Hola paso a comentar, he diseñado un pcb, quiero mandar a fabricar 10 placas, es la primera vez que realizo un pedido. Necesitaria saber mas info, impuestos, aduana. Los papeles que debo llenar.Desde ya muchas gracias.
Hey there! im trying to design an Ethernet Circuit on a 2layer board, i know it sounds odd but that's what my company wanted.
Footprints:
U1: [MAC] PIC32CZ2051CA90144,
U2: [PHY] KSZ9031MNXCA,
J12: MAGJACK RJ45
D16, D15: TVS DIODE ARRAY(FOR ESD PROTECTION)
C36,C37: DECAPS FOR PHY
LEGEND:
RED: TOP COPPER LAYER.
BLUE: BOTTOM COPPER LAYER.
Im new to this ethernet/high speed designs. and ive heard that "we shouldn't place vias (with some exceptional cases), tight spacing between differential pairs with 100Ω impedance combined,. etc". But here from the very beginning i got stuck, as you can see the ratnets are criss-crossing. And ive checked both the Datasheets of my MAC and PHY as if there is any way to modify pins so that i can trace them without crossings, but they can't be modified.
i even tried to rotate U1 and U2 individually, but no use- this is the best possible way i can place.
Q1. CAN I PLACE VIAS AND TAKE THE TRACES FROM THE BOTTOM LAYER FOR THE 'A' SIDE PINS AND JOIN THEM AT 'C' & 'D' SIDES APPROPRIATELY???
Q2. IN IMAGE-2 RIGHT NEXT TO MY U2[PHY] YOU CAN SEE SOME DECAPS, AND YOU CAN SEE HOW I CONNECT THE GND TO THE DECAPS WITH BOTTOM TRACKS. IS THAT GOOD OR IT WAS BAD?
I will make the traces from my PHY to RJ45 as curved so i will do them at the end.
Finally, Please let me know if there is ANYTHING you would like to tell me.
Thankyou.
This is an awesome little device to keep on your desk while your phone is in a drawer somewhere, without you missing important notifications.
Osmo Pager was developed by u/abcsoups. Case design by u/paullagier. Using ESP32-S3 1.54inch e-Paper Development Board. Transparent tinted resin print ordered at PCBway.
Nothing like starting the week with some soldering! 🔧
Project by TheCuriousScientist(YT). Everything just lines up so cleanly here, a really satisfying ESP32 board assembly with solid soldering quality throughout.
NPN and PNP transistors are complementary devices that control current flow in opposite ways. An NPN transistor turns on when the base is driven high, allowing current to flow from collector to emitter, while its symbol arrow points outward and it primarily uses electrons as charge carriers. In contrast, a PNP transistor turns on when the base is pulled low, with current flowing from emitter to collector, its arrow pointing inward, and it relies on holes as carriers. In practice, NPN is more commonly used for low-side switching, while PNP is used for high-side control.
Have you used NPN or PNP in your own projects before? What's your experience or thought?