Great video. A few notes: - The HV blanket should cover all parts up to and including the left side of the transformer and optoisolator. Neutral is a high voltage net if the outlet or power cord is wired backwards or the neutral opens up upstream of the outlet - I would add the voltage ratings for C16 and C23 on the schematic as they are both high voltage caps - I would also add a bleeder resistor across C23 - The clearance in the GND-P pour for C23 positive pin looks too close for 388v (275V * 1.414)
@Zachariah-Peterson
8 ай бұрын
That HV blanket is used for a clearance rule, the rules is set between all nets in the HV net class and all other traces, so it covers the case you are referring to since that rule takes priority. But anyways, the build of this is in progress and I'll do another video on it once it's finished.
@leeslevin7602
8 ай бұрын
I really enjoyed this video, very informative. Thank you for sharing.
@mostafanfs
8 ай бұрын
I really enjoyed the video. You really know you're way around hardware designing very well. It would also be cool to see it assambled and running
@Zachariah-Peterson
8 ай бұрын
Build is in progress, I am waiting on the transformer assembly and bare boards now
@petersage5157
8 ай бұрын
Very nicely explained. The only thing I would add is there should be the typical isolation slot (under U9 and T1 in this case) to increase creepage distance.
@Zachariah-Peterson
8 ай бұрын
Lucky for you guys I am building some of these modules and the custom transformers for another video! stay tuned....
@Cannabic
8 ай бұрын
It would be nice to see a simulation of that flyback in Altium
@JeffreyBoye
8 ай бұрын
Can you provide some additional insight into how the feedback path works? I'm trying to understand the selection of bias resistor values on both sides of the optocoupler. Thanks!
@Zachariah-Peterson
6 ай бұрын
Sure, this kind of feedback method uses a shunt regulator to bias the LED side of the optocoupler at a specific value. The shunt regulator has a threshold at which it starts admitting power delivery to the optocoupler, which is why you have that resistor divider. On the primary side, the resistors are chosen such that he FB pin is biased at a target value. So if you are below the shunt reg. threshold, then the current in the optocoupler drops, and then the voltage reaching the FB pin also drops, this then drive adjustment of the PWM signal internal to the switcher.
@mdyusuf3174
8 ай бұрын
Great video very informative for hardware design engineers I would like to know that how to isolate the input AC line from DC voltage and asking how much the AC trace thickness should be thank you
@Zachariah-Peterson
8 ай бұрын
AC trace sizing (thickness and width) should be based on the amount of current it will need to carry. In this example the flyback converter is stepping down to a low voltage so it will have very low current on the primary side. Still, it is typical to make the traces on the input large enough to handle any surge current when the device first powers on or if there is a fault somewhere on the primary side.
@adamkaminski8466
7 күн бұрын
Hello. Where to find the 3D model and footprint of the transformer ?
@errayyanar
8 ай бұрын
Great explanation!
@Shark_Oswald
8 ай бұрын
The switch U8, I don’t prefer make the optical coupler output route under switcher U8.
@Shark_Oswald
8 ай бұрын
But anyway it will work❤
@mohameddrissi1075
8 ай бұрын
thanks sir for this clear explanation , I have question about return current path and having a solid ground plane under traces . why we don't care in power electronics board about return current path ?
@Zachariah-Peterson
6 ай бұрын
We do care about the return current having a well-defined location, including in power electronics. In this design, the primary ground is being placed under the switcher with a direct connection to GND and to the bridge rectifier to complete the circuit. The input line and neutral form the remainder of the return path on the primary side. On the secondary side, I also placed a GND pour region to form the return path for the 3V3 output. If this were a switching converter with an inductor, we would also want to place ground below the switch node to control where the return current exists and to control radiated emissions. You can learn more about this aspect in this video: kzitem.info/news/bejne/l5-kym2sqKJ8jag
@bookerlin5987
8 ай бұрын
Hi Zach, Altium Rule quickly question, Can it set a rule to check a spectial VIA(not thru pad hole) with only one line in all layers? The correct case is that there must be copper or wire segments connected in the two layers, Thanks
@sentient1640
8 ай бұрын
Thanks in advance.
@abbasjawadwala7691
8 ай бұрын
Shall I add any board cutout under isolation barrier? if added what will be the pros and cons of that?
@Zachariah-Peterson
8 ай бұрын
It is not a requirement for the design to function, but it does increase creepage distance if low creepage is a problem, and it makes the boundary between the isolated regions very easy to see for someone who looks at the board, so nothing wrong with adding it. I have seen boards that include the cutout and some that do not.
@abbasjawadwala7691
8 ай бұрын
@@Zachariah-Peterson when shall is use pcb cutout , are there any use cases?
@electroroomi
8 ай бұрын
Didn't find any blog link to design the transformer..
@Zachariah-Peterson
8 ай бұрын
The blog link has been added into the description
@MrThoriam
8 ай бұрын
Where is the link how to design transformer?
@Zachariah-Peterson
8 ай бұрын
A link to the blog has been added to the description
@Zachariah-Peterson
6 ай бұрын
You can also watch this video: kzitem.info/news/bejne/jm1ozWWMb6hheoY
@Onlyindianpj
8 ай бұрын
Someone asked and you showed I have asked so many times to show arduino pcb creation on altium and you never show 😞😞
@fraserjeffrey7508
8 ай бұрын
Phil's lab, another Altium contributor has a great video on designing a raspberry pi from scratch: kzitem.info/news/bejne/uWZmqaFrhX9_hKA
@Zachariah-Peterson
8 ай бұрын
Are you looking for a video on a custom Arduino PCB layout?
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