At Threeways we made a vibrotactile loop that can be activated using an on-board switch or an external switch plugged in through a Jack port in the device. Pressing the button to activates the vibration which is provided by a motor housed in a synthetic rubber and PVC repurposed from a massage tube. We had this tube spare after using the caps from it to fix 2 other massage tubes and thought it would be a shame to waste it, so the vibrotactile loop was born. This packs quite a punch and is a great tactile sensory tool.
The last image in the grid above is the Fritzing plan for the simple electronic set-up inside the main box. The components we used were:
When using the 3v regulator be careful to check which pins are which before connecting. The motor requires 3v and the LED 12v so we used, as an in-between, a 9v battery with a regulator to allow 3v to go to the motor and the 9v to go straight to the LED.