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Photo Diode Characteristics Apparatus
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Photo Diode Characteristics Apparatus

(HL-8006)
To plot a current versus Intensityof light at different value of volatges. Instrument consist of DC regulated Power Supply, two round meters for Voltage & current measurement, Photo diode mounted separately on the panel, connections of supplies & photo diode brought out at terminals/sockets with Light Source.

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Photo Cell Charcteristic Apparatus
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Photo Cell Charcteristic Apparatus

(HL-8007)
Objective: To plot Forward & reverse Charcteristics of a Selenium Photo Cell verify Inverse Square Law of Light.

Features: selenium Photo Cell mounted in meal box having window for injecting light, light source with 60W lamp, Photocell kit with DC micro ammeter of 1000mA & DC Millivoltmeter of 500mV.

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Decade Resistence Box
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Decade Resistence Box

(HL-8009 )
Code
 No.
 

Sub Division

TOTAL

140
141
142
143
144
Single Dial
"
"
"
"
0.1
1
10
100
1000
1
10
100
1000
10000
145
146
147
148
Two Dials
"
"
"
0.1 &1
1 & 10
10 & 100
100 & 1000
11
110
1100
11 K
149
150
151
Three Dials
"
"
0.1, 1 & 10
1, 10 & 100
10, 100 & 1000
111
1110
11.1 K
152
153
Four Dials
"
0.1, 1, 10 & 100
1, 10, 100 & 1 K
1111
11.11 K
154 Five Dials 0.1, 1, 10, 100 & 1000 11.111 K
155 Six Dials 0.1, 1, 10, 100, 1 K & 10 K 111.111 K

Switches Used          : Brass with silver Plating
Resistance used       :  Wire wound, wound non-inductively on Bakelite
spools, heat treated & processed for ageing, varnish coated.
All resistances are of 1 watt.
Wire Used : Constantan Accuracy 0.1%, Manganin 0.05%.

 


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Two Stage RC coupled Transistor Amplifier
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Two Stage Rc Coupled Transistor Amplifier

(HL-8010)
Objective: Study Frequency Response of single stage & two stage RC Coupled Common Emitter Transistor Amplifier.

Features: Instrument comprises of DC Regulated Power Supply, Circuit diagram is printed, components mounted on the front panel.

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Hartley Oscillators
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Hartley Oscillators

(HL-8011)
Objective: To study the Frequency and Wave shape generated by a Hartley Oscillator. Features: Instrument comprises of 12V DC Regulated Power Supply, circuit diagram Prinetd & components mounted on front panel.

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Triode Valve Characteristics Apparatus
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Triode Valve Characteristics Apparatus

(HL-8012)
Objective: VI Characteristics of Triode Valve at various Grid voltages.

Features: Instrument comprises of DC Regulated Power Supply 0-300VDC/30mA & 0-25VDC/10mA, AC Power Supply 6.3 VAC/1Amp. there round meters for voltages & current measurement, valve diagram is printed on Front Panel, connections of supplies & Valve brought out at 4mm socket.

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Energy Band Gap for Semi Conductor Diode
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Energy Band Gap For Semi Conductor Diode

(HL-8014)

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Study of Adder And Subtractor
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Study Of Adder And Subtractor

(HL-8013)
Objective: To verify the Truth Table of Digital Half Adder, Half Subtractor, Full Adder & Full Subtractor.

Features: Instrument comprises of DC Regulated Power Supply 5VDC/150mA for logic inputs, 3 SPDT switches provided for selecting logic '1' & logic '0', 2 Red LED output indicator, circuit diagram printed their respective IC's placed inside the cabinet & connections brought out at sockets.

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Thermistor Characteristics Apparatus
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Thermistor Characteristics Apparatus

(HL-8015)

Objective: To plot negative Resistance co-efficient Characteristics of a Glass Thermistor.

Features: Instrument comprises of DC Regulated Power Supply 00-10VDC/150mA two round meters for voltage & current measurement, one Glass Thermistor is kept in Oven, connections of supplies, Meters & Thermistor brought out at 4mm sockets. Also provided with Oven with temperature control knob.


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BATTERY CHARGER
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Battery Charger

(HL-8016)
  • A    Battery Charger  2-12 VDC/1 Amp
  • B    Battery Charger  2-12VDC/2 Amp
  • C    Battery Charger  2-12VDC/3 Amp
  • D    Battery Charger 2-12VDC/5 Amp
  • E     Battery Charger
  •       6VDC/12VDC/ 3AMP  with fine current control.
  • F     Battery Chager  6VDC-12VDC/5 Amp  with fine current control. 

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STUDY OF INSTRUMENTS OPERATIONAL AMPLIFIER IC-741 WITH DIGITAL PANEL METERS
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Study Of Instruments Operational Amplifier Ic-741 With Digital Panel Meters

(HL-8017)

Objective:- Calculate the volatge Gain of instruments Amplifier and draw a curve between V & AR.

Features:-
Instruments comprises of one  ± 12 VDC regulated Power supply,2DC regulated short circuit and overload protected continuously variable power supplies,3 no- IC 741 placed inside & connections brought out at sockets. One potentiometer and combination of resistance placed on the front panel. 


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LDR CHARACTERISTIC APPARATUS
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Ldr Characteristic Apparatus

(HL-8018)

Objective:- To plot a graph,current Vs Intensity of Light at diffrent value of voltage.

Features:- Instrument comprises of DC regualted Power Supply 0-3 VDC/150ma,two round meters for volatge & current measurement.LDR mounted on the panel, connections of supplies & LDR brought out at 4mm sockets. Lamp holder with 60W bulb are given with this apparatus.


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OHM LAW APPARATUS
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Ohm Law Apparatus

(HL-8019)

Objective:- To verify Ohm's Law i.e V=1R


Features:-
  Instruments comprises of two moving coil meters to measure voltage & current, one wire wound Potentiometer. Circuit diagram printed & connections brought out at terminals for connection 6 volts battery & one wire wound Resistance.


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BH CURVE APPARATUS
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Bh Curve Apparatus

(HL-8020)

Objective:- To Trace Hystersis curves on CRO using Resistance,Capacitance & Inductance.


Features:-
Instruments comprises of AC Power Supply 3-15 VAC, Output selectable using band switch,circuit digram of BH Curve Printed, Components behind the front panel, provision for connecting external Inductance,Input & Output Connections brought out at sockets.


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HALL EFFECT EXPERIMENT
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Hall Effect Experiment

(HL-8021)

Introduction:

The resistivity measurements of semiconductors can not reveal whether one or two types of carriers
are present; nor distinguish between them. However, this information can be obtained from Hall
Coefficient measurements, which are also basic tools for the determination of carrier density and
mobilities in conjunctions with resistivity measurement.

Hall Effect experiment consists of the following:

1) . Hall Probe (Ge. Crystal Mounted on a PCB).

2) . Electromagnate 10,000 Gauss.

3) . Power Supply for Electromagnete.

4) . Constant Current Power supply with Two Digital Meters.

Digital Millivotmeter 0-200mV sensitivity ± O.lmV. Auto polarity.
Digital milli Ampere-meter 0-20mA , sensitivity ± 0.01mA.

5) . Digital Gauss meter with Hall Probe, 20KG .


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