RP2350 based GPIO expansion card

Creators & Developers Expansion Card
41

Ah, perfect! Mechanically, not the most ideal way of attaching but it should hold up if soldered nicely. I found these on Amazon, so I’ve ordered a set: elpart 10PCS 2.54MM Pitch Single Row Right Angle SMD/SMT pin Header 1x2/3/4/5/6/8/10/12/40 pin/p PCB Surface Mount Connector 3p/4p//40p - #elPart2313110 (Pins: 10pcs 40p): Amazon.com: Industrial & Scientific

It’ll definitely make prorotyping easier, without having to solder and desolder leads each time :slight_smile:

I’m going to also test the card on another system, do you think there’s any issue just plugging it into other devices via USB?

2 Likes
42

Glad you have found it! Yes, the pads are not great and for a future design I want to discover different IO ports.

No worries, it should work on everything with TYPE-C port (any any USB port if you have TYPE-C to whatever converter). I have even tried it with phone via Termux where I could install minicom.

1 Like
43

We’ve used these before on Expansion Cards to have it be a little cleaner: https://www.digikey.com/en/products/detail/preci-dip/8FM-78-0010-02-146/4140634

3 Likes
44

@nrp I told Tan @tansiret to do a male-female instead male male one, nearly poke into my palm from my bag. lol

2 Likes
45

rofl, @geerlingguy you just as crazy as @tansiret soon he designed its own FPGA and replacing the mcu inside, you probably can join him as a project as well, and do with partnering tinytapeout.

46

Yeah looking at that photo above again… I can imagine pushing in on the module from the headers and leaving the experience with a few new holes in my fingertip haha!

Always the fun of designing hardware, first step is make it work, second step is revising so the entire UX is great. I’m already excited about the board in its current state, but would like to see a way to more easily attach experiments if it goes into a sale-able product.

1 Like
47

Jeff Geerling channel has showcased the card in his DC-ROMA RISC-V Mainboard II review video! (from minutes 13:57 but watch the whole thing!)

1 Like