Introduction
When we are doing robot experiments, it needs to use multiple PWM ports to drive the servo motor, however, the commonly used Arduino R3 board only has 6 PWM ports, so it is not enough.
This allows you to use this expansion board, which is directly stacked on the R3 board and can drive up to 16 servos.
It uses I2C input, just occupies A4 and A5 interfaces.
The expansion board contains PCB double sided holes, which can direct to solder with components to build up prototyping circuits.

Specification
1. I2C input, to control 16-channel PWM output
2. Servo power supply independent V + input up to 6V
3. Logic signal and logic power independent output 3-5v
4. Frequency of 40-1000Hz
5. Number of channels: 16-channel
6. Resolution: 12-bit