Edge Collective

R&D Notes Vol 1


Misc Notes

How to create a BOM in Kicad


Notes on Pressure Sensors

BMP388

datasheet

Footprint:

Relative accuracy: +- 8 Pa / +- 0.66 m

Abs accuracy: +- 50 Pa

LPS35HW

datasheet

Footprint:

Relative accuracy: 800-1100 hPa

Abs accuracy: +- 1 hPa

Notes

Conclusion -- seems like we could make extended pads for the BMP388, and it's not going to be so much harder to solder than the LPS35HW. And we can pot it ourselves if need be. So this might be a reason for a first foray into kicad footprint construction.

Quahog ordering

22 uF on backorder

Ordered TIP42 PNPs from Mouser. Need to find SMT equiv.

Barrel connector

PJ202A on Digikey

PJ202AH on Digikey --- 5 Amp rating

Coin battery holder is a Keystone 3000, intended for 12 mm coin cell batteries -- 1216, 1220, 1225


Projects

Urban agriculture.

What's the FAO study on the prevalence / importance / role of urban agriculture world-wide?

Find argument (in Twitter thread) that urban agriculture and gardens should have a greater role.

Idea: combined infrastructure for urban ag, urban disaster-resistence comm, and flooding -- community - owned.

Focus on satellite communications, next.

Next design sprints:

Down the line:

classes

KiCad SMT Milling

P2P


Four Probe

Four Point Probe instruments


Knuth

The Adafruit Feather headers are 11.43 mm apart, measured from pin centers