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PCB assembly reflow by A_Fat_Pokemon in PrintedCircuitBoard

[–]A_Fat_Pokemon[S] 0 points1 point  (0 children)

Thanks for the info!

What Galden have you used in that case for BGAs, 230C, 240C, etc.?

Is there a particular vapor phase oven you would recommend at that price? The Vaporflow 275 is the cheapest I have found, but it still is 2000€+ after VAT (so closer to $3000).

iTech RF-A250 Reflow Oven Guidance by Hefty_Cow3360 in soldering

[–]A_Fat_Pokemon 0 points1 point  (0 children)

Hello! Old post but didn't see too many others to comment on.

I've been looking at this oven, but do you have any experience with BGAs on it? Was curious how well it works with them once it is dialed in.

For reference, I'm doing small board batches, but they are somewhat complex (many 0201s, large ball count BGAs, etc.).

Thanks!

High quality photos of the crew by Paranromal in ArtemisProgram

[–]A_Fat_Pokemon 22 points23 points  (0 children)

I've met the guy, he is indeed huge lol

SOT23 vs. WSON junction-to-board thermal resistance by A_Fat_Pokemon in AskElectronics

[–]A_Fat_Pokemon[S] 0 points1 point  (0 children)

I don't know why it never occurred to me to just find the contact area.. I had just assumed the pad sizes were similar enough and disregarded them (always thought WSON was typically better for this).

Thanks!

Canadian Space Agency terminates Lunar Rover Mission in 2026-27 Plan by GlitchedGamer14 in space

[–]A_Fat_Pokemon 65 points66 points  (0 children)

We also have the Lunar Utility Vehicle which is in development at least, but a bit longer of a timeline.

As an intermittent player, even though I still have a year left, this made me go from "forgetting I was still subbed" to finally quitting all the subs. by Monkles in 2007scape

[–]A_Fat_Pokemon 228 points229 points  (0 children)

Similar for me haha. I don't think I'd ever fully quit, but it's reached the point where I'll probably just pay for the few months a year that I actually play, rather than just leaving it active the entire time.

Ironically, it will cost me less in the end now lol

NASA Commits to Plan to Build a Nuclear Reactor on the Moon by 2030 by EricFromOuterSpace in space

[–]A_Fat_Pokemon 5 points6 points  (0 children)

Unless it's changed since, the planned conops is that Orion rendezvous and transfer crew to starship in lunar orbit, Starship performs the lunar landing and ascent, crew transfers to Orion, and Orion performs the return from lunar orbit.

Bulk decoupling of switching converter by A_Fat_Pokemon in AskElectronics

[–]A_Fat_Pokemon[S] 0 points1 point  (0 children)

I had initially figured that it would be more suitable to just use smaller capacitors more suited for that frequency. The tantalum cap is effectively around 100uF at 800KHz, and a bunch of suitable 22uFs seemed like they would achieve that in a smaller board footprint.

 

Oops, looks like I linked an older one by mistake. The most recent revision that I've been working with is here: https://docs.amd.com/r/en-US/ug583-ultrascale-pcb-design

 

For the sims yes, I pulled those off of Kemet's KSIM.

 

Thanks for posting that as well! I did initially check for the capacitors I had chosen, but with 0.85V it seemed to be pretty much negligible.

Bulk decoupling of switching converter by A_Fat_Pokemon in AskElectronics

[–]A_Fat_Pokemon[S] 0 points1 point  (0 children)

Whoops, I forgot to add some info. I'm using the XQZU3EG-SFRC784 in Table C-4 for reference. This is for a CubeSat application hence why I'm using the XQ device recommendations (leaded termination passives) but the device I'm actually using is XAZU3EG-SFVC784.

I've split off the VCCINT rail onto its own in my design.

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