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Chris Parrott
Roboticist (Dr.) with a passion for making. Do 3D printing, programming, and electronics projects and sometimes YouTube videos:
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Chris Parrott 19h
Replying to @anverxt
Very nice! What belts are you looking to use for it?
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Chris Parrott 19h
Replying to @drfootleg
Ah, you've discovered that part of twitter too
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Chris Parrott Sep 27
Replying to @anverxt
It's completely happy with 4k. But, if it is a processor or bandwidth limit, dividing that across 12 or more motors may lead to poor performance. For reference, the ODrive runs its loop at 8kHz.
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Chris Parrott Sep 27
Replying to @anverxt
That's something I'm investigating too. With the simple FOC running on a Teensy 4, I was only able to get a 4kHz update rate. Not sure if the limiting factor is the algorithm, or the i2c bandwidth. Need to hook my scope up and check.
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Chris Parrott Sep 27
Replying to @anverxt
Yep, and that's the exact reason I'm exploring these other options 🙂
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Chris Parrott Sep 27
Replying to @anverxt
Other than that, the AS5600 itself works fine and would make for a great potentiometer / rotary encoder replacement
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Chris Parrott Sep 27
Replying to @anverxt
It only have a single I2C address that cannot be reprogrammed, so you'd need a multiplexer to use more than one. Also for BLDC control, I2C bandwidth can be a concern when shared across many encoders, hence me getting the SPI chips in to try
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Chris Parrott Sep 26
So many magnetic encoder breakouts! Soldered up AS5047D/48A/48B ICs on my boards, and swapped out the AS5600 on the Grove for the AS5600L variant
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Chris Parrott Sep 25
Be sure to check what department runs the course too, as that'll be an indication of what the bulk of the studies will be. At Sheffield Uni for example, mechatronics is run by the control systems department, so very maths heavy
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Chris Parrott Sep 24
Replying to @CannonFodder
This does remind me though, I need to decide what I'm doing with . Didn't think there'd be that much of a market for it, but as others are coming out with similar such boards perhaps there actually is?
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Chris Parrott Sep 24
Replying to @CannonFodder
And you've conveniently already got Pi HAT code ported to Arduino 😉
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Chris Parrott Sep 24
Replying to @orionrobots
Yep! Well, not at this exact moment, but they will be once I wire them up
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Chris Parrott retweeted
Dr Footleg - Roboteer Sep 23
After all my learning with C++ in and programming my and boards, I wrote up a guide on my blog.
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Chris Parrott Sep 23
Replying to @drfootleg
Awesome writeup!! That'll save me a bunch of time when I get around to trying VSCode proper
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Chris Parrott Sep 23
Replying to @Gadgetoid
Are you trying to recreate the lyrics for NOMA - Brain Power?
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Chris Parrott Sep 23
Replying to @ZodiusInfuser
Just noticed, the bottom side is meant to have a circle around the IC like the Grove one. Checking my design files, I did draw one, but drew it on a layer that didn't get exported 😂
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Chris Parrott Sep 23
Replying to @ZodiusInfuser
Shape matches the Grove board's they'll be replacing pretty well!
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Chris Parrott Sep 23
Encoder PCB's arrived from and were accompanied by a friend
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Chris Parrott Sep 22
You can tell students have returned to Sheffield. Apparently midnight is the perfect time to throw a party with loud music😠
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Chris Parrott Sep 22
Replying to @ZodiusInfuser
And now for retract
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