Magnetic particle brake¶
On the lever axis behind the gear. The board's current sink drives its coil from 0 to about 49 mA to set the resistance the mouse feels while the lever is released.
| Vendor | Placid Industries |
| Part number | B5Z-1R |
| Datasheet | mouse-joystick-pcb/docs/datasheets/brake.pdf |
| Where | one per station |
| Model nodes | PLACID INDUSTRIES B5Z-1R:* |
Connection¶
| Board | Connector | Cable |
|---|---|---|
| mouse-joystick-pcb | J1801 |
Brake coil lead |
Circuit¶
Schematic block brake_torque_sensor/brake_current_sink_0_49ma_dac80501 on the joystick board: its page on the board's site has the schematic, the parts with their sourcing, the ports and where the block sits on the board; the interface map and the schematic PDF at the tagged revision cover the rest.
Firmware¶
Files: mouse-joystick-firm/src/BrakeTorqueHw.hpp, mouse-joystick-firm/src/BrakeTorqueBackend.hpp, mouse-joystick-firm/src/DAC80501Device.hpp
Protocol: BRAKE, ev RELEASED, ~BRAKE_FAULT in the fault mask (protocol)
Proved by: mouse-joystick-firm/examples/BrakeAndTorque, mouse-joystick-firm/docs/brake-torque-bringup.md; measurements in the bring-up log by board serial.
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