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I was wondering how you did it. 🤗

😊 Almost as 'romantic' as the steam engine. 😅😅🤗👍👍👍

Really cool project and looks amazing! The setPixelColor tree is hurting my eyes tho 🫣

I have one of those AIO pump and it came already making a clacking noise, i guess it is about the rotor hitting the stator case. Thickening the water with oil helped a bit but I'm still searching to solving it definitely

Yet another example showing how invaluable an oscilloscope is for generating understanding. Thanks for that

The scope signal is inverted, only thought about that afterwards. So the flat line areas is where the led is on permanently and the pwm is where it gets dimmed.

Awesome video! I didn't know you had a channel. I just subscribed. Really enjoy all the detail you get into. I have to go back and go through your catalog of videos!

Thanks for sharing . Could you at, some stage, repeat the experiment for a capacitor ?

Really found that interesting .Charles Kettering in the USA produced the first successful automotive self starter more than 100 years ago . He was the first to realise that the motor did not need to be continuously rated for the power it delivered . The motor is a series motor with brushes .exactly as you just showed us

That Variac you have is fantastic, a dive into the ins and outs of the Variac like what’s being is it a toroidal transformer just something things to put in a future video if you see fit to film one Continued Success Fabrizio

This is living proof that an ounce of short practical experiment is better than a ton of theoretical waffle Not only did you show the poor result , but by measurement you showed us why .Thanks for that

Great video Duncan, but are you diving into Johnny Depp, if possible change title to deep, otherwise everything fantastic especially your oscilloscope, is that an oscilloscope and a tester as well, great setup you have Duncan, and interesting explanations about inducters other circuit explanations thank you Continued Success Fabrizio

Very interesting , I've learnt a lot . Thanks for going to the trouble to show us this . Always nice when theory and practice come together .

When it comes to reactive components , inductances don't like having their current changed and react by changing their terminal voltage in an effort to keep the current constant . Capacitors don't like their voltage to be changed and react by drawing current in an effort to keep their terminal voltage constant . Thanks for showing this so clearly .

Hello, this happens to be the first video of yours that I've watched. Interesting and clear explanation of the some of the implications of power factors. Noting that you have also done hundreds of podcasts and videos, I'd like to say thank you for putting in such long-running effort for the benefit of others. (And I'm also surprised I've not come across your work before.) If you don't mind, I offer one constructive criticism. Although you have accomplished the intention of such a demonstration, please consider what is missing if someone wants to replicate your experiment. This is an issue I've noticed among many DIY or educational presentations. Certainly, it would be a bit silly to list "blender" as one of the items needed. But what about the transformer? And certainly the DIN-rail mountable VSD needs at least a part number shown (turn the unit on its side?). Just from a cursory glance from the list of your other videos, it's clear you've used the VSD at least several times before and perhaps have identified it previously. However, consider my first encounter as an instance of a viewer just jumping into the middle, thus skipping the requisite prior context. It would be a simple matter of copy and paste to replicate the parts list from previous videos. It's hard to explain why that is a real time saver for people like me. I want to dig right in, not go hunting through other videos looking for the gadget in question. Ideally, include links to where to buy the items in the description section. I also *prefer* to purchase things that are set up as so-called "affiliate links" to support in a small way a presenter's efforts. Back to the VSD a moment. Granted, that device is a sophisticated model having an ethernet connector and what appears to be a 12 pin interface port as well. It certainly isn't a cheap piece of kit. That said, you never know who might be inspired by one of your presentations, becoming enthused to follow up even if it takes some time to save up and purchase such a device. Looking forward to watching more of your work. Cheers, H in Florida, USA (waiting for a monster hurricane to blow by ...)

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I wonder if there is a difference in pressure when you do this. I wan to make an aquarium pump connected to an ESP32 and plug it into a pneumatic toilet flush controller. That way I can use IR wave sensors to flush the toilet.

What brand is the VFD ?

I remember years ago that a customer used normally closed contacts on the motor start contactor to connect large value AC capacitors to the motor terminals when the contactor dropped out . The motor was required to stop as quickly as possible and the system did not utilise a VSD . I realise now that the capacitors could not absorb power , but the circulating current heated the rotor bars to absorb the system inertia

Interesting 🙏

Thanks for that . Do you know what the Coefficient Of Performance (COP) for these small systems is ? Does it pump more heat than the power consumed by the compressor ?

Effaçeur ¢ompul$if déte¢té.

gotta look into reflected impedances. your "workpiece" is a single turn secondary. the coil a primary of "x turns". secondary resistane reflects at the square of turns ratio. using that you can figure out the impedance of the work, and design the coil to operate at determined power levels... stay within component ratings... need a pretty high frequency for thin material, skin effect nonsense... and, dont run long thin wires. you want the feeder to be as capacitive as possible, ie, thin plates/ribbon with insulator clamped between. try to keep the inductor and magnetic fields constrained where it matters... around the workpiece. would get much better results with that adhesive copper "slug barrier" tape, rather than a pancake.

with that small coil you can heat that screwdriver to red-hot.

My mug is ceramic, so my thought would be to make an induction heater pad and put a piece of steel over it with a weight sensor to put a bit more energy as the weight increases. I could tare it with an empty mug, so presumably it would turn off without any coffee and the less coffee there is, the less heat.

That was fun and interesting and cheap , I think . Thanks for sharing. Physics is physics !

are you south african

Brilliant, thank you

Hi, it would be quite interesting if you could lower the amount of turns on the output coil to see what happens to the frequency shift. I believe there is ten turns on the coil you have. Try 6 turns and 4 turns. All the best from the UK.

Had one of these for around 55 years. Mine is not as shiny as yours.

I really enjoyed this one Uncle D, thanks a lot. 🙏

Will it only heat ferrous metals . What about non-ferrous metals like aluminium , brass and copper ? Thanks for sharing

That is a great explanation. Living proof that , without an oscilloscope , we don't really know what is going on Thanks for sharing

man i admire the organization, i would love to have tools in a box so well put- keep it up man i love it

I'm astonished at what can be achieved with such a simple circuit . Thanks for sharing . capacitance meters are a dime a dozen , but inductance meters appear to be rare and expensive

Nice !!!

You helped a lot! I have the same issue same chip blown. Can you give the link to the compunent?

Nice video

Hi Duncan I wonder if you can help me. I have an outdoor weather station with an inbuilt temp/humidity sensor that went off line a while ago. Other parts of the weather report ok to the console like wind speed and direction etc. The original temp/humid sensor looked like it had corrosion on it so attempted replacement. The sensor pcb had part number EW105DV1. I replaced it with an AHT10 temp/humid sensor. Both have connections for Vin, GND, SCL, SDA which I think I connected right, but still getting temp and humidity from my outdoor weather station as off line. Other units are ok. Any ideas? Are these sensors compatible? Thanks mate.

Interesting, thank you. But as always, the trip down memory lane... Remember the colomn shift gearshifts? 🤗

I appreciate the general principles you showed us . All sorts of useful stuff here . Thanks

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Nice, thank you.

I think the switch mode converter is far more efficient , so nearly 3 times as more current would be available from 3.3 volts when powered off 9V

Isn't the 6v problematic?

Does steam power a train or does oil power a train?

I've tried to explain this to EV lovers. Ships are vastly more efficient than cars and trucks, yet there are no electric powered ships crossing the Pacific, or even moving from the Persian Gulf to Europe. If EVs were the least bit decent, they should all be electric, all the shipping. And none of it is. Maybe there's a handful of ferries across the globe, but if electricity is a decent replacement for fossil fuels in cars and trucks, the oceans should be covered in electric cargo ships.

This shows how one has misconceptions about common ideas .Thanks for sharing

Interesting, thanks Uncle D.

Eish no safety belt 😃 I do like the pair of dice hanging off the rear view mirror. 👌 Authentic 👌