jma89
Member Since: November 26, 2010
Country: United States
Profile
Spoken Languages
English
Programming Languages
HTML/CSS, PHP, MySQL, BASIC (For what it’s worth)
Universities
Davenport University
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ElectroBOOM just did a video on Ohm’s law as well, and described the relationship between current, amps, coulombs, voltage, and resistance very well:
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The schematic is available on the GitHub page:
https://github.com/PiSupply/PiJuice/raw/master/Documentation/PiJuice_Schematic.PDF
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What technological improvement spurred on by AVC has impressed/inspired you the most? (Both in the maker community and commercially.)
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From what I’ve read it was actually due to a mistake/gerber file error in their first large batch of boards.
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Flexible filament also works well for printing designs on fabric that don’t necessarily require lots of height. Simon (from the RCLifeOn YouTube channel) did a few tests with 3D printing directly on t-shirts and had good success with flexible filaments.
Here’s one of the videos where he shows everything after going through a couple different approaches: https://www.youtube.com/watch?v=YUW8G4vXZfg
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There is an easy way to do programmatically simple “encryption” that’s uncrackable: A one-time pad, or OTP.
Basic gist: Have a single-use random string that’s the same length as (or longer than) the message you wish to send. Take your original message, add the OTP to it (per-character), and then MOD 26 the result (again, per-character. The Wiki page has a great example section for this.)
Only downside is that the security of a OTP comes from the secret never crossing an insecure channel. You could preload the entirety of spare flash with a massive (or several smaller) pads, then mark in EEPROM when they get used. (The base station would similarly keep track of this.)
Once all the pads are used up you’d have to re-compile (with new pads) and flash your transmitter again. Bonus points for just using a “small” (~8 GB) SD card instead and filling it with pads. Even if you did use them all it’s just a matter of swapping in a freshly filled card.
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They do support booting from the network without an SD card on some hardware: https://www.raspberrypi.org/blog/pi-3-booting-part-ii-ethernet-all-the-awesome/
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With Shawn’s work on the Laugh-inator complete, Nick has to work furiously to add a Self-Destruct button before he passes out.
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Ugh So much metric. I’ve converted units for those (like me) who can’t relate to metric measurements that easily:
Fully fueled, it weighs [almost] [3.1 million pounds]. It will be capable of putting [142,000 pounds] into Low-Earth Orbit (for reference, the entire ISS weighs [about] [882,000 pounds]), [59,500 pounds] into Geosynchronous-Transfer Orbit, [37,500 pounds] into Mars-Transfer Orbit — or sending [7700 pounds] to Pluto (seven times the mass of the New Horizons spacecraft). It has a total of 27 first-stage engines generating over 5 million pounds of thrust at liftoff.
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As cool as those outlets (and their supporting infrastructure) are, I do wonder what the ROI is on them, both from a monetary standpoint and an environmental standpoint. (All the extra support material has impact too.)
