Electronics System 2

An advanced electronics system for circuit projects, analysis and circuit testing

Electronics System 2 consists of a set of components mounted in handy to use plug-in “blocks” with two or four plugs sockets. Along with our Electronics System 1, you can perform many advanced experiments.

The system allows the student to quickly set up and assemble circuits by simply plugging each electrical circuit “blocks” into the lab circuit board.

In order to perform more advanced experiments some items included in Electronics System 1 could be needed.

Using our System 2 upgrade you take students from the basic properties of transistors right through to practical applications of electronic amplifiers.

Laws and principles investigated

List of the experiments detailed in the instructio

Bridge rectifier

Using a Diode as a full-wave rectifier

One of the most famous applications of the diode is rectification which is the conversion of an alternating current (AC) to a direct current (DC). The simplest rectifier is the half-wave rectifier: A single diode allows only one half of an AC waveform to be transferred to the load.

In some applications half-wave rectification has a high inefficiency, due to the large harmonic content and to the limitation of supplying power to the load once every half-cycle. If one needs to rectify AC power in order to obtain the full usage of both half-cycles of the sine wave, a more efficient circuit can be obtained by simply doubling the half-wave rectifier.

The resulting circuit is called full-wave rectifier: One diode works just during the first half-wave, the other in the next half-wave, and so on.

But this two-diode rectifier has a big disadvantage: the necessity to use a transformer with a centre-tapped secondary winding, which is generally cumbersome and expensive, especially in high-power applications.

Usually a four-diode bridge configuration is preferred. While one set of two parallel diodes is forward biased, the other set is reverse biased and can be considered as eliminated from the circuit.

By using a datalogger we can easily study rectification in a circuit. The datalogger is used for recording the signal traces of the input and the output.

Audio amplifier

How to design a basic amplifier

With Electronics Lab System 2 is possible to design a basic audio amplifier. That is a simple circuit that will boost the input audio signal and then generates an output signal by means of a speaker. The circuit is composed by two transistors, one being the driver, and
the other the power transistor.

The input audio signal, generated by a microphone, is boosted by the circuit and is picked up at the output by means of a speaker. The circuit provides the student with a good way to observe the practical behaviour of an amplifier.

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