Really looking forward to the next part of this series, I'm deeply into electronics but never have enough money to purchase proper equipment. Therefore I can't wait to build my own Bench Power Supply. Your videos are thorough and simply understood, I'm sure many would agree. Regards,
I've always enjoyed the subject of electronics, but I only got into actually learning about it and understanding it better recently. I wanted to thank you for the amazing videos that you put out so far. I find myself more and more interested in this stuff because of them, not to mention that they're very informative and useful. Keep up the good work :)
Martin, this is probably the most interesting series on your channel. Not only because I'm building my very first power supply, but also because the way you explain things is just marvelous. It would be very nice to hear about the 2N3055, since I plan to use three of it in my build. Please get back to me if they are really outdated and there's a much better option instead (e.g. in the topic I opened on your forum for my project I listed another one).
If i can make a suggestion before you commit to your pcb layout tool Martin... Try DipTrace. It has a free version, and it has been absolutely wondeful for me. Very intuitive, simple, and great for someone who's new to pcb cad work. I'm a really happy customer, that's all, but it's given me a huge advantage over other tools I've used, including Designspark. peace,chris
Great new project Martin good to see u are continuing the same power theme. That way there is a continuation to your projects. I have to say that I like the way u think and explain things. Very good work.
One little think I'd suggest for the final design is to built it so that it is easy to take apart and potentially repair. I would use connectors for the various voltages coming from the transformer(s) and possibly for the display(s) connections. This is not brilliant information by any stretch of the imagination but I thought it may help make the overall design simpler and more elegant. Anyone far wiser than I am, please correct me! :) Cheers, Jerome.
When tracing out circuits like that, I normally take photos of the top and bottom of the circuit board, put them in separate layers in GIMP, flip the bottom side, make the board itself transparent and put in a colored background layer that has a nice contrast with the tracks and components, drag the layers around until the components match the traces and then I have a great overview of the circuit. Then I add a transparent layer on top and use the pencil in line drawing mode to sketch out the circuit, putting in schematic symbols, coloring traces depending on what their purpose is and often draw external connections in the margin of the picture. Super handy and a lot quicker than using a magnifying glass and your fingers to match traces to components on separate sides.
Nice break down of the supply Martin. Have you decided which avenue the refit is going to take? Stay with the analog controls or convert it so a micro controller, possibly even have an Arduino do the chore of voltage/current control and driving a LCD display?
2N3055 are very common in the States still , the TO 3 package is a little harder to come by now.400x diode is very common also ,400_ is a 1Amp and the last digit is the P.I.V.,but for most cases of Full wave bridge rectification a premade module is used.
2n3055 is oldschool but i wont call it oudated yet. Just like the 2n3904/bc547 (they were all designed in the sixties!) they are still used today because it is designed very well. You shouldn't have any problems at all finding the part since it is still used a lot in linear powersupplies, amplifiers and dc-ac converters.
The other thing I wanted to mention was the rectification. When you have a centre tapped transformer and two diodes that is called a "Full Wave Rectifier". When people build there own versions ov the PSU though, they could use this arrangement or instead a bridge rectifier if they have a single ended transformer, rather than one like yours. It would probably have to be a single winding ov around 40 volts in this case though.
Yeah there won't be any problem getting a 2N3055 as someone pointed out, but for an upgrade a 2N3773 is similar but can dissipate a bit more wattage - useful for the higher currents at the ;lower voltages in a linear supply. Or a more modern (and easier to mount) package could be had with a TIP3055 instead. The diodes are no problem, but you'll have to figure out what the actual votage ov that zenner is. The hardest component to get might be that FET but a MPF 102 should suffice for that.
20355's are available on eBay - I know I just received some for an old Micronta (Radio Shack) dual tracking supply I'm rebuilding. Replacing all the transistors, ICs, capacitors and control pots with 10 turn precision ones. So this is timely and fun to watch. I'm sure not all those parts need replacing but they're cheap so why not give the supply a new life.
I have just bought a power supply unit today 3005sm. As I am new to Electronics I am also wondering about Arduino Arduino Keep hearing it but should I start with it as a newbie to Electronics? I am looking for the 2nd part of this rebuild. very interested in following it along. Oh I got a free CSI 2110 digital Multi Meter with the Power supply unit. Is it any good can anyone tell me?
Really looking forward to the next part of this series, I'm deeply into electronics but never have enough money to purchase proper equipment. Therefore I can't wait to build my own Bench Power Supply. Your videos are thorough and simply understood, I'm sure many would agree.
Regards,
I've always enjoyed the subject of electronics, but I only got into actually learning about it and understanding it better recently. I wanted to thank you for the amazing videos that you put out so far. I find myself more and more interested in this stuff because of them, not to mention that they're very informative and useful. Keep up the good work :)
Martin, this is probably the most interesting series on your channel. Not only because I'm building my very first power supply, but also because the way you explain things is just marvelous.
It would be very nice to hear about the 2N3055, since I plan to use three of it in my build. Please get back to me if they are really outdated and there's a much better option instead (e.g. in the topic I opened on your forum for my project I listed another one).
My pleasure, thanks for the feedback Gary.
My pleasure, thanks for the feedback.
If i can make a suggestion before you commit to your pcb layout tool Martin... Try DipTrace. It has a free version, and it has been absolutely wondeful for me. Very intuitive, simple, and great for someone who's new to pcb cad work. I'm a really happy customer, that's all, but it's given me a huge advantage over other tools I've used, including Designspark.
peace,chris
Great new project Martin good to see u are continuing the same power theme. That way there is a continuation to your projects. I have to say that I like the way u think and explain things. Very good work.
Very good idea Jerome, thanks for the post.
This is going to be fun, can't wait for the next part!
looking forward to the next video in this series. Hope it comes soon!
One little think I'd suggest for the final design is to built it so that it is easy to take apart and potentially repair. I would use connectors for the various voltages coming from the transformer(s) and possibly for the display(s) connections. This is not brilliant information by any stretch of the imagination but I thought it may help make the overall design simpler and more elegant. Anyone far wiser than I am, please correct me! :) Cheers, Jerome.
Thanks for the input Chris.
Looks like you could have done with a full copy of Dave cad for your diagram! Excellent video Martin thanks for sharing your knowledge.
Yes..that's part of the plan for the next one in the series.
When tracing out circuits like that, I normally take photos of the top and bottom of the circuit board, put them in separate layers in GIMP, flip the bottom side, make the board itself transparent and put in a colored background layer that has a nice contrast with the tracks and components, drag the layers around until the components match the traces and then I have a great overview of the circuit.
Then I add a transparent layer on top and use the pencil in line drawing mode to sketch out the circuit, putting in schematic symbols, coloring traces depending on what their purpose is and often draw external connections in the margin of the picture.
Super handy and a lot quicker than using a magnifying glass and your fingers to match traces to components on separate sides.
Nice break down of the supply Martin. Have you decided which avenue the refit is going to take? Stay with the analog controls or convert it so a micro controller, possibly even have an Arduino do the chore of voltage/current control and driving a LCD display?
Will go analogue for this build...I need more time with Arduino before considering micro controller.
One suggestion: it is a good practice to include an Over Voltage Protection (OVP) to the PS
Best regards,
2N3055 are very common in the States still , the TO 3 package is a little harder to come by now.400x diode is very common also ,400_ is a 1Amp and the last digit is the P.I.V.,but for most cases of Full wave bridge rectification a premade module is used.
2n3055 is oldschool but i wont call it oudated yet. Just like the 2n3904/bc547 (they were all designed in the sixties!) they are still used today because it is designed very well. You shouldn't have any problems at all finding the part since it is still used a lot in linear powersupplies, amplifiers and dc-ac converters.
The other thing I wanted to mention was the rectification. When you have a centre tapped transformer and two diodes that is called a "Full Wave Rectifier". When people build there own versions ov the PSU though, they could use this arrangement or instead a bridge rectifier if they have a single ended transformer, rather than one like yours. It would probably have to be a single winding ov around 40 volts in this case though.
Great videos, waiting for the rest.
Good work!
But when will be the next electronics tutorial video?
Transistor,capacitors, etc
Yeah there won't be any problem getting a 2N3055 as someone pointed out, but for an upgrade a 2N3773 is similar but can dissipate a bit more wattage - useful for the higher currents at the ;lower voltages in a linear supply. Or a more modern (and easier to mount) package could be had with a TIP3055 instead. The diodes are no problem, but you'll have to figure out what the actual votage ov that zenner is. The hardest component to get might be that FET but a MPF 102 should suffice for that.
I'll be curious to see a nicely drafted version ov the schematic once you have done that...the pencil version is a bit hard to follow on TH-cam...hehe
20355's are available on eBay - I know I just received some for an old Micronta (Radio Shack) dual tracking supply I'm rebuilding. Replacing all the transistors, ICs, capacitors and control pots with 10 turn precision ones. So this is timely and fun to watch. I'm sure not all those parts need replacing but they're cheap so why not give the supply a new life.
Well it's timely for me - even though it was 2013 lol.
the 1n007 IS NOT outdated (I don't think it is)
It is one of my most used diodes.
Good point!
Thanks for the info.
Would a toroidal transformer be better or don't it make a diffrencs?.
Hello, I have been following your stuff for a little while.
Could you please make some simple applikations with discussion and calculations.
Did I hear "whatsapp meter" :-) Thank you for great videos!
I have just bought a power supply unit today 3005sm. As I am new to Electronics I am also wondering about Arduino Arduino Keep hearing it but should I start with it as a newbie to Electronics? I am looking for the 2nd part of this rebuild. very interested in following it along. Oh I got a free CSI 2110 digital Multi Meter with the Power supply unit. Is it any good can anyone tell me?
;-) Thanks Andrew.
I still consider Elektor 1982 ( December issue I think) as a reference oldie goldie lab psu design.
No problem, i just checked for you and on ebay 2n3055's are about $1 a piece!
Don't forget to glue a final copy of your circuit diagram to the inside of the case. Someone, perhaps yourself, may thank you in the future.
Thank u Sir
Nice :-)
A great example of how NOT to draw a schematic.