Anand

My first Digital Timepiece constructed entirely using PCBs. Rate my concept & share your thoughts. 😄 GitHub link: github.com/0101shift/Proj…

@nahitafu Oh, i thought you were using some older version of KiCad. My bad. 😅

@ImAnand_AI PROTEL99SEだから、3Dレンダリングすると固まっちゃうんだよ。

究極のPLL回路を設計中。4046を使って10kHz～20MHzまで発振可能。分周比はCPLDで自由に設定でき、ループフィルタはアナログスイッチとディジタルポテンショメータで可変。中央の密になった部分がVCOとフィルタと低ノイズ電源。4046でどこまでできるかの挑戦でもある。

@QVHenkel Oh, okay.

@ImAnand_AI No, it´s a customer project

On large boards with 8 or more signal layers, it´s important to place all (or as many as possible) layer transitions early in the layout phase, ideally after the component placement. Especially if only through VIAs and VIAs with backdrilling that require a bit more clearance are used. This design contains 16000 pads, any layer transition that needs to be placed during the routing phase might require a lot of cleanup time on the inner layers to make room for VIAs

@AI_in_LEO Design looks cool! Are these open-source? 👀

Card-Sat V0 is done! This is a business-card sized satellite. Many lessons learned here. At ~$80/sat I was north of beating $50SAT out for the title of cheapest satellite but at least I got to learn to make custom radios, solar panels etc. Next up: deployment & comms tests

@QVHenkel Is this your your framework SDR?

@ImAnand_AI Thank you :) This design was done by one of my teammates though. He did a great job! I can't wait for the boards to arrive

@mfranz_on Same here bro...

I need a garage-lab to make serious hardware stuff.

@AUDIY14 You can do Via-on-pad and place the capacitor beneath the IC. Or dog bone should work if the pitch is 0.8mm

BGAデカップリングっぽく内層から直接配線しつつ裏面のなるべく近くにキャパシタを置くか

@AUDIY14 Why not 0402 and 4L?

RP235xB基板設計してみて ・パスコンは1005でイケるとあるが0603じゃないと取り回しがツラい ・ピンにGNDがいないので2層基板は苦労しそう

@radiopench1 Thanks for the idea! I was looking for this for one of my display design. Keep us posted!

2020サイズのRGB LED(WS2812B)17個を6方最密充填した物の配線が完了して点灯テスト。 光の中心がチップの中心からズレているのが目立つ

@absak_ @MakeAugusta Jk... Not a big fan of HASL...

@ImAnand_AI @MakeAugusta Sorry mr rich man

She’s an 8, but she only orders boards with a HASL finish.

@roman_koshchei Have a big soldermask expose and use TH via connecting TOP and BOT for heat spread.

How do I make back layer on PCB like a heatsink? My back layer is fully GND, but I want it to act as heatsink too and to attach it to aluminum plate

@will_whang That's bad and funny at the same time. 😂

the pin sequence is perfect - but it is on the fucking other side

@blind_via @MakeAugusta I made waves on LinkedIn by posting this method... 😂 LinkedIn hardware community didn't go soft on this one.

Rate my PCB differential pair routing, twisted differential pairs 👍🤣

@blind_via Yeah. Also, while creating the footprint we should make sure the mating connector outlines are defined as part of mechanical layer.

@ImAnand_AI 3d features are pretty decent in Altium and KiCAD, but very weak in many others, so 2d geometries Reigh supreme there

It is a good idea to include geometry of your mating connector in the assembly layer of your PCB design for reference only. For exactly this kind of scenario, just because the connectors fit on the PCB in the space available, doesn't mean the mates do.

@blind_via Better to have RPP whenever possible to avoid short circuit.

Something I have learned already about this PCB design, the reference used had reversed polarities on the battery power connectors. 🥲

@Siddhant__rao Little worried about the antenna performance due to connector placed exactly beneath it.

New born baby

@kshitijgokul Let's go...

We’re in the process of ramping up our spacecraft manufacturing capacity to work on multiple challenging projects in LEO and beyond! If you like solving difficult problems and are excited about working with cutting edge satellite technology: come join us in building our planetary intelligence network. Apply here: pixxel (dot) space (backslash) careers