In order to save money on mosquito repellent and reduce unnecessary exposure to the chemicals within, Instructables user "jack1986" describes his modification of a mosquito repellent vaporiser system by adding time and temperature control. In doing so he can sleep well with the mozzies being poisoned at night within the appropriate temperature range, and not waste the repellent while at work during the day. This is accomplished by using an Arduino with a real-time clock that can control relays which switch the power to the vaporiser.
As you can see from the project above, some external circuitry was required and this can be housed nicely on our Freetronics Terminal Shield for Arduino. The Terminal Shield breaks out all the Arduino headers to handy screw terminals, making it really easy to connect external wires to your motors without using a soldering iron. Ideal for quick experiments or for robust connections!