16-Channel 12-bit PWM/Servo Driver expander
If you want to make a robot which has lots of moving parts or if you want to control too many LEDs with PWM outputs, then the limited PWM outputs of your microcontroller would be a big problem.
To overcome this problem, the only thing you need is the above.
You can control 16 free-running PWM outputs with 16-Channel 12-Bit PWM/Servo Driver using only 2 pins. You can even chain up 62 breakouts to control up to 992 PWM outputs.
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 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
12-bit resolution for each output - for servos, that means about 4us resolution at a 60Hz update rate
Configurable push-pull or an open-drain output
The output enable pin to quickly disable all the outputs
Terminal block for power input
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
A spot to place a big capacitor on the V+ line
220Ω series resistors on all the output lines to protect them, and to make driving LEDs trivial.
This board/chip uses I2C 7-bit address between 0x60-0x80, selectable with jumpers.
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