Yes please. You could look at plasma speaker circuits, with a 555 timer. You could test if those work better tham yours. Or you could look at some fm/ am shortwave radio transmitters. You could compare transmitters with a LC circuit or a cristal osccilator. Thanks for the vid, it whas great!
@@greatscottlab can you test a popular FM radio transmitter circuit on 1 or 2 transistors? (or receiver there are a lot of shemes for them) i built like 3 of them and none is working, and i don't know that do i do som ething wrong or is it just scheme bad
What is a good simulator to find that simulates in a lifelike manner? Have a lot ot issues when i mix high power with sensitive stuff like micro's and analog
Don't forget to understand how the different elements in your circuit work and how they interact. This is probably the most important thing if designing your own instead of building an already-designed circuit. For instance, you can connect an LED to a battery and have it light, but if you don't understand the IV curve of LEDs your circuit will be very unreliable.
Worked almost 2 years on a automotive 12V to 230Vrms power inverter (modified sine wave output), with start/stop support. It definitely is not as easy as people on the internet make it seem. Majority of the cheaper inverters on the market are modified sine wave, which has an issue of high inrush current at the AC output due to the square wave nature of the voltage. Pure sine wave inverters require a lot more design work and complexity but somewhat solves this issue. After working the project for such a long time, I had to add in a secondary voltage stabilizer, such that the input voltage will not affect the AC output. The feedback you mentioned is critical in maintaining correct RMS output voltage, along with the frequency. I ended up also adding a constant current mode controller on the secondary side to help bring up capacitive loads (such as common chargers we find now a days).
This sort of format is especially educational. Every hobbyist looks for schematics online and pointing out the little traps and gotchas is extremely important.
I don't know as much about electronics as you do, but when we both read "astable multi vibrator produces a near sinusoidal waveform" I must admit I laughed.
@@greatscottlab and please do include circuits that do work safely. Because the outcome of this video is that nobody watching will build it! This video is kind of BigClive video: not for building things but for understanding... but I guess it depends on your goals, whether you want to imitate BigClive or provide circruits that viewers can reproduce.
I will eagerly waiting to see you next time... I have subscribed you from last 4 - 5 years. Thank you so much for sharing knowledge... It helps always...
Dude!! exactly 2 weeks ago I made this deal, it worked to 120v for about 2 minutes!!, and like you said, the heat changes/kills things on this and BOOM Rico, it killed the 2 transistors. I might still build it again but with mosfets. Yes I got obsessed, and found a forum with over 60 pages of comments from the last decade, they got obsessed too!, it's the apparent symmetry of the circuits!
Hey Scott! You could make more videos of random circuits found on internet. And then maybe in same or other video address all the flaws and drawbacks to make a more or less perfectly working circuit. That would really help people understanding what is wrong and what is write way to do things. Love your videos❤.
maaan... i was really hopping you would add a feedback circuit and fix everything...almost... a great one... for years i'm putting off making one... now i know i did good... but would still love to see you build one that is actually good... keep it upp love your videos
There are so many circuits on you tube and the internet about changing voltagelike buck boost and variable voltage circuits. But none of them mention the voltage under load or about the current variations. That makes thosse simple variable V controllers like tose with lm317 etc to break down under load and in real conditions. Would you kindly enlighten hobbyists like me about such circuits? You seem tomake dependable circuits and your explanations are thorough and undertandable. Thanks for your contributions and kindly continue to do so.
"So let's hook up an oscilloscope and see that sinusoidal waveform" (S I L E N C E) (ANGRILY SCRIBBLES OVER WHAT HE JUST READ) this was pure comedy. Thanks Scott
If you want a minimal oscillator, here are two: 1. Connect a relay to itself such that it turns itself off when it is on and vice-versa. Put a capacitor across its coil to slow the oscillations down. 2. Program an Arduino. If I wanted an inverter I'd use an Arduino's to drive a MOSFET to energise the primary coils following a sine wave via PWM and maybe an LC to filter out the fundamental. Might need a MOSFET driver if the frequency is high enough.
0:40 i remember that, i was made inverter basic on that scheme for my elementary school project, 2n3055 i called that transistor jengkol on my country.
Plz test the circuit of cellphone jammer which have used bf494 transistor . I know 494 frequency is not enough for jamming modern phone but i wanna know if this circuit works or not ?
I feel like it would be really interesting to see people test different waveforms on different electronics to see how they would react. That unusual waveform towards the end made me really curious
The circuit is called astable multivibrator and is the first basic oscillator that is teached in electronics school class and has fixed frequency and duty cycle output.It can not be used for powerful demanding applications circuits and is impossible to have any feedback sensing.The output is always a square pulse.
I've had a person argue with me that a RaspberryPi 240Vac relay add-on card he was demonstrating did not need an insulator sheet because there were no mains voltages present that could damage the Pi. The mains relays were through hole parts with exposed 240Vac pins.
