The mbed system is the ARM’s answer to Arduino. A web-based IDE lets you write C++ code ... encoder we had was on a little PCB that you get when you buy one of those Chinese Arduino 37 sensor ...

Here is a motor speed sensor module ... the module was connected to an Arduino board and measured the rotation per minute (rpm) rate of a geared robo motor (150rpm@5V) with the help of a home-made ...

[Florian] set out to solve this issue with an encoder that measures filament speed, which acts ... The encoder is hooked up to an Arduino which measures the Gray code pulses as the encoder rotates ...