Greg

Hi 👋 I'm Greg, hardware engineer. I enjoy designing and building open source hardware projects. along with taking macro photos to document the process. Previously at a startup I used FPGAs and thermal LWIR cameras to map bushfires from aircraft Currently doing RISC-V ASIC things at IQonIC Works

A very basic setup, but it is working. Next step is to 3d print an actual sensor/lens holder.

Well there's your problem. 🥲😰

I fixed a damaged USB-A port on a PS5 this week. The most tedious part was the 42 security trox screws encasing an EMI/Heat shield to the motherboard. 🙃

Not my neatest work, but it works. This wire's pvc melts super quickly, so soldering can be a challenge. But I still prefer having the colours 🙂 A quick 3d print to hold the wires avoids strain

The scope traces were crisp atleast. Maybe I didn't need to look to closely at my xacto scratching and probe landing 😆

Well there's your problem. This chip has a pimple outbreak. 😅

Pretty cool that you can actually see the logic clouds as a blob in the middle. Early parts from wafer.space, perfect to take photos

@tinytapeout.com logo is crisp 😍

Quick weekend project to put enclosures over my various Glasgow prototypes. Teaching myself the "configurations" feature in fusion to handle slightly component placement differences between various Cx versions.

First samples on the first run from wafer.space! There is a disclaimer with these parts, that only ~80% are fully bonded successfully. This could be marketed as a feature, an air gapped solution using state of the art wireless bond wires. 😜

Fresh and custom silicon day! 😍 This is a multicore riscv soc design based on the serv processor core. Based on GF180MCU PDK, and fabricated through wafer.space 🚀

When the stencil aligns perfectly 🫠

Small USB PHY from WCH. CH123C. Who needs symmetry in footprints 🤪

Oscillators don't like begin installed upside-down 😭

LEDs ❇️ These are about all on at about the perfect brightness for visual indication. But my standard macro photography process (off camera flash) just floods so much extra light that these appear really dim.

Debug time

Another day. Another bodge ✨

It has been 0 days since I forgot i2c pullups. 🥲

Some BGA footprints are distinct enough to act like a fingerprint for the part. If you've used this part on a board design before you'll likely recognise it. 😉

Solderpaste 😯

Surface mounted components atop solder paste

I'd forgotten that the ECP5-25F doesn't have all the I/O, and 4 or so pins that are on the 45/85F are N/C on the 25F. I just happened to use one of these for the ULPI interface. 🥲 Bodge wire to the rescue! Now we're enumerating again! USB boot loader in gateware, takes up ~15% of the device

Tombstone time

These two boards have the same BGA geometry defined in their gerbers. For some reason JLCs DFM adjustments have expanded all the "via in pad" connections. Makes for an interesting visual effect.

How's my solder paste application? I think I missed some spots. 🫣

FPGAs programming FPGAs 🐢

Can't recall where this came from, but ended up in my labs cable drawer. Curious why it wouldn't enumerate.. 🤮

I've been using KiCad 9's new table features to aid in schematic documentation. I guess it makes sense.. But still puzzled me for a moment that you can perform a vertical/horizontal mirror on a single cell. 🙃

Designed this board years ago, and finally ordered it. The pattern looks really cool on the physical boards. github.com/gregdavill/a...

Circuit boards ❇️