Direct current control - Githubissues

laurb9 / PanoController-Firmware

Platform for high-resolution panoramic photography, supporting 3D-printed PanoController board, Gigapan EPIC 100, Nodal Ninja Mecha E1 and other platforms.

MIT License

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Direct current control #19

Closed laurb9 closed 7 years ago

laurb9 commented 8 years ago

Investigate ways to control Aref (and motor current) dynamically. It is currently controlled via a pot on the DRV board. Possibilities include

break pot and use DAC + voltage divider
use 1-2 digital pins with resistors to drain from divider and create a couple preset intermediary steps by adding resistors in parallel to GND branch of the pot.
?

laurb9 commented 8 years ago

Made some measurements using gigapan board, which seems to confirm this idea might make sense. With motors on but not moving, the board draws 0.5A, but during movement this surges to 1.3A.

laurb9 commented 7 years ago

DRV8880 has current control (25, 50, 75 and 100%)

laurb9 commented 7 years ago

See #41