27-Channel PWM Shield
Revision as of 09:05, 17 December 2014 by Qian.zhang (talk | contribs) (Created page with "== Introduction == This is a 27-channel PWM shield that adds 27 independent PWM channels to Arduino or pcDuino. File:pwm32_1.jpg == Caution == There is a jumper labele...")
Introduction
This is a 27-channel PWM shield that adds 27 independent PWM channels to Arduino or pcDuino.
Caution
There is a jumper labeled P1 on the shield. If the jumper P1 is installed, the Vin of Arduino/pcDuino will be connected to the external power supply Vin+ of the PWM shield. So please remove the jumper P1 when use it on pcDuino, as the Vin of pcDuino cannot exceed 5V.
Specification
- Number of Channels: 27
- Driving frequency: Adjustable, default 50Hz (a period of 20ms)
- Communication Interface: SPI
- Precision: 5us by default driving frequency 50Hz
- Optional External power supply: 6～24V
Schematics
Usage
The PWM channels are labeled on the shield as below:
