glibg10b

@glibg10b@lemmy.ml

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glibg10b,

why do some People , type like this

Is it safe to use a laptop charger to power two parallel 24v fans?

I have a 3D printer and have a special filter that has two 24V blower fans that are connected in parallel. Unfortunately my printer doesn’t have the proper connectors for the fans. So if I purchase something like this power jack adapter I know the adapter is 12V not sure if that would make a difference. Anyway if I connect the...

glibg10b,

I’d buy a cheap multimeter and test it for myself

glibg10b,

Run Stable Diffusion locally for infinite images and unrestricted prompts :)

glibg10b,

Isn’t that Rey from the sequels?

Microvawe transformer spotwelder. Is there a way to improve it?

Hi, I have built a microvawe transformer spotwelder, I have put a single turn of welder wire for in the secondary and I’m timing it with arduino. Worth mentioning it was/is a 230V transformer. Electrodes are sharpened copper rods. I believe the voltage is still high. The spotwelds it produces are slightly discolored and not as...

glibg10b,

I believe the voltage is still high

I believe there are devices that can measure such things

glibg10b,

He doesn’t want her to eat much because he’ll be using the rear entrance

glibg10b,

I use the ReVanced version of YouTube Music (no ads, high quality music). If I find a song that I like, I download it in FLAC format from one of the sites in the megathread

glibg10b,

Why not just save the post?

How should I get started?

Hello y’all! I’ve always been interested in computers and programming for as long as i can remember, but recently i’ve decided to try to get into some of the deeper stuff behind that, into the wonderful world of electronics. Where should I start? What courses or books or youtube series should I consume? What are some...

glibg10b,
  • Arduino
  • The Art of Electronics (book)
  • LTspice (simulation software)
glibg10b,

AA batteries are typically non-rechargeable, so there’s not much of a need for putting them in parallel

glibg10b,

The censored words make this unreadable

glibg10b,

You seem to like the lines-of-code metric. There are many lines of GNU code in a typical Linux distribution. You seem to suggest that (more LOC) == (more important). However, I submit to you that raw LOC numbers do not directly correlate with importance. I would suggest that clock cycles spent on code is a better metric. For example, if my system spends 90% of its time executing XFree86 code, XFree86 is probably the single most important collection of code on my system. Even if I loaded ten times as many lines of useless bloatware on my system and I never excuted that bloatware, it certainly isn’t more important code than XFree86. Obviously, this metric isn’t perfect either, but LOC really, really sucks. Please refrain from using it ever again in supporting any argument.

I need a new bench power supply

Hello, I did manage to kill my cheap-ish bench supply causing it to randomly output up to like 300% the set voltage when under load which did already kill one board. Probably I didn’t actively kill it but the chinesium did its job 🤷🏻‍♂️. It was a single output supply, when needed I hooked up additional buck- or...

glibg10b,

Lab equipment does tend to be expensive

glibg10b,

3

glibg10b,

Are you using the BJT to create an AC signal? If so, how?

glibg10b,

SAS

Continuous operation of a general purpose relay?

Hello, I have a circuit that will need to return connected hardware to a default state if power is lost. The hardware can handle continuous voltage, so I’m thinking a simple solution would be to use a battery to provide that fallback power source. To avoid draining the battery, I’d like to connect it through a relay on the...

glibg10b,

With your solution using a diode on each voltage source, would there be any risk of a trickle charge draining the battery unexpectedly if the battery?

Current flows from high to low voltage, but the battery is at a lower voltage than the supply. Check the diode’s datasheet for the reverse current at the voltage that would be across it. It should be negligible

Here’s an example from my notes:

https://lemmy.ml/pictrs/image/97a947f7-a757-49d5-8751-e33194983c87.png

Small fan switch sanity check. (lemmy.world)

Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from here using what I have...

glibg10b,

The maximum ICE is 61.76 mA in the worst case, so I’d say you’re good

glibg10b,

The transistor is a 2N4401. From the datasheet, VBE(sat,max) = 1.2 V and hFE(min) = 20, so it could drive ~60 mA in the worst case

glibg10b,

It essentially turns into a small generator while spinning down

Kind of like an inductor?

glibg10b,

If your soldering iron is sparking, you have a big problem

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