Patch Cabbage

I have a very strong opinion of switching supplies. I hate them. They work good for computer stuff, which makes them even worse in my opinion. They are dangerous because of high voltages. High voltages on a transistor board are like some of the old tube transistor hybrid boards. Also if you look at the capacitors on the switching supplies you see at first a 25 for voltage level. It's not 25 it's 250. A beginner could make a serious mistake there when working on one for the first time. I once replaced a transformer on a portable tv with a crt with a resistor on a heat sink and a diode. I made sure to insulate everything since high voltage would be present at the junction. It was way lighter and the vertical sync worked just fine. Switching supplies to me are the same kind of circuit only with more parts. Like older circuits where the voltage levels never exceed 25 volts. Switching power supplies are a dangerous design. Also don't get me started on lithium batteries. Anything but lithium because it reacts with water. Hey if you design something, try to make it safe.

This should work.

Look in the device manager and see what drives the computer has. Who knows, one of the cables might have been disconnected. Happens. It would still open and close without the data cable connected. If that doesn't work download a Manjaro iso and iso-usb it to a flash drive. Start it up in manjaro and see if it works there to guarantee a windows 11 software problem.

Though it may seem like attitude it isn't. I'm just different from the people you already know. I was brought up minimalistic with nothing. I was told to learn the things around me in the world. I wasn't given anything. Electronics was one of the harder things to learn about but I learned it. I appreciate the time and effort you went through to look things up. I was told if I don't know something to look it up. There are no libraries with the answers sometimes, even in the reference sections. Libraries near colleges are the best though. Schools were never good to me. Probably genetics though they don't want to admit that. I'm second generation russian. You know, the bad guys. School are a form of govenment spying and indoctrination and making records on all the new people. These are your school records and they stay with you for life along with military records and police records. So from a government standpoint you may be a stupid militant crook or something. With me add commie. Not a commie but argue with schools. Hey looking things up wake up the brain cells it's good for you. You know use it or loose it. It sure beats watching the tube on fox and drinking a beer, which not only damages brain cell but also makes you fat. And finally the circuit I was looking for probably doesn't exist yet. That's why most regulated power supplies use the zener or have a million chips in them. The thing needs a better scientist, something nobel or something. Have a nice one. Bye.

Hey thanks. What book is that? I'm starring at that second diagram. Can it even work. Looks to me like the polarity of the main transistor is backward and can't work. Where is the positive voltage coming from for the positive output. As for power on my circuit it is 30 amps. It is already regulated as it's variable and able to be tuned to the load without a zener constant. I just need to remove the 120 cycle positive ripple. I still need the ripple inverter. And for protection of the circuit it has a fuse before the transformer and a circuit breaker directly after it. The power transistors are fully capable and if not I could always stack some more. As for the base it requires very little current and is not even an issue. RIPPLE REMOVE TRANSISTOR CIRCUIT NEEDED. If you are wondering why I posted here instead of engineering I did it as a cheat, a hack, because in engineering I would get answers like circuits that are already on the market. Needs 9 chips to do it as an example. I needed to ring up some scientists or something to get an effective and simple circuit using the a single transistor. Not a my book says kind of answer to a different question that wasn't even asked. I will maybe try to help you with your homework in the future if you were to ask. What is the name of your trainer book and who is the author. He may have been broke at the time and is an idiot. Studiot, I don't mean to sound like I'm coming down hard, I'm not. This is the simplest of basic circuits. It's like asking if an npn silicon amp or switch circuit is an emitter follower or not and what might the base voltage on be and needing a schematic to understand it. It is one of the simplest of circuits. In theory or use you will need to understand circuits without schematics like some unit without the book or papers. You find the main components and draw at least common circuits from them making a usable schematic. Everyone always asks for a schematic on a linear power supply. Why it just a transformer and a bridge. It can even have a filter section on it and even a choke or resistor. It may also have fuses or circuit breakers and a main switch. But, and big but, it is still a simple( transformer output gets rectified) circuit. Everyone then asks for a diagram. Why do they need a diagram for two moving parts. Is it that hard. It's a linear supply. It has a filter. It has a control. It does not use a zener diode. It still needs a ripple invert circuit to hook up to the control. AND. I won't find it here. Thanks.

I have a linear power supply build that is a variable voltage supply. The circuit I need is for the ripple left over after the filter capacitors. The supply uses power transistors as the output which are controlled through the base voltage with a variable resistor. I want to hook up another transistor to invert the ripple. If I sample the ripple as a control on the base and get the inverted voltage output on it's collector resistor and use an isolation capacitor to the base of the power transistor it will work. The down side is that the ripple will show up varying through the range of voltages and it will be about 43 degrees advance out of phase. So my question is how can I set up my transistor to invert and remove the ripple of 120 cycles evenly across the variable voltage range. Is there an inovative way of doing it or a cheat or something. I know it can be done. I just have not figured out the way to do it. Anyone with any advice?