EB-114 Optoelectronic Semicondutors

Innovative Technologies in Education (ITE)

EB-114 Opto electronic Semiconductors

The EB-114 is a single board comprehensive instructional module designed to teach basic concepts of Optoelectric Semiconductors to technology students. The module can be operated as a stand-alone unit or integrated to the newly developed EB-2000 Computer Managed Laboratory. The module contains experimental circuits with which the student performs a number of conceptual experiments at various levels of difficulty. Manual or computer driver fault-finding exercises and testing are available when the module is interconnected to the EB- 2000 system, providing valuable experience in the training and diagnosis of faults. Test equipment, when used, attaches to the board via 2mm jacks, placed at various points around the circuits. Students are required to do only a minimal amount of wiring so training time is maximised. A comprehensive student manual is provided with each training module. The manual correlates to the exercises to convey concepts relating to the technologies covered, allowing focus on specific performance objectives

Description

The EB-114 module is designed so students will spend the maximum time on the experiments and practice drills for testing comprehension and troubleshooting. The module also ensures that students use their time more efficiently. The printed circuit boards are pre-wired so that set-up time is minimal. For operation the module is connected to a PUZ-2000. To facilitate the exercises, all the major signals are brought out on-board with 2mm jacks for tests and interconnections. The ICs and the transistors are mounted on sockets, enabling easy replacement. The student has only to plug-in the appropriate patching cords and shorting plugs in order to perform the recommended experiments. The boards also come equipped with "black boxes" containing components used in the fault-finding and practice modes, components that should not be visually identified by the trainee.

OBJECTIVES
Understand the theoretical explanation of the LDR (Light Dependent Resister), its structure and characteristics.

Assemble the circuits for drawing the LDR characteristics as function of light intensity.

Use the oscilloscope to obtain the LDR characteristics

Be familiar with LDR applications.

Understand the theoretical explanation of the PHOTODIODE, its structure and characteristics.

Assemble the circuits for drawing the PHOTODIODE characteristics as function of light intensity.

Use the oscilloscope to obtain the PHOTODIODE characteristics.

Be familiar with the photovoltaic effect.

Be familiar with the PHOTODIODE’s main applications.

Understand the theoretical explanation of the PHOTOTRANSISTOR, the structure and its characteristics.

Assemble the circuits for drawing the PHOTOTRANSISTOR characteristics.

Understand the phototransistor circuits, operating as an amplifier and in switching mode.

Use the oscilloscope to obtain the PHOTOTRANSISTOR characteristics.

Be familiar with the PHOTOTRANSISTOR applications.

Understand the theoretical explanation, its structure and its characteristics.

Assemble the circuits for drawing the LED characteristics.

Use the oscilloscope to obtain the LED characteristics.

Be familiar with the LED’s applications.

Understand the theoretical description of the Incandescent Lamp.

Understand the description of the Incandescent Lamp according to:
Lamp construction
Bulb shape and diameter
Filament types

Assemble the circuit for drawing the curve of the lamp’s resistance as function of the voltage applied to the Incandescent Lamp.

Measure the relative light intensity.

Measure the effect of the preheating current.

Understand and be familiar with the alphanumeric display.

Understand the principles of operation and basic circuits of numeric displays on decimal and hexadecimal counters.

Assemble practical circuits using up/down counters and alphanumeric display.

Understand the theory, structure, and operating principle of the LCD component.

Understand and be familiar with LCD as:
Effect of voltage on display quality
Effect of backplane frequency on display quality

Test the various stages of a relatively complex circuit on the faults in Electro-optic circuits.

Locate the fault within the stage of a circuit

RECOMMENDED EXPERIMENTS
Light Dependant Resistor (LDR)

Photodiode

Phototransistor

Light Emitting Diode (LED)

Incandescent Lamp

Alphanumeric Display

Liquid Crystal Display (LCD)

Troubleshooting

REQUIRED ACCESSORIES
DL-20 Standard set of 2mm Patching Cords and Shorting Plugs

REQUIRED MEASURING EQUIPMENT
20MHZ Dual Trace Oscilloscope

Digital Multimeter 3-1/2 Digits

2.2MHZ AM/FM Function T Generator

MANUAL
Student and instructor manuals, written by pedagogues and electronics professionals, support every stage of the learning and teaching process.