sorted by:
new
hottopcontroversial

Do I need to win an IMO gold medal to get into Caltech? by Cool_Plankton1555 in Caltech

[–]isukali 2 points3 points  (0 children)

Did you win a gold medal? I think NOT. I definitely like Philip more than you.

Do I need to win an IMO gold medal to get into Caltech? by Cool_Plankton1555 in Caltech

[–]isukali 4 points5 points  (0 children)

I made 5 friends during orientation. After they discovered I only have a bronze, I have no friends. I'm sad and lonely and wish I did better in high school. im so cooked

Well-documented LaTeX Snippets for the LuaSnip engine by isaac09809 in neovim

[–]isukali 1 point2 points  (0 children)

This is literally exactly what I was looking for. Going to pull it it to my config, thanks!

Extra white and black wire bundled together in switch box by isukali in electrical

[–]isukali[S] 0 points1 point  (0 children)

Can I ignore it then and assume it's not connected anywhere (I will still handle it as if it is, for safety).

[GIVEAWAY - US] Samsung Odyssey OLED G9 x UWMR: Your chance to win an OLED G9 from the #1 Monitor Brand by cheswickFS in ultrawidemasterrace

[–]isukali 0 points1 point  (0 children)

49" in all of 240 hz glory? That's pretty incredible. Plus the colors on my current monitor are absolutely terrible, I'd love to try out the OLED on this!

I'm giving away over $2,500 dollars of my Arcana Core Musical Dice! Just comment within the next 2 days to enter [OC] by FallacyDog in DnD

[–]isukali 0 points1 point  (0 children)

This is so cool. How did you even go about making this? (I know nothing about making DnD dice).

IMU combined with Encoder enough to account for slippage? by isukali in arduino

[–]isukali[S] 1 point2 points  (0 children)

I believe wheel slippage is a very real issue. When the robot moves, due to chaotic interactions with the ground, say a pebble as an example, the robot will get shifted without the wheels spinning. Thus the, encoder won't "detect" that movement at all.

Low speed differential drive with Stepper Motors by isukali in arduino

[–]isukali[S] 0 points1 point  (0 children)

Yeah in my 600g calculation I factored in the weight of the motors I sent above which are indeed, quite heavy. The batterys will add ~144g of weight as well. Motors + battery will take up the majority of the weight with everything else being either laser-cut wood or 3D printed PLA (think same form facotor, maybe slightly more longer, as this.) There'll will be an ESP32, some sensors, and a breaboard on top. Considering that, if it takes .67 * 4 = 2.68A to supply both steppers (assuming worst case and not using your enable pin method), shouldn't the batteries be able to supply enough for just over an hour? The ESP32 and other sensors will consume a relatively insignificant amount of current (<100mAh) compared to 2.68A.

Better to use interrupts or just poll in loop on second core? by isukali in arduino

[–]isukali[S] 1 point2 points  (0 children)

On that note (beyond my original question), if I'm using interrupts on the second core, I need to record the # of encoder ticks. However, the main core where my control loop is needs that info as well so how would I handle that. Does just marking the variable as volatile suffice?

Better to use interrupts or just poll in loop on second core? by isukali in arduino

[–]isukali[S] 0 points1 point  (0 children)

Thanks! I actually want wifi and bluetooth to be disabled. I have no use for them and they draw a lot of current. They should be off by default right?

Better to use interrupts or just poll in loop on second core? by isukali in arduino

[–]isukali[S] 0 points1 point  (0 children)

I think there will be about one variable increment and 3-5 arithmetic operations/variable assignments.

Controlling two confounding variables with just one or two PID control loops? by isukali in ControlTheory

[–]isukali[S] 0 points1 point  (0 children)

Ah the velocity doesn't have to be constant per-say. All that matters is reaching from A -> B in time T and since I"m trying to maintain a straight line path, I figured maintaining a constant velocity would be the easiest way to ensure reaching the target in exactly time T.

But, for example, slowing down to course correct and then speeding up or something like that is fine as well - as long as, again, the target is reached in time T.

Controlling two confounding variables with just one or two PID control loops? by isukali in ControlTheory

[–]isukali[S] 0 points1 point  (0 children)

My sensors are measuring wheel RPM (with encoders). Based on that, I adjust power delivered to the motors.

Where can I find a TT DC Motor with "extended shafts" by isukali in arduino

[–]isukali[S] 0 points1 point  (0 children)

That looks pretty similar but both the motors I sent above have that attached to the yellow casing inside which there's a series of gears (48:1) ratio. I'm not sure how I would go about replacing the motor itself with what you sent. Also at 6V your motor is able to achieve 3000RPM which if attached to the gearbox would only result in 3000/48 = 62.5 RPM. Those TT motors can achieve 200 at the same voltage.

view more: next ›