Experimental Training Equipments-> Opto-Electronic Devices

[1]   Click to Enlarge PHOTOCELLS - CHARACTERISTICS & TESTING METHODS Objectives of this experiment: 1. To demonstrate the effects of radiant energy on photocells (A photocell undergoes a large resistance change when exposure is changed from complete darkness to intense light, from several megaohms to tens of ohms). 2. To show how radiant energy can be used to control electronic circuits. 3. To use photocell as "a simple light intensity-to-frequency counter", in conjunction with a 555 timer. Built in regulated power supply: + 15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge PHOTODIODES: CHARACTERISTICS & TESTING METHODS Objectives of this experiment:- 1. To demonstrate the light sensitivity of a conventional photo diode, as an optical detector. 2. To demonstrate the relative effects of light Intensity and reverse voltage on the output of a photo diode Built in regulated power supply: +15V/150mA; -15V/150mA; +5V/300mA. Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge PHOTOTRANSISTORS CHARACTERISTICS & TESTING METHODS Objectives of this experiment: 1. To determine how the input resistance of an amplifier is affected by the Beta of the transistor and the value of the emitter resistor. 2. To demonstrate how Beta can be increased with the Darlington circuit. Built in regulated power supply: +15V/300mA. Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge LIGHT EMITTING DIODES Objectives of this experiment: 1. To demonstrate the operation of a typical visible light-emitting diode (red, green & purple coloured), after drawing a "forward current-versus-forward voltage" characteristics curve of an LED. 2. To select the current limiting resistance of an LED, and to verify that the LED has higher reverse resistance, just like NPN junction diode when LED is reverse-biased. 3. To demonstrate the difference in LED radiation patterns of red LED. Built in regulated power supply: +15V/150mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge RELAY CIRCUITS, USING PHOTO-DEVICES Objectives of this experiment: 1. To construct relay circuits using given three photo devices (light dependent resistor (LDR), photodiodes, photo transistor). 2. To observe the operating voltage of any relay. 3. To observe the relation among light sensitive components. 4. Relays are widely used in industrial applications. Built in regulated power supply: +15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge CONSTRUCTION OF TWILIGHT CONTROL CIRCUIT USING LDR, TIMER & RELAY Objectives of this experiment: 1. To construct twilight control using timer, LDR and to verify that when the ambient light around the LDR cell decreases the resistance of the LDR increases and the voltage at trigger input to the 555 decreases and causes the output to go high and it activates the relay. Built in regulated power supply: +12V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge SOLAR CELL CHARACTERISTICS Objectives of this experiment: You will focus bright sunlight on the solar cell and measure the voltage and also the current through the resistance. To plot a graph between voltage(V0)versus current (IL). Power supply is not required. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge DOT BAR GENERATOR CIRCUIT Objectives of this experiment: To study that single IC senses analog voltage levels and drives 10 LEDs, providing a linear analog display. Dot or Bar display can be selected using this trainer. Built in regulated power supply: +15V/300mA Input Supply: 230 VAC/50Hz mains operated. Dimension: 27cms x 17cms x 10cms. Weight: 500gms See Enlarge Click to Enlarge LIE DETECTOR SENSOR TRAINER Objectives of this experiment: In this trainer you will observe how to study the human being skin resistance affects during stress. Here, when a person is under stress (May be lying). Their GSR (Galvanic Skin Resistance) will decrease. This will cause the tone generated by your detector to increase. This trainer precisely demonstrates this principle and operates on 9V DC See Enlarge Click to Enlarge FANTASTIC SIMULATED LASER KIT Objectives of this experiment: This trainer uses a 555 timer to power an ultra bright LED. The output is a pulsating red light that can be projected using lenses. An ultra bright LED capable of 300 mA output is tied to pin 3 of the 555 timer. This IC is configured as an Astable multivibrator mode. This frequency is controlled by RC values. By adjusting P1 the frequency varies. The control changes the output from a slow blinking to fast pulsating light. This operates on 9V dc. This trainer precisely demonstrates this principle and operates on 9V DC See Enlarge Click to Enlarge selenium photocell See Enlarge [1] Go to Top