Disclosed herein are photovoltaic building materials and related methods of manufacturing and installing such materials. An embedded security module can control the presentation of information on a display by controlling access to display memory. An amplifier has an inverting input terminal, a non-inverting input terminal and an output terminal. The control unit receives a power mode input representing a request to enter a new power mode, and issues the power mode signal in response. Some embodiments relate to systems for performing automated generation of aptamers.