electronics

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Faceman2K23, in Ah, there you are!
@Faceman2K23@discuss.tchncs.de avatar

Just imagine the Forrest gump waving gif here...

tbe, in Welcome to Electronics

Thanks for starting a new home for the community ☺️.

Do we like emojis here or rather not? :D

Krististrasza,

As long as a strict limit of one emoji per paragraph is kept and we don't make posts look like MLM invites.

CircuitGuy,
@CircuitGuy@lemmy.world avatar

I used to think emojis were odd, but now I really like them. They are so clear. I can't read emotions from faces, except for emotional vs not emotional. But emojis are easier. I wish people looked more like emojis. 😊

DavideAndrea,

Do we like emojis

Personally, I don't use them. Other than that, I have no opinion. Do you like emojis?

tbe,

It actually depends, on longer posts they somehow disturb the reading flow for me (because they are kind of distracting compared to plain text). For short comments on the other hand I like them and find them rather refreshing.

JustEnoughDucks,

Personally I think that in the modern age they add what is missing from text conversations: intonation.

If you are sarcastic, joking, serious, etc... it can add a lot of social context.

Faceman2K23,
@Faceman2K23@discuss.tchncs.de avatar

I don't mind emojis if they are used properly. just that replying with a block of 100 emojis is spammy. so is replying with a single emoji.

glibg10b, in Got my electric cooler box working again 😁

The Nano’s PWM frequency can be adjusted from the default 490 Hz, with a maximum of 4MHz, at which point the resolution is 4. At a resolution of 256 (which is more than enough for this application), the maximum PWM frequency is 62.5 kHz, which is far outside our hearing range, though can still barely be heard by some younger cats

lemann,

Neat, thanks for the info!

I did some further reading into this and found out the PWM pins I’m using are controlled by their own separate timer (instead of the one used by the Arduino core for millis(), micros() etc) so definitely will be trying this out the next time I rip the cooler open 😁

linker3000, in Community seems dead. Can we mirror reddit posts here?

After 9 days, the upvotes and downvotes are tied so nothing changes for now, but we can revisit later.

Personally, I’d prefer organic growth rather than reposting stuff from Reddit.

Spread the word about the sub!

JustEnoughDucks, in My customisable solar hot water system controller (project in progress)
@JustEnoughDucks@feddit.nl avatar

Just as a PCB designer, make sure that you spec out the 240V voltage neutral and live copper trace width to the current going through them. For example, at 10 amps, those traces look much too small. Is it going to be in a high humidity environment? The spacing between traces also should be bigger for creepage/clearance reasons.

Cool project though!

dgriffith,

Yes the traces are pretty light for those kinds of currents, and I did have some concerns on the track spacing around the SCR and the screw terminals. The fatter tracks use a spacing for 240v that I looked up online.

Humidity here isn’t “tropical” as such, the board will probably get a coat of lacquer anyway.

The circulating pump is rated at 240v/20 watts (so not much current when it’s running steady state), and the SCR I’m using is good for a few amps of continuous current draw with a fairly high surge current. The SCR has minimal heatsinking so it will go first in extended high current situations, there’s going to be a panel mount fuse before all of this that I’ll probably set to 2 amps or so.

The zero-crossing SCR controller I’m using “should” prevent switching on the pump at the peaks of the mains cycle so max current should just be the initial stall current from the motor before it gets up to speed.

The pump is an induction motor so the only concern I’ve got is false triggering of the SCR and being unable to turn the pump off once triggered. I used an example snubber circuit from the data sheet of the zero crossing controller and of course they said “your milage may vary”.

al177, in Use Cases And Value Proposition Of eFPGA (Embedded FPGA)

This makes sense only if you’re rolling your own silicon, and it depends on the application. I could see this as an alternative to a scalar DSP core or to provide more flexible high speed interfaces. The unspoken cost is going to be adding another proprietary set of tooling in the BSP for your chip.

tbe, in Riser mount for smd component

I’d say that’s a version of a soft termination capacitor. They are used when there’s risk the board is flexed or exposed to mechanical or thermal shocks to prevent cracks in the capacitor (causing it to fail short).

joulethief,

Do you have more information on this? I’m working on a PCB that suffered from a broken ferrite due to flex.

tbe,

They are called soft termination, I’m not sure if that’s available for every component, it came to my attention on ceramic caps. It’s a dedicated feature you can filter components e.g. on Digikey.

hjkl, in I need a new bench power supply

This is an nice review of all four keysight smart bench essentials: goughlui.com/…/roadtest-review-keysight-smart-ben…

MangoPenguin, in I need a new bench power supply
@MangoPenguin@lemmy.blahaj.zone avatar

The other option is a used one off ebay, could probably find an older one from one of the good brands for $100-200.

RagnarokOnline, in I need a new bench power supply

I don’t know anything about electronics, but I’m rooting for you to get your answer from someone out there

Goodman, in Modulating and amplifying signals with (electro)magnets

Wow really cool! Didn’t know that was possible

Nuuskis, in Finally over

With this pace your future will be brighter than sun!

ColKoala, in The first double sided board I made at home :)

Love the idea of using a USB C connector on a double sided board so you can use it with either side up.

PdeT, in Ah, there you are!

Glad to find a new place here!

ishelly404, in I got another oscilloscope from a ham fest.

Nice! Hamfests are great for stuff like this.

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