In the past decade, communications technology has seen some of its most impressive advances ever. From smartphones to video messaging, the communications field is dependent on advances in technology. Because communications technology is heavy on micro-level components (processors, circuits and storage hardware), technical engineering comes into play prominently in its production. A seminar on wireless or wired communications could focus on any aspect of technical engineering in the subject. For example, you could talk about how to set up broadband access over various types of fiber systems. This seminar would go into different types of systems and how broadband access works on each.
Circuit engineering is the practice of routing electrical energy in a useful system. Circuits are used in virtually all electronic applications. Technical engineers work out the technical details in circuit manufacturing, such as wiring and mass production. Seminar topics on circuit manufacturing would deal with the front-end production of circuits. One topic is the role of semiconductors in microchip manufacturing. In this seminar, you could explain that semiconductors are used to facilitate electron flow in microchips.
Audio and video functionality is included in many products on the electronics market, from smartphones to laptops. Audio and video are not stored as regular data like text or numbers. Instead, they must be processed on a computer's audio and graphics card, respectively. Seminar topics in audio/video include audio cards, graphics cards, and handheld audio/video functionality. A seminar on graphics cards, for example, can go into detail about how the graphics card converts system information into a physical image on the screen, and how technical engineers wire the computer tower to make this possible.
There are many different types of devices that can store energy. These include batteries, transistors, amplifiers and thyristors. Technical engineers design and build the platforms, storage space and circuitry for these devices. Topics on energy storage include storage materials, electrical conductivity and electrical amplification. A seminar on conductivity, for example, can talk about how much electrical conductivity and storage capacity various metals possess, and how easy or difficult it is to condense these metals into a small space where electrical energy can be conveniently stored.