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πŸ”Œ enhance your arduino and raspberry projects with the onyehn channel pca9685 logo

πŸ”Œ Enhance Your Arduino and Raspberry Projects with the Onyehn Channel PCA9685 Review

3

Β·

Very good

Revainrating 4.5 out of 5Β Β 
RatingΒ 
4.3
πŸ”Œ Electrical Controls & Indicators, πŸ’‘ Industrial Electrical

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Description of πŸ”Œ Enhance Your Arduino and Raspberry Projects with the Onyehn Channel PCA9685

Communication Interface: IIC. 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. Adjustable frequency PWM up to about 1.6 KHz;Configurable push-pull or open-drain outputManufacturer. 12-bit resolution for each output - for servos, that means about 4us resolution at 60Hz update rate.

Reviews

Global ratings 3
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  • 4
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Type of review

Revainrating 4 out of 5

Ideal for lighting models.

Ideal for model lighting! I use them and an Arduino Nano to drive the micro LEDs in my Lego models. These boards have resistors already built in to protect the LEDs and allow you to address multiple lights (from 16 to 8 per board) with a single nano and five-wire bus. The main thing is that they are just doing their job. /L library. Add the .h file to the script and start connecting the lights. And, oh yes, they will control the servos too.

Pros
  • Communication interface: IIC.
Cons
  • Crumpled

Revainrating 5 out of 5

Some versions have reverse polarity protection, others don't

I bought a couple of these last year and found that older versions didn't have reverse polarity protection. The latest version appears to be protected. However, the safety MOSFET is tiny, and if you daisy chain multiple boards or run many servos at higher current, a lot of current can flow through it and burn it out. Despite these limitations, these boards work as advertised. I've powered them with both 5V and 3.3V logic from Arduinos and ESP8266.

Pros
  • 6 address select pins, so you can connect up to 62 of these on an i2c bus for a total of 992 outputs.
Cons
  • Out of fashion

Revainrating 4 out of 5

But works great. Best in Controls and Indicators

Works great. I'm using it as a 16 channel DAC with a resistor/capacitor on the output. The circuit I show is a bit slow to respond (cannot be used for audio applications) but works great for general purpose control applications with very low ripple. However, be careful with the OE (Output Enable) line of this module. This is the active low input, not labeled on the board. I had to fiddle around a bit before finally looking at the PCA9685 datasheet. This module is a great alternative to using a…

Pros
  • 12-bit resolution per output - for servos this means about 4 Β΅s resolution at 60 Hz refresh rate.
Cons
  • Not bad, but...