tag:blogger.com,1999:blog-7057630065429233264.post889277792448498361..comments2024-03-28T10:51:44.181+01:00Comments on Paul's DIY electronics blog: My New Power Supply Design Project Part 4paulvhttp://www.blogger.com/profile/11421488581167758443noreply@blogger.comBlogger39125tag:blogger.com,1999:blog-7057630065429233264.post-86491414348150840662022-08-03T08:45:26.865+02:002022-08-03T08:45:26.865+02:00Hi Jørgen,
Making it truly symmetrical can be don...Hi Jørgen, <br />Making it truly symmetrical can be done. Relatively easy with only the voltage parts tracking, but more complicated when the current is thrown in as well. By the time you're done with it, there will be two separate supplies with one acting as a slave and one as the master. I did something like that with the earlier 0..30V supply also posted on my Blog. Have a look there for the details on how I solved that.paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-63574633600851751992022-08-03T00:14:27.857+02:002022-08-03T00:14:27.857+02:00Hi Paul
Thank you for publishing this. Nice desig...Hi Paul<br /><br />Thank you for publishing this. Nice design. I learned a few things :)<br />I hope to implement this as a fully symmetrical design (Tip142/Tip147) to give fx ± 30V.<br />I would like to to be tracking, that is, share one reference for pos/neg channels.<br />But I can't figure out how to make the reference voltage with two floating controllers.<br /><br />Can this be done?<br /><br />Regards<br />Jørgen, DenmarkJ. Thomsenhttps://www.blogger.com/profile/07607324082944538758noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-31758388072451550102022-08-03T00:06:48.320+02:002022-08-03T00:06:48.320+02:00This comment has been removed by the author.J. Thomsenhttps://www.blogger.com/profile/07607324082944538758noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-57549551081680500802022-01-06T12:04:15.591+01:002022-01-06T12:04:15.591+01:00Hi Paul,
My apologies, I MUST have skipped over i...Hi Paul,<br /><br />My apologies, I MUST have skipped over it, I have all the tabs open will go back and read carefully.<br /><br />Again thank you.Anonymoushttps://www.blogger.com/profile/00456225876849743399noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-72263807762359782392022-01-06T10:36:19.921+01:002022-01-06T10:36:19.921+01:00Hi Charles, I tried to explain the voltage regulat...Hi Charles, I tried to explain the voltage regulation in part1 : https://www.paulvdiyblogs.net/2017/07/my-new-power-supply.html<br />If you didn't already, please have a look. The output is compared and regulated against a fixed and stable reference voltage.paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-6194056857930602702022-01-06T10:22:14.077+01:002022-01-06T10:22:14.077+01:00Hi Paul,
Happy new year.
Have no idea if you ar...Hi Paul, <br />Happy new year. <br /><br />Have no idea if you are still active on this post or not.<br /><br />How do you regulate the voltage? I do not quite understand the voltage regulation part, it looks like it's an open loop implying that there is no active regulation? Am I correct in my assumption?<br /><br />Thank you for your development in this project.<br /><br />Regards<br />Charles.Anonymoushttps://www.blogger.com/profile/00456225876849743399noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-22551971424996712762020-01-22T23:01:21.981+01:002020-01-22T23:01:21.981+01:00I cant find your email. my is legolasster at gmail...I cant find your email. my is legolasster at gmaildotcom . Im from EU country :) Send me a message so we can make a deal.MaThttps://www.blogger.com/profile/10391329932862933832noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-12911359227139690532020-01-22T12:04:24.787+01:002020-01-22T12:04:24.787+01:00MaT, I have a complete working supply for sale. On...MaT, I have a complete working supply for sale. One of the supplies in this post. I can sell that with the power box that contains the transformer, or without. This box is pretty heavy, so it depends where I need to ship it to.<br /><br />I can also sell you a bare pcb with all the required components if you want. Let me know what you decide to do, and let me know what country you are in so I can estimate the shipping costs.<br /><br />If you decide to go forward, send me a note with your email address.<br />paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-76095154947613384482020-01-22T01:43:41.366+01:002020-01-22T01:43:41.366+01:00Hi
If i buy PCB from you do you add complete part...Hi <br />If i buy PCB from you do you add complete parts list?<br />RegardsMaThttps://www.blogger.com/profile/10391329932862933832noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-57808102372900734862019-04-16T19:46:18.423+02:002019-04-16T19:46:18.423+02:00Unknown, I have one pcb for sale.
€10,00 without ...Unknown, I have one pcb for sale. <br />€10,00 without postage costs.<br />Let me know where you live and I can calculate that.<br />I can setup a Paypal friend payment request.<br />Paulpaulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-58676292403014601712019-04-16T19:00:40.744+02:002019-04-16T19:00:40.744+02:00I really enjoyed reading through this whole proces...I really enjoyed reading through this whole process! I am also a hoobyest after work i play around and fix things.... I have been trying to look for plans on a controlable psu for my lab that could work for what i want with bo luck. If you have extra boards for sale msg back if not GREAT JOB!Anonymoushttps://www.blogger.com/profile/04937823993785531950noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-73136724104872850082019-04-09T08:48:25.031+02:002019-04-09T08:48:25.031+02:00The PCB and the supply prices are without postage/...The PCB and the supply prices are without postage/shipping because I have no idea where you are located.paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-8584743164407256522019-04-09T08:46:02.595+02:002019-04-09T08:46:02.595+02:00Hi Johan,
I did not make my boards available for o...Hi Johan,<br />I did not make my boards available for ordering through OSHpark because you'll have to make several modifications to make them work with the updated schematics. I have one PCB available for you for €10,00 which was my cost price and I also have the supply from this post available for sale for €60,00. Remember that the Power unit is not included.paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-16202223756335646772019-04-08T21:59:11.963+02:002019-04-08T21:59:11.963+02:00Is there a way to buy a PCB ?
Best regards,
Johan ...Is there a way to buy a PCB ?<br />Best regards,<br />Johan HolsteinJohan Holsteinhttps://www.blogger.com/profile/04645851445140531441noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-8715905969664477802018-07-18T16:33:05.217+02:002018-07-18T16:33:05.217+02:00This comment has been removed by the author.marshttps://www.blogger.com/profile/03319596788243961163noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-58925891440604760502018-02-11T11:40:24.809+01:002018-02-11T11:40:24.809+01:00Just took the buzzer out. I actually destroyed it ...Just took the buzzer out. I actually destroyed it while de-soldering, so be careful if that's what you want to do.paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-39847395513054381562018-02-10T20:02:12.078+01:002018-02-10T20:02:12.078+01:00Hi Paul.
Thank you for your recommendation.
VC8145...Hi Paul.<br />Thank you for your recommendation.<br />VC8145 is already at my place.<br />I checked it with the AD548 voltage reference.<br />The difference by 1 or 2 digits occurred in the fourth place after the decimal point (eg 7.5065V instead of 7.50664V), it's probably a good result :-)<br /><br />How did you turn off the buzzer?mariofhttps://www.blogger.com/profile/07027549697644628676noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-42401035240082334172018-02-03T09:31:02.063+01:002018-02-03T09:31:02.063+01:00Hi Mario,
Yes, I'm very satisfied with the VC8...Hi Mario,<br />Yes, I'm very satisfied with the VC8145, after I disabled the annoying beeper that is. The unit is very simple to use, precise and stable. Recommended!paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-12550774206674086962018-02-02T10:12:46.926+01:002018-02-02T10:12:46.926+01:00Hello.
Thank you for your quick response.
Now I&#...Hello.<br /><br />Thank you for your quick response.<br />Now I'm testing the idea you gave me, it looks good.<br />I read that you bought DMM VC8145.<br />Also, I want to buy the same.<br />Are you satisfied with Vichy VC8145?<br /><br />I wish you everything Good<br />M.mariofhttps://www.blogger.com/profile/07027549697644628676noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-82666266268607632372018-01-29T10:58:04.651+01:002018-01-29T10:58:04.651+01:00Thank you Mario!
You can certainly use a relays o...Thank you Mario!<br /><br />You can certainly use a relays or a MOSFET to switch the transformer winding's to a lower voltage, ie. use only one half of the secondary winding's. <br /><br />As a matter of fact, you can even put the winding's in parallel to get more power (Amps) out of the transformer as well. <br /><br />All you really need is a comparator circuit that drives a suitable relays, or a MOSFET transistor. I don't have a circuit for you right now, but I'm sure you can find them on the internet.<br /><br />If you care to look at my Curve Tracer post, I'm using a relays to switch two winding's in series. This comparator is more complicated, because it has to work on a triangle waveform, so it needs rectification before the level can go to a comparator.<br /><br />Enjoy!paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-50806556823585710392018-01-29T10:47:17.450+01:002018-01-29T10:47:17.450+01:00Hello.
I apologize for poor English.
Electronics i...Hello.<br />I apologize for poor English.<br />Electronics is my hobby.<br />You have done a very solid job.<br />I've built a trial version, it looks very good.<br />I think to switch the main transformer windings to make less heat on the transistor. Have you tried this solution? What difficulties can I expect?mariofhttps://www.blogger.com/profile/07027549697644628676noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-11760074089600993992018-01-26T18:27:51.921+01:002018-01-26T18:27:51.921+01:00I had them in my stash, some dated to the 60's...I had them in my stash, some dated to the 60's and 70's.paulvhttps://www.blogger.com/profile/11421488581167758443noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-2609333973813198572018-01-26T15:07:07.135+01:002018-01-26T15:07:07.135+01:00hi Paul
as a matter of interest where did you find...hi Paul<br />as a matter of interest where did you find a 0.6R 2W resistor for balancing the tip142 marshttps://www.blogger.com/profile/03319596788243961163noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-80681458885332645752018-01-04T11:11:51.094+01:002018-01-04T11:11:51.094+01:00This comment has been removed by a blog administrator.Anonhttps://www.blogger.com/profile/11078234431441937247noreply@blogger.comtag:blogger.com,1999:blog-7057630065429233264.post-56538813995382150782017-09-19T10:35:13.865+02:002017-09-19T10:35:13.865+02:00Really im not clear and understand how to build th...Really im not clear and understand how to build this psu, because the schematic is divide into several part at part 3 topic. Hope someone kindness want to draw the schematic in full schematic without separated the schematic. Thank youAnonymoushttps://www.blogger.com/profile/13369331305069245182noreply@blogger.com