Difference between revisions of "RPI-MDI"

Revision as of 17:25, 5 January 2020

Raspberry Pi daughtercard
- Fits on "old" Model B or "new" Model B Plus board
Three axis Servo PWM outputs (Servos not included)
Two PWM Controlled LEDs
I2C controlled 16-channel PWM controller PCA9685
5 channels used as above (Three Servo outputs, 2 LED outputs)
PWM controller has internal built-in clock generator - no refresh required
Even though the Raspberry Pi has 3.3V I/O, the PWM outputs run at 5V - compatible with typical servos
Three switch inputs with on-board pull-ups which can be used as GPIO lines
3X of 10 uF SMT capacitors on rear of board for PWM/Servo noise reduction
Right angle connectors for Low Profile
Recessed connectors for side connectors for smallest form factor
Very small size 1.4" x 1"
Jumper to use 5V from Raspberry Pi (if your power supply has sufficient capacity) or pads for external power or additional capacitance if needed
Python PWM - Adafruit driver

@@ Line 10: / Line 10: @@
 * Raspberry Pi daughtercard
-* Fits on "old" Model B or "new" Model B Plus board
+** Fits on "old" Model B or "new" Model B Plus board
 * Three axis Servo PWM outputs (Servos not included)
 * Two PWM Controlled LEDs
-* I2C controlled 16-channel PWM controller PCA9685
+* I2C controlled 16-channel PWM controller [https://www.nxp.com/products/power-management/lighting-driver-and-controller-ics/ic-led-controllers/16-channel-12-bit-pwm-fm-plus-ic-bus-led-controller:PCA9685 PCA9685]
 * 5 channels used as above (Three Servo outputs, 2 LED outputs)
 * PWM controller has internal built-in clock generator - no refresh required