Power Supply for Home lab?

The Main reason folks build there own is first and formost for the experiance  (Kinda New EE 101) , it can teach you a whole load about electronics, OpAmps, Power Transistors, Feedback, Transient Response, Voltage References, Temperature stability to name just a few and at the end of it you have something usefull

The second reason is because you have a few of the expensive parts laying arround already and there just the ticket to build a PSU on a budget, Im talking about perhaps a transformer from an old AMP, got a box to put it in, have an LCD or LED display to show the volts and amps (Or an analogue one) etc. Then the cost is minimal for the rest and you still get the benefit of learning and something usefull

If the reason you need one is purly professional / Must have one for the hobby but are an experianced EE then yes, often much cheaper to simply buy one, albeit low end.

My series on building one is aimed at the folks wanting to learn and gain the experiance, and now im going to extend this to making it fully programable, even remotly so it will potentially be comparable with ones exceeding many hundreds of dollars.

Peter

You can't go wrong with an LM317 operating in Linear regulation mode!

Making its voltage programmable is as simple as incorporating a I2C/SPI/Serial controlled resistor.

Both QEIIs are World renowned wave motion experts.

One QEII has no power and only reigns.

It looks like eash one is about 60$ odd, plus a fee for certificate. I did not look too hard but could not see where it was free, If I can do it for free I would consider running through it for fun

Regards

Peter

To Peter: It is FREE. when you forgo Certification.  Just enroll yourself, if it asks for Credit Card Info, just close the Browser Window. Hope to be able to bounce Ideas off of you when the Course starts.

-USCDADNYC

I enrolled and ended up totally flattened like a pizza!

It certified me as a Looney!

I added it to my watch list but htere seems to be no future date at this point in time

Login to your login at www.coursera.org

-Enrollments

-My courses

-Intro to Power Electronics

-View Course

"Start Date: Jan 25, 2016"

-USCDADNYC

this is what I see and the dropdown under sessions only shows future sessions and adds me to a wait list. is it possible it does not like me being in Canada or the course is full ??

IDK (I Don't Know) why you got the Screen-Shot that you did.Of course you DID create yourself a Login at the www.coursera.edu, Right? That screen of yours was what I got prior to when offered the again [25JAN16]  AAR there are work-arounds if you do Not want Certification. Get or give me (your) Gmail ID, sent to elyee000@gmail.com IDK whether Canada (or outside USA) IP addresses are singled out? I do not think so, but anything is possible.

To Compact:

You were able to get registered at coursera.edu for the "Intro to Power Electronics" course, Correct? B/C Peter Oakes is/had problems w/ registration. He is I believe is in Canada, while you are in  NZ, correct? AAR in that screen Shot, he posted [17JAN16 923PM] on the Left side of the Photograph are two Receptacles (1-Red, 1-Blk) They are Female receptacles that can accommodate "Banana Plugs". Remember our discussion about Bananas?

To Compact:

You were able to get registered at coursera.edu for the "Intro to Power Electronics" course, Correct? B/C Peter Oakes is/had problems w/ registration. He is I believe is in Canada, while you are in  NZ, correct? AAR in that screen Shot, he posted [17JAN16 923PM] on the Left side of the Photograph are two Receptacles (1-Red, 1-Blk) They are Female receptacles that can accommodate "Banana Plugs". Remember our discussion about Bananas?

Hi USCDADNYC!

I haven't registered for the Power Electronics course.

However I use to design and build various types switch mode and linear power supplies and seen the vast improvements to them over the years.

A popular modern style of SMPS is the flyback converter. I've seen it used for many wall warts.

I'm not from NZ but have spent time there many decades ago. I am transient. One moment it is here and the next elsewhere!

Dark Matter is for Macho Wimps who want to verify the existence of Axions, Super Symmetry and other cockamamie ideas!

I wonder how close they are? Cold, Warm or Very Hot (or have not temperature at all!).

I'll see what I can kludge up for a Dark Energy converter.

It would not surprise me that the universal background microwave radiation is related.

Q: What do you call a power supply that can provide an unlimited range of voltages?

A: Omnipotent!

Positive feedback gives you great rhythm!

Very Compact

NOTE: SAFETY FIRST - MAKE SURE YOU USE THE PROPER PRECAUTIONS WHEN DEALING WITH POWER.

Safety equipment such as Isolation transformers should be used where necessary.

Peter Oakes wrote>>.. it wont let me do it a second time..

ELY Reply>>B/C of a earlier attempt at this particular course (a few years ago)? That Would Be a coincidence! USCDADNYC is the Poster Child for NOT completing Courses (albeit NOT for Certification), and USCDADNYC does not remember being hindered by coursera?

AAR if you forego the certificate and ability to pose direct Q's to the Instructors, there is a way for you to view the Course Videos.

Again refer to my 18JAN26 3:14PM Post and send me the info I requested. To this end, I have other two Q's 1) are you familiar/use w/ Google Drive? 2) Are you familiar/use w/ DropBox?

-USCDADNYC

To DAB:

DAB wrote>>...

My theory only uses algebra, trigonometry and two basic forces.

I doubt that any course on Quantum Mechanics will provide you with an understanding of the science involved.

Your basic 1972 physics book will provide you will the fundamental issues.  QM arose from some scientist attempt to fit their ideas into a model.  Unfortunately, their math does not work.

ELY reply>>Those are BOLD Words my friend, "...their math does not work..." Like in the Movie "Pulp Fiction" where the Travolta character said the same words to a Drug Dealer who boasted about his Product (certain type of Cannabis). AAR as I understand it, Classical (Mechanics) Physics fails at the small scales involved. Instead of defining a particle as being in Places, QM describes the Particle in Time. Fourier Series, Fourier Transforms leading to the Schrodinger Equation. As an undergrad EE, I used Fourier Analysis, so for ME, application of it to QM is NOT far a Stretch. Perhaps, I will continue w/ that QM course at coursera.org. They (the professors) promised in their Intro Lecture that they will show that QM "works" as predicted in Observed Phenomenon. If this bears out (by the Professors in the QM Course), you will have a Question(s), Postulated Theory (of the workings), Observable Results. That works for me, I do not know about you.

Astrologers work from observations too.

Are they accurate?

My power supply is accurate when I watch it but if I don't will it suddenly apparate to two different locations.

It begs the question - "Does QM rely upon Harry Potter magic?"

Does JK Rowling know something we don't?

I like Linear Technology and Wurth Elektronik magic.

A Linear Tech IC with a Wurth Inductor plus a few bits equals a great power supply!

Wurth's Trilogy of Magnetics Design Guide is a fantastic textbook.

I highly recommend it!

Banana!

Well I spent many years as a calibration engineer in a standards lab and the only thing we absolutly guaranteed was the accuracy at the time of test, after that we can only hope based on previous experiance

And we all know the old fact that making an observation changes the thing we are observing and this is very true of electronics

Even a good DMM will affect the real voltage in a circuit, and the higher the impedence of that circuit the more it will be affected (10Mohm in parallel with whatever and a few pf in parallel with whatever) as the ratio of current drawn to make the measurement is more relative to the measured circuit...

To All: Could I get a count on who is going to/want-to be participating in the www.coursera.org "Intro to Power Electronics " Course? Then, we can move this Discussion Thread back on-track. All these collateral discussions (while nice to pass the time) are Theories/Postulations w/ or w/o adequate Foundation. We can debate these adinfinitum, but where would it get us?  I went to college to study Engineering. I joined this Discussion Thread to talk Electronics.

USCDADNYC (NYC, USA)

To Compact:

That book:Wurth's Trilogy of Magnetics Design Guide is pretty interesting. Unfortunately Limitations of both time/finances compel me towards towards other Free/discount S/W. More Bang for the Buck. And w/ application(s) across many STEM disciplines. Why walk when you can Ride?

I am talking 1) Wolfram Mathematica that comes (free?) w/ latest RaspPi Debian O/S. IDK the restrictions (if any), 2) That Element14/Matlab s/w discount (I think $100), fortunately I have an .edu email suffix, which usually gets me a Student Discount. If it is for Free. It is for Me.

USCDADNYC (NY NY USA)

Yes, my claim is bold.

The research I have conducted continually finds evidence that QM fails in most of its attempted implementation.

Case in point is the Heisenberg uncertainty issue.  My interpretation of his results supports my idea that there are no electron particles and that the electron cloud around all atoms is a collection of captured photons.

I am very confident that my use of a single elemental particle and two well known and documented forces can account for everything in the universe.

QM with all its complexity fails to do so.

Just a thought.

DAB