thank you for replying
I have the Emotiv Insight which includes a key mapper that can run on the window in focus… so my goal is to map keys(already done) to w,a,d,x and I have not been able to crack the digital signal mixing stuff yet and its WAY beyond my expertise so as a simple solution I’m going to mount 2 servos to my tx.
let me start fresh to explain the whole pic…
wheelchair with sabertooth dimensionengineering.com to receiver
Emotiv sdk has a training exercise for a block that moves which records your brain electrical patterns for things like “push”, “pull”, “lift”,“right”, “left”, “lower”, etc… which I want to use 4 of the samples for my application.
so laptop running with Arduino terminal up and listening for w,a,d,x with out a return button pressed to move the transmitter sticks.
its a rough and dirty way until I can afford an open source tx/rx
did that kind of make sense?
ive ben using my transmitter to drive my wheelchair for a year now, I’m just trying to incorporate my newest tech. the headgear.
Right, I’m beginning to get the picture now. So the servos are standard servos, operating the controls. I thought you might have been using large continuous-rotation servos to actually turn the wheels.
And rather than a custom TX/RX setup, you’re using a standard radio-control transmitter, much like those used for model planes, boats etc?
I’d personally use something like an APC220 433MHz transceiver module at each end, with the TX sending digital values to the chair’s RX module, which could be easily decoded to meaningful servo position signals.
I guess this is what you mean when you say “I have not been able to crack the digital signal mixing stuff yet and its WAY beyond my expertise so as a simple solution I’m going to mount 2 servos to my tx.”
This is a very interesting project to me. I’d never heard of the ‘Emotiv Insight’ headsets, but looking at the price, I couldn’t justify the cost for my hobby projects anyway. I’ve been playing around with the Mattel Mindflex headsets, but am not very satisfied with the results to date. Easy to hack and I have no problem getting the data from the headset, but the values aren’t consistent and the ‘Attention’ and ‘Meditation’ values don’t seem to correspond with my mental state.
I’ll be most interested to see how your project develops, and will help whenever I can.
I’m in the midst of a robot car project that uses a pair of continuous-rotation servos for wheel drive, and a standard servo for moving the ‘head’ back and forth, with an ultrasonic ‘ping’ sensor attached, to check for obstacles. As such, I’ve had a little experience with servo control and might be able to help a bit in this area.
A couple of questions:-
So, I assume you’ve had a go at servo control using the servo library?
Do you have much experience with Arduino yet?
Which Arduino model are you using?
The best approach is to make a start on the code for servo control, then post your code and ask for advice, and we’ll help along the way. When posting your code, be sure to place it between code tags, ( </> in the ‘Post’ window), add as many descriptive comments in the code as possible, and also include any other information that you feel is relevant.
As mentioned, I’m looking forward to seeing how this develops. Be sure to keep us updated as you progress.