Electronics Online

The A / D converters are electronic devices that provide for a two-way relationship between the value of the signal at its input and the digital word obtained at its output. The relationship is established in most cases, with the aid of a reference voltage.

The analog to digital conversion is based on theoretical sampling theorem and the concepts of quantization and coding.

For all the circuits that are powered by DC voltage, should always be considered the correct polarity! Whether it is positive or negative pole, or the circuit will be damaged.

A diode for reverse polarity protection
Of course, there is a polarized connector system such as the hollow plug. For many small self-built circuits, voltage circuits for testing, often taken from the power supply. And because it can happen that you accidentally turn on the power supply with the wrong polarity on the circuit, which makes your project vain. Even when soldering hollow connectors can happen the same.

Fluorescent lamps are now widely used because they have a much lower power consumption than equally bright incandescent lamps. They are available in light colors sunlight, cool white and warm white.

Fluorescent lamps Design and function
Fluorescent lamps are one of the gas discharge lamp. It consists of a glass tube, which with mercury vapor and an inert gas such as argon or krypton filled. The inside of the glass tube coated with phosphor. This converts the light generated in the operation of the ultraviolet light in a longer wavelength, ie, into visible light.