●● IRC: #techbytes @ Techrights IRC Network: Wednesday, May 18, 2022 ●● ● May 18 [02:05] *schestowitz_log has quit (Ping timeout: 120 seconds) [02:18] *schestowitz_log (~schestowi@freenode/user/schestowitz) has joined #techbytes ● May 18 [04:53] *u-amarsh04 has quit (Quit: Konversation terminated!) [04:54] *u-amarsh04 (~amarsh04@v6xmmrhxmbafc.irc) has joined #techbytes ● May 18 [06:47] *psydruid (~psydruid@jevhxkzmtrbww.irc) has left #techbytes [06:48] *psydruid (~psydruid@jevhxkzmtrbww.irc) has joined #techbytes ● May 18 [07:16] *psydroid2 (~psydroid@memzbmehf99re.irc) has joined #techbytes [07:20] schestowitz
[07:20] schestowitz[07:20] schestowitziCalendar feeds provide a simple solution to all these problems. We've tried to use this solution in a few groups with mixed reults.
[07:20] schestowitz
[08:51] schestowitz[08:51] schestowitzLate last year, this interesting article Flatpak Is Not the Future was published to the public, and very quickly grabbed the Linux communitys attention. I want to go over some of the author's arguments and explain some of the misunderstanding and claims.
[08:51] schestowitzDo keep in mind that I have nothing against the authors opinion. The point of this response is to reduce the amount of misinformation and misunderstanding that the article might have caused, as I have seen (and still see) many users post this article very frequently, without having a proper understanding of the subject.
[08:51] schestowitzAlright, lets get started.
[08:51] schestowitz
[08:51] schestowitz[08:52] schestowitzControlling the stepper motors was done with the aid of two L298N full H-bridge motor drivers, and in turn, they were each connected to a separate Arduino Uno that generates the correct sequence of steps. A single joystick mounted on the wheelchairs armrest sends signals to both microcontrollers that dictate which direction the wheels should turn. And finally, a basic 12V float charger can be attached [08:52] schestowitz using a three-pin XLR connector for easily charging the battery.
[08:52] schestowitz
[08:52] schestowitz[08:52] schestowitzThe device is essentially a drum plotter, which rotates a cylinder around an axis while moving the writing head back and forth to draw. For the X axis, michi used a basic NEMA17 stepper motor in conjunction with a CNC shield connected to an Arduino Nano. And rather than creating a custom horizontal Y axis from scratch, the machine instead utilizes a repurposed linear assembly extracted from an old DVD drive [08:52] schestowitz carriage, while a limit switch assists in homing the toolhead. Finally, a small servo motor holds the writing utensil so that it adequately contacts the masking tape.
[08:52] schestowitz
[09:05] schestowitz[09:05] -TechBytesBot/#techbytes-drewdevault.com | A Hare code generator for finding ioctl numbers [09:05] schestowitzModern Unix derivatives have this really bad idea called ioctl. Its a function which performs arbitrary operations on a file descriptor. It is essentially the kitchen sink of modern Unix derivatives, particularly Linux, in which they act almost like a second set of extra syscalls. For example, to get the size of the terminal window, you use an ioctl specific to TTY file descriptors: [...]
[09:05] schestowitz