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Fuck all those shitdesigns that interface with their LCD using flat graphite cables!
USE FUCKING COPPER WIRES ALREADY!!! At least those things can take a small fucking tug of gravity during disassembly, unlike that micron-thick graphite junk which fractures even more easily than my goddamn toe did!!!
And as mentioned on Hackaday (https://hackaday.com/2012/09/...), repairing it is hell. How much does it cost to make a decent copper wire.. I can buy those things for like 20 cents from AliExpress, so don't tell me motherfuckturer that you can't. And these copper ribbon wires last on ya, AND can be repaired with a simple soldering job. Unlike this FUCKING GARBAGE!!!7 -
Yet another rant about crappy electronic designs.
Just now I was cleaning my desk and stumbled upon some old hard drive in a caddy that I still had laying around.. I figured, let's plug it in and see whether the drive still works. And to some extent, it does! Except that every few minutes it craps out on me. And after disassembling the caddy, I think that I know why.
Just as background information, hard drives work at 12V and generally require about 10W to spin their motor. Meanwhile USB operates at 5V. So a boost converter needs to be present in the controller to step up the voltage and power the drive.
Now what's a boost converter? It's an inductor, a capacitor, a transistor and a diode in a specific arrangement (if you're interested in the design, check out https://youtube.com/watch/...), along with feedback circuitry to stabilize output voltage. Now that transistor is important.. it switches at very high frequency, and its rise and fall times create heat. In the particular transistor used in that controller, it apparently causes the transistor to operate at 65-68°C. That's quite toasty IMO, and overheating may be why the controller is so unstable. But the Chinese manufacturers thought that it's just fine and okay to be sold without heatsink or some research into transistors with better rise and fall times.
So the hard drive craps out on me and yet again it's because of certified shitdesigns. MOTHERFUCKTURERS!!!!27 -
Just disassembled 2 €5 desk fans because they were shit.. and so is their design apparently.
What I found inside was actually surprisingly simple.. a toddler could build it. It's just a DC motor, a 3PDT switch, DC barrel connector, some wires and screws to hold stuff in place. Oh and the plastic thingie with the fan blades, as well as the USB cable of course.
5 fucking euros. The combined cost of the components would be less than 3, certified motherfuckturers. Time to build it, injection moulding, transportation, sure.. but still.
And if you think that being salty about €5 is cheap shittalk, expand that to every fucking piece of electronics that doesn't cost a small fortune.. at all price ranges. Could be radios, alarm clocks, heck even phones. Shit's way too expensive for what it's worth. Perhaps because so many people in the industry are just here for a quick buck.. motherfuckers 😒
Anyway, back to the design.. the hole in the fan blade thingie is supposed to get the motor's shaft shafted in, to turn the blades. I'd use glue there.. but not these designers. They just shove it in and hope that friction takes care of everything. And one of the fan blade modules' hole was so wide that inserting the motor is like throwing a sausage down the hallway. No contact at all! Make it tight already like the Chinese designer's glory-...
Nah let's not get into Chinese tightness just yet.
Oh and also a resistor for slow mode. Consumes just as much power except the fan turns slower. Because fuck efficiency, right?
Goddammit, next time I'm just gonna build my own again.. at least that wouldn't be a certified piece of shit 😑
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I've just found out that the Chinese can even fuck up the most basic of manufacturing processes. A goddamn fucking perfboard, why on Earth would that need good adhesive with decent mechanical strength, right?!!
Initially I was told by other electronics chaps that the adhesive under the pads melts because I'm soldering at such a high temperature (470°C). Well I thought at the time that these boards are really shitty and their adhesive is garbage, and now that I've even seen a cold pad just rip off cleanly, I guess it's confirmed. That adhesive IS fucking garbage and that temperature on the iron is really just fine.
Well, I guess that I'll just design my own PCB's then, and hope that JLCPCB isn't even more Chinesium shit. Because honestly I'm pretty fucking sick of it.4
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