I am trying to control a DC motor with encoder, using your HighSpeedEncder.
I started with the next statement.
wget -qO- http://www.phidgets.com/gpgkey/pubring.gpg
| apt-key add -
This gave me error messages citing that I am not root user.
(probably due to Oh or zero -mistake in my typing/reading the command)
Therefore, I changed to the root by issuing
The command brings me to the root user.
However, after several tries, I could not perform
sudo apt-get update
Since there were another error messages.
I'll appreciate it if you could guide me to some appropriate manual section.