Відео

Light technician here: I hate wall washer lights. For a dinner room, you need 100lux to confirtably see other people faces and what you are eating. Most indoor LED lights today have an efficiency of 60 lumens per watt, which for the living room translates to ~1.7 watt per square meter. That's a blessing in terms of energy consumption. But they are to be installed perpendicular to the surface you want to illuminate. When lighting is indirect, the efficiency drops by ~5 lumens per watt, or less, which translates to ~20 watts per square meter for an illuminance of 100 lux.

"Right up the clacker" you craic me up with your Ausie vernacular Dave

Wow, I just trash picked almost the same one except its not touch screen. Unfortunately, i cant get in dje to the PW. Is there any way to bypass it? Or is it junk now?

My first thought was, "It's Weller, so make sure it's 240V!"

Dave, Relax my friend.

Trust but verify! Haha alrighty Mr. President Reagan 🤣

All circuitry bits cool ...The big take away? The miracle of quality Aluminium extrusion. I'd love a diversion into HOW they force it through a die, and it comes out perfectly straight!! Know anyone with such a factory??

How is flicker on these, especially dimmed. I’ve been finding nasty 60/50 Htx flicker on a lot of led stuff.

I don't want to bloody know so stick that where the sun don't shine, So ner ner naa ner ner 😆......cheers.

No one's used a shoe phone since that Agent Smart incident.

I think it would be relatively easy to make a pick and place machine for arbitrary length LED strip, you'd just need some tooling holes in the strip, and a couple cog wheels to advance it. Might even be able to make it in a continuous process, rather than being fed from wheels.

I watch a lot of political commentary and it seems the same bots are spamming every video I watch now - it started last week. The two I noticed have a crotch shot profile pic (with thong bikini) or butt shot (with same bikini, probably). They all say the same thing - oh you're all wonderful people, such strong women with great insights, blah blah blah. They don't add anything to the conversation, and it's unlikely they're generating any watchers, but whatevs. The spammers probably wrote a program to target every yt video, and now it costs them nothing. Just a small annoyance, I guess.

Abc Stands for Australian Broadcasting Corporation

5.7W approx per meter just to heat the resistors? I've used 12v strips before with the resistors, and the efficiency is questionable. Due to the heat, you have to ensure they are stuck to a metal surface. If you try sticking them to plastic, they can soften the adhesive and fall off and the LED's overheat. A mistake I made when first using strips. For the 12v variety a big mistake is assuming they will be ok for a vehicle (boat) where the 12v can go up to 14.4v - they don't last very long if you do that.

Don't go hacking off the dimming input wires! From your test, it looks like the analog control voltage method gives you a nice flicker free output with a wide dynamic range. Have you done the same tests using a triac dimmer on the AC input? From my experience, even drivers that are rated to handle triac dimming still struggle with visual flicker, poor performance at very low levels and even audible noise. Embrace modern lighting wankery.

Not having > 90 CRI in this day and age suggests that these might be older type less efficient LEDs. 90 and even 95 CRI is starting to be standard for even generic consumer LED strips.

Yeah I’m not a small time engineer, but I stay away from the Diodes brand because they do seem to have a long device life

Among the first humans. Wohooo!

So dim that your hard disk jumped.

That thing sucks.

Here I have dozens of 74 series logic chips with 74 date codes.

Thats subwoofer look cool

I bought an AI multimeter from Aliexpress a year ago and cost me about 30 us dollars. I measure a 1.5 volt used battery and get 1.118 volt from Aliexpress AI multimeter, Fluke 730 meter with 1.119 volt for the same battery. Personally I prefer to use my Aliexpress AI meter more than the Fluke 730 because it is brighter and I do not have to change the function switch such as AC, DC, Current, Capacitance and temperature. The AI function automatic change it for me. The accuracy is almost the same by ,001 volt. The best thing is the cost, 1/4 of my old Fluke meter. Do I care about life time warranty.

Hi. Thank you for the review. I'm very interested to get the tips of what else can be done with this meter when you say it's hackable

The weller needs a few Viagra tablets 😂 Definitely NOT worth the extra price over the other one, and you can always use some soundproofing on it. And for 2 to 3 db less noise it still has a way more irritating pitch noise, sounds like an old hoover/vacuum

We now need a video about IEEE Std 1149.7 which is only a 2-wire interface.

Short design tip video are great! Hope to see more. I like the long, deep diving video too, but always have the time

Its been taken down? Deep State really IS censorship. I cant get to my channel this week. Janzee77

Tried to make this on breadboard and spectacularly failed. Load (12V 1A motor) runs straight after circuit is powered. No reaction on button press. I used 18P06P P-MOSFET and SS8050 NPN BJTs though due to lack of other types here.

These knobs are still advertising on UA-cam

Too much talk, not enough thermal design.

Cool, I have something similar, HP media pc, all in one, now i just have to boot it. Christmas present, many Christmas trees have since passed thru. Working fine when i parked it. A heavy tank just like yours.

I think that caps and resistors are installed because they separate the boards for different models after that "small parts placing machine" and it's cheaper in the production

Priceless: ua-cam.com/video/ln_XJDPKJlc/v-deo.html

@dave you can’t solder batteries with an earthed iron 🤦, that’s why the battery protection kicked in on the battery. 🙂 I use a battery powered iron (ie not mains earthed) or a butane powered iron. 😅

Great video. Thanks.

I DESPISE ground current sensing on bench PSUs!

08:00 man I wish my soldering looked like this, in my case i'd burn everything and the tin would be everywhere

I don't get the jfet circuit. Wouldn't the microphone deliver a small AC signal to the gate that certainly is in cutoff region or does it also have a permanent bias voltage because of the charge?

I have an even older all in one PC that I just used to set up Batocera. Very cheap retro games machine.

VFDs were so beautiful in old handheld games.

All these opinions about audio quality makes me want to listen to my music collection on C-90 cassettes from the 80's. Unfortunately my mint Sony TC-KB920S has a mechanical problem...

I have a Vevor like your old one. This Weller is nice of course, the low noise level and the pedal being the most interesting features. For what iIcan see, it doesn't look like it outperforms the Vevor in term of suction. For me, the soft neck is a big no no. I wish they would add a led on the head for improved lighting on the bench.

I'm wondering if all the trendy humanoid robot companies will suffer a similar fate. They're cool but don't seem financially viable imo. What does Dave think of atlas, digit and such?

The electrons in movement is what generates the field ergo its the electrons that have the energy potential in the first place. Does the field contain the energy? The field is the energy but it could not happen without the electrons in motion ergo the electrons have the energy. Either way this is whole discussion from veritassium is kinda dumb and just using semantics and technicalities to attract views which is the problem with youtubers these days. Rehash something as new and mysterious gain views and make money while actually giving no real knowledge.

I was pleased to see a HP 41C calculator make a cameo in this video, since there's still one on my desk. (But then it turned into a Sharp 😯Sacrilege!) This composite amplifier trick was taught to me by a Hewlett-Packard colleague about 35 years ago. There are excellent op amps today with both precision and a decent amount of bandwidth; back then, one often had to be more clever to achieve one's performance goals. Sometimes it takes frequency-dependent feedback paths to keep everything stable.

130 mm is 13 cm 😅

You can stiffen up the hose by twisting it I’ve and over.

that really sucks 😂

Concerning that carbon dust is comming out the filter. My other carbon hepa filters has the carbon as second stage and hepa as 3rd.