psychogenic

@thegertel @matthewvenn I'm guessing the heat might be easy bring in but tough to dissipate ... more data coming soon :) Nice illustration of the dark side, btw !

@PsychogenicTech @matthewvenn Yes it's strange. You'd also expect it to be more generally symmetrical (for example, how come day time seems to be much longer than night time?). I'm not sure what kind of geometry this thing has, but in theory you can explain away almost all artifact as transient shadows

Graph shows frequency over time - why do you think it has a ~3 minute oscillation? What if I tell you the signal comes from a skull shaped ring oscillator? This open source silicon is currently sending data from low earth orbit!

Blast, I'm responding to the wrong post. See the repost of my graph, above (the RP2 temp sense data) where spikes at the top of the data, when it gets hottest -- that must be direct sunlight. But then it dips night when it's in theory exposed to light and shoots back up to the max, before starting to dip back down as the planet shields it from the sun.

@PsychogenicTech @matthewvenn I'm not following you Pat, what two big peaks?

@matthewvenn Nice! I want to get data for a full rotation or two, along side the RP2 temp sensor data--I'm really curious about the little noise in temp data we seem to get on every upswing and if the oscillator's sensitive enough to see that too.

We're thinking the sat is spinning slowly (HUNITY's gyro data seems to say so) and that this is actually being captured in the temp, in those two big peaks (and somehow maybe that blip at the beginning of the upswing, but I'm having trouble with it... reflection, heat from Earth, ??)

@matthewvenn Oh wow that temperature modulation is legit x.com/PsychogenicTec…

If I'm parsing the results right (the sensor experiment was by Mike Bell), these temperatures aren't all that bad--about -40 to +50C--considering the module is out there in naked on an arm extended out in vacuum.

Data... from SPACE! Received our very first chunks of results from my spasics module we sent up to LEO with a @tinytapeout ASIC aboard the HUNITY pocketqube. This is temp sensor data from the RP2040 used to command and control the experiments. All data sent/rcvd at github.com/psychogenic/sp…

@splinedrive We've been kind of settled on the RP2 since we started needing an MCU to control the ASIC project MUX--hard to beat the price/performance--and with the RP2350B we've got a ton of I/O and the upsides of the PIO. What would be the main selling points you see for the ESP32, here?

@PsychogenicTech Esp32 would be nice

Starting off the new year nice and easy: first pass at the info leaflet for the new version of the Tiny Tapeout demoboards.

@MoonbaseOtago @splinedrive @GMahovlic @tinytapeout Yeah, I agree(d) with you: this is actually the latest version of the TT demoboard: the 3v3 rail is basically 0.5mm when it needs to travel.

@splinedrive @PsychogenicTech @GMahovlic @tinytapeout Fatten those wires up, you have the room

I don’t know that much about pcb design; for now I’ve got 2-3 months to work on the layout.

Ya, on 4-layer I'll reach for that stackup often--love the tight loops and clean return paths though sometimes I'll break the beautiful plane on 3 used for the less critical signals (that stay exclusively on top) to get a bit more trace in when things are too congested, like I just did here.

@GMahovlic told me to use a 4-layer PCB stack-up: signal/ground/ground/signal. I couldn’t find that configuration anywhere — I always see signal/ground/power/signal… but hehe, @PsychogenicTech @tinytapeout board has that configuration. And here I can see that ‘magic’ thingswhere the signal goes through … amazing. github.com/TinyTapeout/tt…

Merry Christmas! I'm so grateful to all of you making up the open hardware and software community, sharing all your wonderful discoveries and creations. May these days be filled with cheer, family/friends, cozy vibes and maybe a little personal project time :)

FYI, these were done under my "open source discount", meaning once the project is delivered and finalized, everything will be open hardware and software.

Last deliveries before some holiday downtime: this guy's another way to easily let us swap out ASICs and FPGAs, and uses riffpga to have drag & drop UF2 FPGA bitstream programming :) Happy solstice!

@_josephogbonna Yes indeed! From M.2 pinout, through circuit, layout and prototyping for both boards, to firmware :)

@PsychogenicTech Did you develop the board yourself

@Dr_Timmay hah! It's a circularly polarized UHF antenna and, I have to say they're both cool looking and super satisfying to make and play with. Full design and instructions on thingiverse.com/thing:5878204

@PsychogenicTech I have no idea what this is but suddenly have an incredible urge to build one

Everything is made of physiks!1! My antenna was sharply tuned, to the WRONG FREQUENCY... Electrically longer than the metal--on purpose--thanks to the permittivity of the PLA, but by a bit much. So destructive tuning to the rescue: butt ugly now, but works! Right on 437MHz :)

Had some new friends over, today... oof! Was evacuated a few hours: everything's fine, here... next door wasn't so lucky. Got me rethinking go-bags, backups and evac plans. Thanks to the fire and police depts, and red cross: professional, courteous and got the job done.

Oh, my old ender 3? Nah, I don't need to maintain or calibrate that thing, every few months I just throw whatever at it and it'll be fine.

Separation confirmed! Hunity and our module are out in LEO!

Wow! One giant leap for open source ASICs !! Deployment in 30 minutes or so, but it is done: the @tinytapeout spasics module is up there! W0000000T!!!! Thanks @SpaceX and @AlbaOrbital for getting us this far, anxious to see the pocketqube tumbling out into orbit :)