Air freshener project kit (Timed fan)

This kit uses a silent low current motor to spin a fan, making it perfect to circulate air through an air freshener containing potpourri or it can be used to move a light weight buggy. The electronics take no power in standby and when the switch is pressed the motor spins for up to 100 seconds. This time is adjustable via the on board variable resistor.

This kit contains:

• 1 x 2AA battery holder
• 1 x 1Kohm resistor
• 1 x 1Mohm resistor
• 1 x 1Mohm potentiometer
• 1 x 220uF capacitor, electrolytic
• 2 x BC547 NPN transistors
• 1 x push to make switch
• 1 x low inertia motor
• 1 x fan
• 0.5m connecting wire
• 1 x air freshener PCB

PCB dimensions: 46mm x 28mm.

Requires x2 AA batteries, available separately.

Click here to download build instructions 

Note: Schools will receive a more detailed set of teaching notes on a CDROM.