ماژول کنترل سروو موتور با آی سی PCA9685

ماژول کنترل سروو موتور با آی سی PCA9685

بهره مندی از تکنولوژی push-pull، استفاده از پروتکل استاندارد، راه اندازی ساده و بدون نیاز به مدار واسطه برخی از ویژگی های این ماژول می باشند.

این ماژول علاوه بر کنترل سروو موتور در درایو کردن LED و روشنایی نیز استفاده می شود.

نمونه ای از کتابخانه و برنامه بوردهای آردیونو آن را می تونید در لینک زیر ببینید:

https://github.com/adafruit/Adafruit-PWM-Servo-Driver-Library

نمونه ای از برنامه بورد های رسپبری پای:

https://learn.adafruit.com/downloads/pdf/adafruit-16-channel-servo-driver-with-raspberry-pi.pdf

• It’s an i2c-controlled PWM driver with a built in clock. That means that, unlike the TLC5940 family, you do not need to continuously send it signal tying up your microcontroller, its completely free running!
• It is 5V compliant, which means you can control it from a 3.3V microcontroller and still safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4+ forward voltages)
• 6 address select pins so you can wire up to 62 of these on a single i2c bus, a total of 992 outputs – that’s a lot of servos or LEDs
• Adjustable frequency PWM up to about 1.6 KHz
• 12-bit resolution for each output – for servos, that means about 4us resolution at 60Hz update rate
• Configurable push-pull or open-drain output
• Output enable pin to quickly disable all the outputs

We wrapped up this lovely chip into a breakout board with a couple nice extras

• Terminal block for power input (or you can use the 0.1″ breakouts on the side)
• Reverse polarity protection on the terminal block input
• Green power-good LED
• 3 pin connectors in groups of 4 so you can plug in 16 servos at once (Servo plugs are slightly wider than 0.1″ so you can only stack 4 next to each other on 0.1″ header
• “Chain-able” design
• A spot to place a big capacitor on the V+ line (in case you need it)
• 220 ohm series resistors on all the output lines to protect them, and to make driving LEDs trivial
• Solder jumpers for the 6 address select pins