Neck test 3

2x 16 channel PCA9685 servo driver
PCA9685 #1: JX PDI-6221MG servo (centre neck piston) @ 330Hz
PCA9685 #2: MG 996 R servos (left and right neck pistons) @ 60Hz
Raspberry Pi 3
MyRobotLab (myrobotlab.org)

https://www.thingiverse.com/thing:845793
https://www.thingiverse.com/thing:1243403
https://www.thingiverse.com/thing:1581955
https://www.thingiverse.com/thing:992918