Norodix

@Norodix@lemmy.world

• ⁨Comment⁩ on ⁨Schematic review⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  No problem :) Let me know if you need any help!

• ⁨Comment⁩ on ⁨Schematic review⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  I don’t think the PWM on the arduino is slow for your application. Motors are actually great for filtering. Even if the current is not filtered, mechanically it is so slow that you can go as low as 100Hz and still drive the motor acceptably well.

• ⁨Comment⁩ on ⁨Schematic review⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  I also worry about the LM7818. It drops about 6V, so at 330mA it burns 2W, which seems like the maximum for the package that I quickly pulled up. If you have a very efficient buck converter that gives you at most about 1A to drive the motor. Not a lot of overhead.

  Also as I said already, you could just skip the whole thing and make everything work from the 24V using PWM. Since you want to drive it with an arduino that is not a difficult thing.

• ⁨Comment⁩ on ⁨Schematic review⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  If I were you, I would not step down the 24V, but use that to drive the motor with pwm. It requires a bit different H bridge but overall it would be simpler. But if you already have a converter module that is good enough this works too.

• ⁨Comment⁩ on ⁨Schematic review⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  I would omit the extra transistors and use only the optocouplers.

  What sort of application is this? Having 18V somewhere and a 5V supply too that can output several amps is quite unusual.

• ⁨Comment⁩ on ⁨Schematic review⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  Obviously. No idea what I was thinking.

• ⁨Comment⁩ on ⁨Schematic review⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  Is it okay that there is no stop state? It can only drive the motor in either direction, bit there is no OFF state with your inputs.

• ⁨Comment⁩ on ⁨Schematic review⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  Please don’t use non perpendicular lines and draw in a clearer software if possible. Its quite hard to read.

  What is the point of the push-pull BJTs? With the optocoupler you could drive the nmos gates directly. If you need more current to drive the gates (unlikely for a small motor), I suggest you buy dedicated gate drivers. They are tested and not expensive. If you have the 18V available already, using the optocouplers directly would be a lot simpler.

• ⁨Comment⁩ on ⁨Nike’s self-lacing Adapt BB sneakers are losing their remote control mobile app⁩ ⁨⁨4⁩ ⁨months⁩ ago⁩:

  Then it still doesn’t take away anything from you. How would an additional embedded web based control panel impact you negatively? If you don’t use it just don’t use it. But it ensures longevity and makes the device entirely self-contained.

• ⁨Comment⁩ on ⁨Nike’s self-lacing Adapt BB sneakers are losing their remote control mobile app⁩ ⁨⁨4⁩ ⁨months⁩ ago⁩:

  Its still stupid. No reason there is no embedded web interface. That is such an easy thing to do. Like routers have been doing for ages.

• ⁨Comment⁩ on ⁨Tea Time⁩ ⁨⁨5⁩ ⁨months⁩ ago⁩:

  I would try some saturn

• ⁨Comment⁩ on ⁨Physics⁩ ⁨⁨6⁩ ⁨months⁩ ago⁩:

  That is a pretty close approximation.

• ⁨Comment⁩ on ⁨The foot gonna rob a bank⁩ ⁨⁨11⁩ ⁨months⁩ ago⁩:

  Its frozone

• ⁨Comment⁩ on ⁨Do other people ever have the experience of simulating yourself doing something in your head, and then doing it in real life exactly how you imagined it?⁩ ⁨⁨1⁩ ⁨year⁩ ago⁩:

  I do that a lot. I can even correct mistakes before makong them. I imagine doing the motion and realize the angle that I am aiming is not good lr something.

  One time I was able to practice serving volleyball without a ball between two sessions and next week I drastically improved.