Adding haptic feedback to a barcode scanner

We use a barcode scanner to validate tickets at our events. It's usually very noisy at the entrance so I decided to add haptic feedback.

Quantity		Component name
1	×	LM555 Clock and Timer ICs / Timer ICs
1	×	Resistor 10 M Ω
1	×	Resistor 10 Ω
1	×	Capacitor 22nF
1	×	ERM vibration motor
1	×	Diode