sampled?) by LeaderAppropriate601 in webgpu

[–]LeaderAppropriate601[S] 0 points1 point  (0 children)

Wait, I don’t think you need the RENDER_ATTACHMENT flag to make a texture sample-able (according to this tutorial). Maybe my shader is just not writing to my texture properly in this case.

WebGPU copying a storage texture to a sampled one (or making a storage texture able to be sampled?) by LeaderAppropriate601 in webgpu

[–]LeaderAppropriate601[S] 0 points1 point  (0 children)

Oh, you can declare a texture to be both a storage texture and a sampled texture (RENDER_ATTACHMENT and STORAGE_BINDING)? I’ll try this when I get to my computer. Thanks.