Thanks for this great series! I was working as a BMS Trainee Engineer a few months ago and was working on the battery voltage isolated sensing when I came across this problem. I even searched for 1-to-1 ratio flyback converters but they also didn't seem like the solution. THIS SERIES INSPIRED SO MANY IDEAS.

Could've easily done it with 555 timers. Albeit, this is yet another gems. I really admire your skills and how much easier to contemplate your analogies are.

Thank you for such an elaborate and simple explanation about Isolated Voltage Measurement technique using the Hall Effect!

The life of an electrical engineer “I have to be quite speedy to take measurements; otherwise, everything will start burning and melting.”

I just discovered your channel and your videos are very good! Keep it up! I'm looking forward to more videos

Great video! I thought I had a good understanding of how hall effect current measurement works.

I am so pleased with your candor. “The capacitor clickbaity thing for more subs” is hilarious.

Magnetic measurements also are sensitive to the surrounding magnetic field, so that if you move your device you will see a change in the output offset

16:00 there are matched monolithic transistor pairs like LM394 for this purpose

27:50 according to companies datasheets optocouplers are slow, and even higher end ones do not stand a chance against MEMS inductive coplers. At least for digital couplers like high-speed general purpose ones and purpose built ones for e.g. specific MCU bus

you do have cores with a gap they are called a pice of bent iron it will work even at highrates of changing flux because of the air gap saturation should not happen .

Is it possible to measure current and voltage at the same time using this? I remember there is a (very expensive!) Fluke clamp multimeter that is capable of measuring current and voltage at the same time from its clamp. I don't know if it works for DC, but i really wonder how they pulled that off.

I think at 100 kHz your system starts ringing. Since conductors resist changes in current and you're trying to change the current fairly quickly at 100 kHz. The coil introduces a delay, which means that your feedback circuit corrects for the current too late, either increasing or decreasing the current, depending on the phase shift. Basically, as you already suspected, you probably need a coil with less inductance. Which of course also decreases the sensitivity, so as usual it's a trade-off... Anyway, so what's up with the German flag in the background?!

I have a system with 70 - 120V output at around 40 to 100W - but the frequency (I can vary) is around 10-40 KHz. Load is an incandescent bulb. I need to measure the output power at that frequency (especially around 10 kHz. It looks like your system will work... but what do you think? thanks

👍👍

Inductive current sensing resistors, pfffffff !

The IL300 matched opto is more accurate (about 4x more) and way faster (with fast op-amps, hundreds of kHz could be done) than this hall thing. It must have something about it that the IL300 does worse, otherwise why?