Anas Malas

Want to make the slimmest USB C PCB ever? These footprints are now open source, and in public domain! Enjoy! Make sure your PCB is 0.6 mm thick, and show me the cool stuff you make with them. github.com/AnasMalas/pcb-…

@prokokoko I wish my silk PLA had that strong adhesion to my build plates! It took a lot of turning to stop it from coming off mid print!

シルクフィラメントは積層が弱い、クールプレートの定着が強い、の条件が重なると稀によくある事象。

@ja2gqp I dont understand it, how can it be a band pass filter when it looks like there is a DC connection? Am I not seeing it right? I'd love an explanation for that please

1.2GHzのBPFを作った #hamradio #アマチュア無線 #電子工作

@RueNahcMohr @ja2gqp On a PCB, it is often emphasized that a ground plane is needed below a trace. Thats because together they somewhat control the field! Get them away from each other, and while the current stays the same, the fields spread and you start having "RF" behavior. Just waves propagating

@RueNahcMohr @ja2gqp But thats the important thing, they never are! Not even at DC! All of the energy flows in the air, non of it flows inside the copper. The current is a side effect, and a way to simplify how we think about it. E field causes the current, causes the M field. RF suddenly makes sense

@RueNahcMohr @ja2gqp Shift the way you think, what wires actually do is move the energy from one place to another, which is in the electromagnetic waves between two or more conductors From that perspective, RF stops feeling so disconnected. The fields just stop being contained by the wires!

@ja2gqp だから私はRFが好きではないのです。電気が空気中ではなく電線を通って流れる世界が好きです。

@sabanekko1 This is for just 7.5 mA. At low enough current, any diode can achieve a forward drop of 0.2V, though at much lower currents (microamp range)

このダイオード順方向電圧0.2Vってマジ？？ マイコン回路の電源ダイオードOR用に最適すぎるだろ

@faraz_r_khan Last week I found an awesome Solidworks YouTube channel! Things that took me years to stumble upon or discover that they work better were explained very concisely, and I learned a lot of new things. Hope it could be helpful to you and others @tootalltoby" target="_blank" rel="nofollow noopener">youtube.com/@tootalltoby @TooTallToby

Solidworks - one of the most popular cad software sucks so bad that the advice from experienced mech-es is to simply use as little parametric modeling / references as possible otherwise “bad things will happen”. Crazy you all deal with this daily 😅

@AutoShade_386 @afshawnl SW is extremely unintuitive and could be better. But it is possible to tame and make very complex parts that dont break even with very major changes upstream. Takes a lot of learning, trial and error, and patience. But it is possible. Too tall toby on YouTube is great for tips

@AutoShade_386 @afshawnl Breaking downstream features is also avoidable as long as you understand why they break. Here's an example: coincident to edge relation can very often be swapped out for coilinar with face. One breaks when you breath, the other is very stable

"we integrate with the CAD software you already use" the CAD software you already use:

@zackslab Yeah thats a common method, using a cap to change reference. However, think of via inductance and cap resonance. Your quick digital signals, unless slew rate controlled, are higher in BW than the cap allows Thats why S/G/G/S is better, the two vias complete the transmission line

@CapacitAnas like he mentioned, i dropped GND vias next to all my transitions from 1 to 4. if they were high speed i'd decouple the transition too, but most are DC.

yooo zachariah peterson reviewed my sensor board on the Altium Academy channel!

@zackslab Im glad your design isn't noisy, as Zach points out, you had a copper pour on L4 and lots of stitching and that probably helped a lot. The return current / the fields didnt need to spread to find their path, not as much as if you didn't have those pours on L1 and L4

@zackslab Signals can reference power, sure. But changing reference is not a good idea, and that's what happens when you go from L1 to L4 in S/G/P/S. IMO, most designs can be perfectly served by a power "island" pour on L1/L4 where there is high via density. Else just route the power lines

@i2cjak Cool!

The Rockchip RK3588 has built-in HDMI receive! You can literally turn this little guy into a V4L2 capture card for whatever purpose. I'm using this with a Morse Micro Wi-Fi HaLow chip to get long-range video streaming working at go kart tracks!

@FellaJohnLittle @i2cjak So both support AVS from 9V-20V! If the industry converges on AVS for most things and PPS when needed for its special capabilities, new things might charge faster. However, things getting better fast requires USB IF to start being sensible with the branding, for fuck's sake!

@FellaJohnLittle @i2cjak Then they made the trainwreck worse with AVS. There is a silver lining, however. AVS will now be required on all chargers that follow PD3.2 and have power between 27W-240W. For example, the Google Pixel Flex 67W (Ha!) and the Apple 40W/60W dynamic charger are both PD3.2.

USB-C is lowkey nice. It keeps the sprung part (more likely to wear out) in the cable instead of the expensive device.

@i2cjak And now they allow you to combine shipments from JLCMC and JLCPCB. Not sure if JLC3DP and JLCCNC too

JLCMC carries steppers now, btw...