How come you used a 5W resistor for the current sense? If you get a short circuit on the output it will far exceed this anyway until current limiting drops the voltage to basically zero. If you have any load attached, the power should be dissipated in the load unless the load itself has a tiny resistance, in which case you're again dropping up to 12v across basically a short circuit (current limiting should again turn this off). Building my own power supply as a project and decided to heavily base it off this design as it ticks the same boxes as I wanted (except I will be working with a 2A limit). Just curious as to why you chose 5W as opposed to either ~12W to match the short circuit rating your supply could output or a standard 1W or less resistor since current limiting will handle shorts anyway. Would love your thoughts, cheers

Most of these circuits are incapable of handling a decent load while keeping the sine wave intact. In those cases I usually just run a square wave into a transformer. On the secondary you will have your sine wave.

very nice explanation, simple and clear oration. This is my first video, but then I want to subscribe :-)

the idea to use BJTs won't work for negative voltage, since the BJTs only pass current in one direction.

Can we use Atmega 328p instead of Atmega 8 as a programmer unit?

11:08 so you're telling me that there is a class A pre-amplifier inside a class D amplifier?

Thanks for the info!

why you used colpitts circuit with crystal!? I think any common emitter amplifier works just fine without shifting the crystal frequency

If you did a tutorial series on the siglent oscilloscope, I would definitely watch it.

Hi @SineLab, your tutorials are always great, and I always learn something new from them! I have a question: for adaptive current control based on torque (low torque = low current, high torque = high current) using MOSFETs, should we implement it using feedback from the shunt resistors or the back-EMF of the coils? Can you answer in one or two lines?

Thanks! I enjoyed the detailed screenshots of the scope and schematics so I could follow along at home with my own equipment. Also, may I suggest you add links (cards) in KZbin Studio so they link to other videos you made as you talk about them (e.g. "Ultimate Guide to Transistors"). Is the schematic at 3:07 correct? I built this and put in a 50khz signal, and all I'm getting is a lower amplitude sine wave with a bit of distortion on the downward slope (a "bump"). Very simple circuit, and I've checked all my values and pinouts numerous times. One thing is I'm not clear at what point is the output of the sine wave?

Just an appreciation comment: Thank you SO SO much. You are very good at explaining/teaching.

Thanks!

Thanks

Hmm... For Q7-Q10, Q14 and maybe Q11-Q12, I'd have probably used a 74xx4066 rather than all those 2N7002's. One SOIC-14 is an easier soldering job than eight SOT-26's, and those transistors are all right next to one another in the circuit. (Didn't go through the schematic in detail to look for other things like that.) Did it really simplify your layout that much to use all those 74LVC1G04 rather than six-packs? If you have only a few components on the back side of the board, you can use paste with a lower melting point and reflow with hot air. Easier than hand soldering, at least with my shaky hands. I've built a few mirrors recently with DMMT5401 matched pairs. They seem to work pretty well, but I don't have your measurement tools. The biggest single takeaway from this video is that analog IC's (and ADC's and DAC's) are amazing things that you are never going to replicate properly with discrete components. But it's fun to try - and important to learn what's going on inside those prepackaged miracles.

Is this code compatible with Arduino Nano?

Can i use the default 1 amp charge without having my 3.7v 3 amps lipo battery exploding?

Another solution for programming pic microcontrolers is the Great Cow Basic IDE completely free and open source.

Microchip makes excellent parts, but their software is awful bloatware.

So we need sine wave to make it work

Fantastic information, well done

These are very nifty chips. For much more user friendly programming platform I opted for PickAxe myself.

For those that enjoy tube/valves Electronics, can you tell us is there a Circuits simulator that simulates circuit integrity as well draw the circuit pathways directly to a PCB file?

Great video! The most complete video for bjt in any amplifier. For someone interested in audio, you should watch this over and over until it makes sense. This condenses months of working on amplifiers into a few weeks with studying anything you don’t know in the video. I wish this was available when I first got into amplifiers and electronics. Thanks for taking the time to teach others.

Thank you so much for the video! Amazingly clear and instructive.

Certainly the best tutorial I've seen in a long time, thanks a lot for this awesome video. Looking forward to your upcoming videos. By anychance do you have a discord server?

in modern silicon processes, transistors are so small they are essentially free. Resistors on the other hand, can take up lots of space so replacing a resistor stage with a diff pair stage is very worth while. matching is also easier to accomplish with inter-digitated fets

4:13 you don't need the 10K resistor in the feedback on the TL074 o derivatives.

Why don't you use Philips discrete class d schematic?

Mate, with soldering skills like that, just get the PCBs assembled at JLCPCB!

Thank you for the excellent video, can you please explain the mathematics behind the current mirror, how do you get to 1mA? once again thank you!!

Thank you

CubeMX generates all of this.

do voltimeters and multimeters use this to get the effective infinite resistance they would need to not interract with the circuit in a significant way when measuring tension?

Great video. I m new to electronics and I m wondering can you amplify the dc input 24v to 40v using dc boost converter without making significant noise in the output?

What do you think about ATMEGA16-16PU which is big enough for easy handling / soldering and in 2.54mm standard. Yes, it's way bigger than the proposed chip but way easy to solder or sit on a breadboard.

At 6:18 you said Vo/Vin= Z1/(Z1+Z2), I believe you wanted to say Vo/Vin= Z2/(Z1+Z2)

would love a pdf for self making the pcb. or a gerber file :) LM338T swappable?

It’s better to try assembling a microwave ADC using discrete elements. Because they are actually almost unavailable for purchase. I would like to build a homemade oscilloscope.

What’s wrong with a ladder DAC though? If the resistors are accurate enough, it seems like the simplest and most elegant solution.

Tried using low pass filters to get sine out of a 555 square pwm, none worked. Spike sines top and bottom. Even repeating the circuit in falstad, same results. Power supply from a battery.

Just ask your wife for a number. It will be very random.

No comparison of off the shelf and diy on same screen? Sad. 😢

Please note that PSpice for TI is obviously a cut down offering of the commercial product. The commercial product gives you more advanced analysis such as Smoke analysis that tells you what components have been overstessed by over voltage over current etc

the most part of adding usb to your project, is to have an application or a driver to communicate with your device. Keyboard?! not that interesting. I hope you do it in future videos.

Well, amazing effort, but how it sound?

Shoud've done R2R honestly. R2R is superior AND simpler than your contraption at the same time.

This video should have a big red warning at the beggininig of it indicating that it is for rather advanced users, otherwise you might get an aneurysm.... ¬¬ Good content, BTW

could you have a couple of micro adjustable resistors on the inner string - you'd only need 4 perhaps even 2 to tweak the values there to bring them into linearity

Wow, Very cool! DACs rule!