Help Servo Hat 16 Channel Raspberry Pi 3

[GioCa]

Hi Guys,
i need a little bit help with the Servo hat..
so what i've donse do far :
- I enabled the i2c : https://learn.adafruit.com/adafruits-ra ... guring-i2c
- then i tested the i2c with this : https://learn.adafruit.com/adafruit-16- ... st-the-hat
everything seems to work till here...
- then i attached a Servo (Micro Servo 9g SG 90 ) to the Servo hat
- i cloned the example code from git
- and ran the code with python : https://learn.adafruit.com/adafruit-16- ... on-library

The Problem ist nothing happen ...
in the example it seems that there appear thins like reseting or PWM frequency etc ... but when i run the ccode nthing happens ..
https://learn.adafruit.com/assets/22059

anyone any ideas ?

Thanks advance :)

[adafruit_support_mike]

Post a photo showing your hardware and connections and we'll take a look. 800x600 images usually work best.

[GioCa]

Sorry For the late answer .. Here are some Photos ..

[adafruit_support_mike]

The soldering on the stacking headers looks good..

What are you using as a power supply for the servo?

[GioCa]

AS Power SUpply i am using only the power supply for the raspberry 5.1 V 2.5 A ... i thought it is enough for one servo ... or do i have to connect also a power supply at the hat ?

[lbendlin]

Most likely, yes. Servo motors tend to pull the Pi Vcc down deep enough to cause it to reboot.

[adafruit_support_mike]

Yes, you need a second power supply.

The Servo Hat doesn't connect power from the RasPi to the servos. Even if the RasPi's power system could handle the load, servos (like all motors) generate a spikes and dips on the supply rails. Those would crash the RasPi on their own.