Notifications
Clear all
Introduce Yourself
6
Posts
3
Users
1
Likes
481
Views
Topic starter
2022-10-12 6:05 pm
Since I haven't introduced myself to the community yet I thought I'd post this here
Hello fellow Canadian and Robot evil genius! 🙂 Dave from London Ontario here. Very sorry to hear about your health issues! I wish you well and hope the situation improves.
Check out my current project:
I">Wireless control of powered wheelchair
- Believe it or not I got the chair for $75 cdn - it had some severed cables and other light damage
- It folds up like a sandwich!!! (perfect for me being an apartment dweller)
- Yummy brushless 24v dc motors _with_ integrated electric brakes!, motor controller included
- I started looking at hacking the control protocol but decided to just go brute force and hack the joystick
- Joystick is 2 axis hall effect type
- Decided to just emulate the joystick with a digital potentiometer driven by an arduino and raspberry pi for comms
- So currently just open loop remote control but happy with the results thus far as it was quick, easy and cheap (had all stuff "in stock") hehe
During the Raspberry Pi dilemma my suggestion for no content would be try applying your skills to hacking /repurposing some stuff. People can always use inspiration and help saving money (and being environmentally friendly).
Cheers and be well,
Dave
2022-10-14 9:28 am
At $75 you are a lucky guy! 🤢 Perfect base for something with serious grunt. Any intention of going beyond simple human remote control to an autonomous robot base?
2022-10-14 1:18 pm
Welcome to the forum. What a bargain! $75, wow! As @robotbuilder says, some serious grunt.
Do keep us updated on progress.
Regards
Ron B
Ron Bentley
Creativity is an input to innovation and change is the output from innovation. Braden Kelley
A computer is a machine for constructing mappings from input to output. Michael Kirby
Through great input you get great output. RZA
Gauss is great but Euler rocks!!
Topic starter
2022-10-14 2:14 pm
Hey Ron, will do, thanks for the Welcome! If there's real interest I have my eye on the source of these salvage wheelchairs and would entertain connecting interested parties. Sadly, the bldc drive types are not as common as the older brushed systems (with their corresponding frames built literally like _tanks_). If i'm not mistaken: I've seen the manufacturer selling the motor, controller and joystick kits in the neighborhood of $300 which imho - complete value for the buck (before shipping handling and duty from Asia).
ron bentley reacted
Topic starter
2022-10-14 2:46 pm
Obviously, I'm a forum nOOb 🙂 I was sure I responded to @robotbuilder earlier! Not sure I've got the ideal/optimized setup for the forums here yet(ie. best browser/adblocker/virus configuration).
Intentions regarding current project are unclear the moment. We all maybe a little (or a lot perhaps) a like in this regard: it's taking no small amount of discipline to focus on a narrower range of ideas 🙂 the ideas, opportunities, and potential of this stuff we're playing with is mind blowing!
Cheers,
Dave
2022-10-14 7:15 pm
There is something wrong with this thread display. None of the buttons to Reply Quote Like or Report are active.
I saw no earlier reply so will wait to see if you repost in another section of the forum.
Some brushless motors use three internal hall effect sensors which can be used for accurate position sensing in a robotic base.
https://www.digikey.com.au/en/blog/using-bldc-hall-sensors-as-position-encoders-part-1