Strange

What do you think is strange?

Yes, they are in series.

Ooh wait I'm an idiot. The total voltage is 4 volts from battery and LEDs are 4 volts. I was thinking the voltage was different oops

Select an led and turn on the "eye" and observe the frequency of current flow. Pretty high, eh?

@wyoelk, that’s just a simulator ‘bug’. In real life it wouldn’t be there. I’d like to see a current limiting resistor in the circuit though.

@j5892000, we all get confused 🤷‍♂️ at times.

Due to the internal capacitance and resistance of batteries it does occur in real circuits especially with the poor manufacturing of batteries. The problem is the single ground for the simulator. Hooking this to an actual oscilloscope you would connect to both negative terminals negating the issue. If you only hook to one it would read the oscillations.

That is incorrect. Firstly, battery manufacturing has improved immeasurably over many years and that’s why we have all the battery powered devices we enjoy hour after hour and, indeed, the electric car. The technology and materials and manufacturing make this possible. Secondly, you seem a little confused if you don’t mind me saying. You start by blaming the battery capacitance, internal resistance and manufacturing but then say the problem is with the simulator ground. Which is it? Thirdly, I think you are saying to connect the oscilloscope ground to both battery negatives? If that’s what you mean then it’s wrong. Try putting the two batteries directly in series at the left hand side of circuit or simply replace one with a short circuit, then increase other battery to 4V. Same circuit functionality and same oscillations on oscilloscope. Therefore nothing to do with number of grounds, simply a simulator-caused effect.

school is in session and i have yet to pay for it. i love free lesions. now why the current limiting resistor in the sim ? nothing is blowing uo and i dont think ill get thermal run away.... wouldnt that be a neat feature to add in the sim. it would help with real world learning . also how about batteries that have amp hr ratings. like a graphic in the empy space inside the battery icon that slowly lowers as its being drained to mimic real world better. im just thinking

Hi @j5892000, if you take real life LED’s you’ll find the working voltage will vary from one to another, within certain limits which you’d find from a data sheet. Also, you have chosen an exact 2V supply to match the nominal 2V of EC LED’s. Try finding that from a real life battery. Temperature can affect the LED junction - but I think you get the idea. If you add a current limiting resistor you avoid blowing up the LED.

EC improvements move very, very slowly as you’ll see from the update history. There have been many requests for additional components and functionality over many years, most of which have not been implemented. However, some have! Fingers crossed more will follow soon - but don’t hold your breath.

Yes battery manufacturing has greatly improved. Next I mean a real world scope. EC scope has limitations no doubt. Not blaming but in this configuration IRL there would still be oscillations due to the batteries makeup. Sorry if I didn't separate what I meant between real and EC

I spent my life using ‘real’ scopes Techtroxix, Gould, Hewlett Packard and others from low cost to high end. You are suggesting a battery and diode produces this waveform. I think that’s nonsense but I appreciate you are entitled to your opinion.

A battery can be considered a huge capacitor having a bit of internal resistance. How do you suppose we get 1.2THz from such a combination?

Shake it REALLY fast

Said nothing about the diode. Oscillations have occurred for decades without diodes. Power supply, resistance and capacitance irrelevant of the ability to measure current can create oscillations. Engineers do it on paper/calculators all the time. Obviously the developers of EC didn't create any limits with certain configurations. See this circuit for example. _ _ https://everycircuit.com/circuit/5121878736502784

See this circuit for example. _ _ https://everycircuit.com/circuit/5121878736502784 Is it possible to be actually a -36,000° at 36GV at 10Ghz? On paper only.

@wyoelk, what you are saying doesn’t make any sense. Let’s end it here.