Muscle electrical stimulator for force feedback in Virtual Reality
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This project on proof of concept stage now. I can grab virtual boxes with LeapMotion and make LED on the board glow with certain color.
I make streams on sundays with process of developing, but they are not too exiting :)))
You can see how it works now. Interesting part starts from 18:30
It's in development stage now. https://oshwlab.com/deluxe87d/neurodrive
Finally I made a first power up and actual muscle check. And surprisingly it was successful. It's only 24 volts mode but still you can feel a little stimulation on your hand
I started to draw schematic and pcb in easyEDA. Now it's almost empty, but i hove it will be completely full of data in a few weeks. So here is the link to the project https://oshwlab.com/deluxe87d/neurodrive
I almost finished second PCB with H bridge, and high voltage converter, you can see it on the photo. I use chinese accumulator board in my design. I hope I will finish it in couple of weeks. See ya!
UPD: summer 2021.
So now it works more or less. I figured it out how to get a proper PWM signal out of ESP32. There was a mistake on last post where I wanted to use a complement PWM. The algorytm is mush simpler, I just need one PWM channel and second simple polarity switch channel.
The high voltage and power pcb will be ready in couple of days, and after that I'll be ready to work on software part
Now I stuck with PWM generation on ESP32. I need to generete a complementary or inverted PWM in order to drive H-bridge. I've already got that i need to use mcpwm module inside esp32, but i can't figure out what settings i should use.
As fa as i get it I should use 2 operators, for example operator - 0 and operator 1, and take one signal from PWM0A and another signal from PWM1A. Or maybe I'm wrong. Hope I will find it on this weekend.
deluxe87
caBattista
Pratik Makwana
WJCarpenter
ElectronicABC