vault backup: 2026-07-11 16:59:05

Notes/Electronics/PCA9685 16 x 12bit PWM.md

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+---
+tags:
+  - resource
+created: 2025-07-06 23:38
+---
+
+## Summary
+
+The PCA 9685 chip provides 16 channels of 12 bit PWM with a configurable PWM frequency for servo motor or LED control.
+## Notes
+
+Default I²C address for the PCA9685 board is 0x40.
+## References
+
+- https://crates.io/crates/pwm-pca9685 - supports setting address and 
+- [`pca9685_rppal`](https://crates.io/crates/pca9685-rppal) - only supports default address of 0x40 and hides the I2C interface!
+- https://docs.rs/pca9685-rppal/0.1.0/pca9685_rppal/index.html
+- https://github.com/jlyonsmith/pca9685-rppal
+- https://www.adafruit.com/product/815
+- https://cdn-shop.adafruit.com/datasheets/PCA9685.pdf
+- https://learn.adafruit.com/16-channel-pwm-servo-driver/hooking-it-up
+- https://blog.eldruin.com/pca9685-pwm-led-servo-controller-driver-in-rust