EEVblog

Part 9 is HERE: • EEVblog #244 - How To ...
Part 10 of the PSU Design series, and Part 2 of the PCB Layout, this time, editing the changes from REV A to REV B and pushing the changes through to the PCB and doing a revised layout. Time lase is x20 speed.

[@bitrot42]

Great video. I always wondered if I was doing something wrong when updating an existing PCB layout... Now I know it just plain takes time to do the job. Thanks!

[@TOinaeraser]

I find it funny that so many people are saying SMT would be sooo much better. Dave made a very conscious choice to use through hole components, and while many hobbyists are able to able to solder them (including myself) it is not something that everyone wants to do. Using through hole also makes it much easier to test your finished boards without building in test points or stuff like that. All in all it doesn't impact the finished board too much, as everything fits and it is feature full.

[@pyroesp]

Awesome video, as always !

[@akompsupport]

These videos are amazing!

[@EEVblog]

Yes, I used to use tap on clear film and had to physically "rip-up"

[@oBsRVr666]

@TheEPROM9 The board is Arduino compatible, hence it is programmed in the Arduino language, which is a simplyfied C language.

[@NickBR57]

All these years later I have found this superb series of videos. Thanks Dave for a fantastic insight into the design and refinement process. A long shot, but is it possible to get hold of a pcb for this design at this distance in time? Would love to build it!

[@magnuswootton6181]

I think you have to buy it as a finished product, nice souveniere definitely.

[@shmore]

Love these videos

[@lodevijk]

@somebody301 This is an open design, meant for everyone to use. Not everyone can solder SMD.

[@TOinaeraser]

As to the autorouter, I find it very enjoyable to route manually, and while the autorouter can do a good job, it is usually only in specific situations. For a board like this, with many power and ground considerations, the autorouter could only be used for a few traces, so it ends up easier to just do it manually. Plus all the time setting up the autorouter would rid any advantage.

[@MrStemkilla]

cool i would have gone with a bigger board but you did it fine how it is. really cool to see how this all works

[@ornotermes]

@soclt That might be, but if one need to save space while trying to avoid SMD I think they're still worth looking at.

[@EEVblog]

Usually not, not high enough freq components.

[@METALsyndr0me]

This is so cool.

[@o0Adun0o]

Why didn´t You use a Top GND Polygon?

[@insonicbloom]

@gbowne1 the board is that size because he has a specific case in mind. I don't think he just threw together a random board size, there was thought that went into it!

[@insonicbloom]

@kiyotewolf perhaps Dave should go back and edit the last one so you do like it? what did you hope to accomplish by informing him of that

[@gbowne1]

I was thinking you might need a teeny little bit bigger board. I've used my Altium in DSP design for RF. I basically totally redesigned a 1980's era radio.

[@EEVblog]

@KiloSierraAlpha Nope! I always manually route.

[@oBsRVr666]

@lodevijk I guess you're right. "Selective" vertical mounting might save some space indeed. Why didn't I think about this, when I commented on your comment. :)

[@kennethandrysiak4130]

Like your channel. With all of your discrete pull up resistors… why did you not go to SIP for those? Cost? That would have freed up some space (noting that that kills off your suggestion in the first video of how you can run traces under the resistor bodies). I’ll have to look at your finished Rev B to see just how many traces are actual run under the resistors. That may put to bed my idea. 😊

[@oBsRVr666]

@somebody301 He wants to sell this as a basic kit. He specifically decided for THT components only, to make soldering the kit as easy as possible. (Aiming at beginners, etc).

[@mrcampbell7674]

Would you ever just re-do the layout from scratch vs trying to edit an existing layout?

[@music99matt]

isn't it bad to have a track going over so many vias? (R1 through R10) Or if they are completely surrounded it's ok? what about R35-R45?

[@ChenxiangHsu]

Hey, Dave. Have you fixed the DAC 's problem since Part 8 ? I am just so eager that how you to solve a problem .

[@IIGrayfoxII]

What do you want to design? I use a program called Pad2Pad. It is kinda easy to learn and use. Another is PCB express but this has issues on printing.

[@lodevijk]

@oBsRVr666 I know that, but the thing is that all of the resistors on that board are horizontally mounted. If it were me, I'd have no qualms to mount some of them in a different way to save space.

[@spunts144]

I really want to buy one of your portable microPSU's D:

[@lazerusmfh]

@kikilosabeyno This will be a kit that you assemble, so no SMD for ease of soldering.

[@kildas]

I think You can make this design easier by using SMD parts. The biggest SMD components are fairly easy to solder even for hobbyst. SOTx packages arent that bad either.

[@friedmule5403]

EEVblog would a 4 layer board not have made it simpler? I know it may cost more but placing signal, ground, power and signal?

[@oBsRVr666]

@MrStemkilla The case of the box the PSU will be mounted in dictates the shape of his PCB. You could always use a bigger box, eh? :)

[@Polished_Perspective]

I assume you are going to be selling these in EEVblog shop. Do you know what price tag will go on it?

[@brianmcenulty]

@AxelWiresmith Eagle (by CadSoft) works great

[@MacGuffin1]

@m4ge123 Looks perfect... Thankyou :D

[@mm5032]

Is this going to be in your store

[@lodevijk]

If I were to do one thing to save some space here it would be to mount the resistors vertically, so that they don't take up a centimeter of space.

[@praveshvats432]

Why I can't download this video using IDM ?

[@oBsRVr666]

@gbowne1 The shape of the PCB follows the inside of a certain project box Dave decided to use. I assume he can't make it any bigger than that.

[@PD2DXN]

Can I download the pcb design somewhere?

[@nikolaradakovic5050]

Dear Dave, Regarding high speed design rules, every chip manufacturer has it's own rules of thumb for high speed PCB design. Is there any reference manual or book comprising all the rules generally used in high speed PCB design?

[@krokodyl1220]

+Nikola Radakovic I highly recommend "High Speed Digital Design: A Handbook of Black Magic"

[@jasonstraurss6974]

hay dave, thanks for the awesome video's! just want to ask where you learnt how to read and design pcbs?

[@cbgadget100]

Jason Straurss a combination of his engineering degree and tinkering around

[@jasonstraurss6974]

haha just need a degree then, damn, thanks Corey

[@cbgadget100]

Jason Straurss not at all!! Keep watching these sorts of KZbin videos, tinker around yourself, trial and error and you'll get there

[@RandyLott]

Are there specific guidelines that need to be taken for routing SPI, i2c, or UART lines?

[@manojkumarsubramaniam7991]

just make sure you have a grounds down them. they are not very high frequency but due to fast transition they have some high freq component. Will save our ass from issue like cross talks and noise

[@lazerusmfh]

@kildas While true, people still complain. and it is a lot easier to mess up a hand soldered SMD board, when you have a lot of components.

[@nikolaradakovic5050]

thanks krokodyl

[@insonicbloom]

@heroineworshipper why on earth would you think not having a schematic done first is a good idea?

[@oBsRVr666]

@lodevijk Could be hard to run as many tracks underneath a vertically mounted resitor ... Just saying.

[@ornotermes]

One way to save space could be to replace R46 - R53 with a SIL resistor.

[@ashleyhughes398]

Hmm I struggle at routing a board with quarter of the parts. Your doing this like a machine

[@szymz19]

Hi there, I'm looking for an idea for pcb. I want to design something complicated and big like A4 sheet size. RF is not an option so PC mainboard is out of consideration. Do you have some idea what could that be?

[@knodelcrafter6888]

szymz19 Then you have to do a big and complicated project and integrate everything on one board... Maybe you want to make an automated car and integrate the power supply the servo drivers maybe camera headers for computer vision controllers sensors with servos (like a lidar)... maybe you can think of more... RC won’t be a problem after you managed such a large thing! Just look around the internet for other projects and integrate everything that could remotely fit 😂

[@BarsMonster]

Apparently you don't like to use SMD jumpers to simplify 2-sided routing... :-D

[@lazerusmfh]

@Nickafyit in this sense, a VIA means a Drill hole, that is plated through, or in other words, it joins a connection from the top layer to the bottom layer, so you can run a trace on both the bottom, and the top, and connect them.

[@insonicbloom]

@kiyotewolf it's a public comment section, therefore it's anyones business, if you want privacy I suggest you contact him via email otherwise whatever anyone says is open to everyone

[@chair547]

honestly for simple boards i usually just redo them

[@ILoveCiniminis]

I would realy appreciate if ucould make some computer hardware tutorials split to many parts for newbies and step by step u could go with them to more advanced tutorials. Also your videos are still super cool, Thanks 8}

[@michelfeinstein]

Hi Dave, why did you use a resonator instead of a crystal? and why AVR, since you rather PICs? Thanks for the video!

[@Regular6782]

@KiloSierraAlpha Dave doesn't like auto layout.

[@TurboHawkV6]

E'ryday I'm shufflin'

[@nickwallette6201]

Girl look at that schematic... Girl look at that schematic... I layout...

[@mm5032]

@eevblog

[@SjoerdBeukers]

nice patypus

[@oBsRVr666]

@heroineworshipper Seriously? Try working on a very complex design that way (without a schematic). You will most likely mess up something. You will also lose a big bunch of benefits that way. Like cross checking between schematic and PCB. Labourintensive work, imo. Back to the 1970. :P

[@md.mostafakhan4529]

Football...

[@cimmerian100]

meow 14:05

[@TOinaeraser]

One more thing. The other major critism with this project is Dave's choice of Altium Designer. I'm going to start a religious war here and straight up say: Eagle is a piece of shit. Having used both, Altium, while still a royal pain in the ass, is not nearly as annoying as Eagle. Plus Dave has used Altium seriously for years, so there is no compelling reason for him to use a new package for one project. Open source hardware or not. /Endrant

[@BersekViking]

Boring...