Abstract: A dispenser to be fitted on the top of an aerosol can so as to atomize a very small quantity of the contents of the aerosol can at regular intervals automatically. An attachment having an electrically operated valve is secured to the aerosol can. Operation of the valve takes place via a controller which is supplied by power by a photovoltaic or solar panel. In this way, it is ensured that dispensing the desired material takes place only when there is sufficient light striking the solar panel.