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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You could also just flash the lights (or maybe one and then the other) to indicate a pending shutdown. I've seen several office lighting systems that do this and then wait 1 minute before shutting the lights off for the night. Anybody can then meander over and tap the light switch to cancel the shutoff.
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I'm not sure if this is the case, but it almost looks like there are a few isolated ground planes around the power supply region.
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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.
