This is a simple slide switch for the LilyPad. Use it as a simple ON/OFF switch, or to control LEDs, buzzers, sensors, etc.
Four spindles on the trackball have a tiny circular magnet the end; each of these are paired with an SMD hall effect sensor, which are used to measure up, down, left and right movements of the trackball.
The Phidget Mini-Dual Axis Joystick is a dual axis mini joystick with momentary contact switch.
Need 2-axis of control and a button? Think back to the joystick on a PS2 controller! This is just like it!
This simple 4x4 pad is a cost effective membrane keypad.
PicoSwitch is a relay switch that you toggle via hobby radio control gear.