How Touch screen Technology Really Works


Touch screen, since its innovation has sparked consumer frenzy in the global market, and is about to soar higher. Total Touch-Screen intentional revenue is expected to make $30 billion dollars by 2018. But the funny thing is, we use it every day, without most people knowing the electronics miracle working behind this apparatus.

Just 30 years ago, touch screen was introduced as a research enterprise, in 2007 January, Apple iPhone was handed to the common mass and it radically changed our access to touch screen. Nowadays it has swarmed into all smart electronics devices —GPS, cell phone, PC screens etc. Electronics video tutorial can rightly mark the phases of wonder how from PalmPilot petite stylus, came a transformed smart phones swipe-and-pinch interface that has changed the way how we communicate.

  • Different Methods of Touch Screen Technology


In the old days, I’m talking about pre-iPhone phase here; they used “resistive method” to devise a touch screen. “Resistive” method had a simple layout—two wafer-thin tough plastic layers, just a tiny distance apart from each other with current flowing in between. The screen rests above the layer on the upper side, and LCD display lies under the layer downward, What happens here is when you press the screen, It prompts a sensor to detect the point where these layers meet, and the digital signal pops up in harmony. This technology may lack the smoothness of today’s smart screens, but still used in ATM and other machines.

On the contrary, iPads, iPhones and latest smart phones can sense the electrical charge emanating from your skin when you lay a finger on the screen’s electrical field. How it works is quite simple. By use of “capacitive” method, the electronics device has changes in currents through the monitor screen. Electronics video projects demonstrate how the modern touch screen works with a layer of capacitive, a material capable of storing electricity.

One major difference here than the earlier version, that it’s sensitive to “multiple touch”. In a synchronized system, the capacitors are placed side by side. And this grid inside the iPad screen detects if there is any electrical changes at each point. For this reason, each point of the circuitry creates a signal when you touch the screen and the grid shoves it across to the processor. Tutorial on electronics video thus traces the variant factors influencing the touch screen technology to expand further.


Making your own circuit board


An electric circuit board is a key concept in the basics of electronics that is often assigned to the students. The following is an easy step wise electronic tutorial that aims to provide the fundamentals on building a circuit board.

PCB or Printed wiring board is the most common term used. The initial days of making circuit boards consisted of too many tiring procedures that included step by step wiring process. Creating circuits like this often resulted in faulty wire junctions or short circuits when the wires developed cracks. The lines and pads in a PCB connect all the components to each other electrically and the signals and power is routed between the physical devices. Solder, a fusible metal alloy is used as a joining component for the electrical components and the surface of the PCB.

A circuit board is an alternative layer which is joined together. The base substance or substrate used is fibre glass which provides proper structure and toughness to the board. The boards are usually of 1.6mm thickness although there are some others which are also of.8mm thickness. The layer above is a copper foil and its thickness can vary accordingly. And on top of it are the solder mask and the silkscreen layer.

Now that we have an idea of the components in a circuit board, let us take a look at the following electronic circuit tutorial, which talks components required to make a circuit board-

  • Eye protection and a mask to protect against dust.
  • Proper ventilation
  • Nitrile gloves
  • Transparent stock
  • A cheap photo frame
  • Transparent stock for laser printer
  • Drill press
  • Xacto knife, ruler, ruler, permanent marker
  • Chemicals such as ferric chloride, positive type developer and acetone.

To make a circuit board, there are also some other additional tips which will come in handy. Some of them are listed below.

  • Warm developer and etchant which will help speed up the procedure. But do ensure that you keep a track on your board’s progress.
  • Before you print, make sure to orient your design.
  • Keep the etchant away from the metals you will use.
  • Prepare your materials way ahead of time and get a separate place for your conducting of experiment.
  • Also, keep the board clear when you are drilling.

Although designing a very advanced circuit board is quite a long task, these tips and a few basic electronic circuit tutorials and points can help one through the initial stages when they are in the process of learning the basics of electronics.