Piotr Esden-Tempski @esden@mastodon.social
Embedded Open-Source Hacker? Founder of http://1bit2.com and contributor to all the things including PaparazziUAV, Black Magic Probe and more.
Got the Munching Squares demo by kbob working! I love simple eye candy like that. :) https://www.youtube.com/watch?v=1FN7HTlOfgg
Please enjoy this very high-res image of a minidisc https://cybre.space/media/wO9WCWZ8NZKRMUWOgbY
The 1Bitsy 1UP V0.1a is finally declared done. I have placed an order with OSHPark. Can't wait to see the boards when they are done! :) https://mastodon.social/media/ciTlmQ8IdyzN1Yx59sA
I have also exported the final schematic of the 1bitsy 1up v0.1 and uploaded it to hackaday.io, just in case someone feels like reviewing it. :) https://cdn.hackaday.io/files/256321096639488/1bitsy-1up.pdf
Finished routing the 1Bitsy 1UP V0.1 board! Generated gerbers but I need to sleep over it before I send them to OSHPark. :) https://mastodon.social/media/djVs_qPCpeiYhtBLs74 https://mastodon.social/media/Zc1DO4K1GKyBCaCzr3g
Some more progress on the 1UP. Only audio amp/volume control and battery circuits left to be routed. https://hackaday.io/project/25632-1bitsy-1up/log/62343-routing-in-progress https://mastodon.social/media/PQCZQa9d8oTmpeI883I
Samtec screw machine header/socket samples arrived! Will allow us to mount the 1Bitsy very close to the base board of the 1UP. The combined standoff distance is ~3.86mm. The part numbers are the BBL-115-T-E and SL-115-TT-19 I love the high quality Samtec connectors. :D https://mastodon.social/media/vYU5wGVL3KiZc8EIngU
right there at the bottom. someone was asking me what mastodon was and tumblr slapped a rating on it
https://mastodon.starrevolution.org/media/QopjPGH7C1eEM-42QvM
On @deshipu request I have created a hackaday.io page for the 1Bitsy 1UP project. I even wrote a short first project update describing what I did today. :) Lets see how that works out. If you are interested too you can find it here: https://hackaday.io/project/25632-1bitsy-1up
Good progress on the 1UP today. It took much longer than I expected to draw the TFT mechanical drawing. It turns out I could not find a single usable kicad drawing for TFT displays. Had to use quite spartan buydisplay.com datasheet, Adafruit Eagle footprint and calipers to put it together. But I think it will do the job and maybe it will save someone else a lot of work in the future. :) https://mastodon.social/media/d_tkTNTPvAn_cJCkGbc
Working on something new. Hopefully I will get it done before DefCon next month! I am very excited about this. I somehow have the feeling I am the only one. :( ... everyone seems to prefer RPi for this kind of stuff, but where is the spirit of limited resources and ability to understand the complete schematic? #mastodonexclusive #faithincommunity https://mastodon.social/media/N_vLpgiIDIuN2fDIXqc
Black Magic Probe V2.1 JTAG/SWD programmer/debugger with built in GDB server. Result of the first photo session using the new LED photo lights. https://mastodon.social/media/_3aM7bIgjRF1RuTtYwA https://mastodon.social/media/kMS5dsRbl2Dnvfla7Mw
I have set up new LED photo lights to make some updated BMP and 1Bitsy photos. Used CFL soft lights before, they had a nasty green tint to them and generated massive amounts of heat. I decided to get LED instead of buying a better set of CFL bulbs. https://mastodon.social/media/Mus-wTZxHfwMnqS-HdY
Black Magic Probe V2.1 production in full swing. Programmed, tested and serialized! BMP was designed in KiCad by yours truly, boards from OSHPark.
https://mastodon.social/media/K4iGo1DZ-Xb4PXQmbag
Black Magic 10pin ARM cortex JTAG/SWD to legacy JTAG 20pin connector adapters with a reset button.
https://mastodon.social/media/C-Gcgg7t5v1xG10UkUo
The only thing complicated about complex numbers is that they have two parts instead of one. They are a natural extension of numbers we use every day (specifically, an extension of real numbers that is closed under exponentiation).
We use complex numbers in DSP (and especially in SDR) because they make things simpler, not more complicated. A little time spent getting comfortable with complex numbers will go very far toward helping you take advantage of the extreme flexibility of SDR.
Every time you see a sinusoid, imagine that you are looking at a three-dimensional helix from the side. Those zero-crossings are illusory. The "amplitude envelope" is really just the distance to the time axis of the helix at any point.
A pure cosine becomes a perfect helix. If you change your view so that you are looking down the time axis, the helix looks like a circle. It is a point rotating about the origin over time. This is the fundamental figure of periodicity.
First small batch of packages of 1Bitsy Kickstarter rewards shipped.
@cyke hey~~ welcome :)
