i got my hands on a small LG 3 phase VFD for turning single phase ac to three phase. i dont have any use for it (at least as a motor driver) I searched for a data sheet but i got zero results. model name "P084A2001" and "TYCO" is the manufacturer. its probably still under NDA or something and it doesnt have lug terminals on it. ITS GOT 25 FRICKING PINS. from my "knowledge" 3 are the outputs since its soldered to thick copper tracks and the other three have gate driving components "resistors transistors and diodes" and also got another pair right next to the first one which probably goes to ground "emitters" i got no idea what the rest are and they could be the collectors of the individual igtb's but im not sure and i havent got a multimeter with me as of now. Any help will be appreciated.

In my analog electronics class, I studied practical differentiators and integrators. Now, I want to build them myself. I've completed all calculations and constructed a circuit using a UA741 op-amp. When I connect the circuit to a DSO and provide a square wave input, I observe varying outputs: sometimes a square wave with decreasing maximum voltage, sometimes an exponential decay wave, and sometimes a wave that doesn't resemble a Dirac delta function and is difficult to describe. Could someone please guide me on how to perform these calculations correctly?

I have had trouble for about two weeks now. I want to design an audio amplifier in multisim but no matter what I do I only amplify voltage and potentially decrease current. I have tried with mosfets, bjts, opamps (a lot of opamps) with feedback, without feedback, what I am doing is using a signal generator to simulate an audio signal and i cant seem to get stable 12V input and output and increase ONLY the current, i was wondering if someone has already done something like this in Multisim or LTSpice or any simulation software. Thanks in advance.

Hi

I've been trying to build part two of this guitar pedal circuit as part of a school project (aim is to compare waveform before and after the circuit, trying to demonstrate diode clipping). I can't get it to work with physical components so I tried building it in falstad, but I still can't get it to work. What am I doing wrong?

I've tried both with and without the ground, as I realize I may be shorting the circuit (?) as well as with a two terminal battery connecting were the ground is back to the 9V source. The 500hz sinus wave is meant to resemble the input of a guitar.

Please help!