DC Switch for Haptic feedback Gadgets

This is an extension to a VR Haptic Chair project I've created. By replacing the relays in the project with Infineon's CoolMOS™ C7 Gold superjunction MOSFET for switching.

In my custom build VR Haptic feedback seat, mechanical switches and relays are used to trigger motors, fans, and vibrating pad. High frequency of switching reduces life time of relay. It’s also Inefficient and generates annoying clicking noise.

I want to replace mechanical relays with efficient MOSFET. It will allow higher switching frequency greater than 40 hz to allow more reactive experience with shocks and vibrations.. Silent solid state switches is more durable than physical switch that’s prone to the wear and tear.

Microcontroller interface with CoolMOS to switch on arrays of DC powered haptic feedback devices for a VR bike game. Control variable speed fan motors to simulate wind. Drive PiezoElectric transducer to simulate vibration in the seats. It’ll also power the servo motor to simulate force feedback of resistance in the peddle.

Advantage Provide true PWM speed control for fans and vibration interval. Allowing feedback based on selection.

DC Switch These are connected to MOSFETS by Infineon.

Used 12V female DC socket for ease of detachment. Used power adaptor provide enough current to power all connected 12V DC devices.

Haptic Feedback components

• Piezoelectric Massage pad attached to the chair. Full vibration setting with analog power switch to on for all regions.
• 2 fans with different speed settings to simulate wind and direction.
• LED lights for visual feedback
• Tiny Solenoid 12V is used to simulate buzz to the head.

12V DC fan from computer case - mounted in front of VR head set to simulate wind. Speed controllable via PWM.

TIny 12V Solenoid- Simulate impact from games. Gave a good vibration shock to the head without the pain.