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Band Gap Energy Gap in GE Crystal 4 Probe Method

AE-1204-02

The Four Probe Method is one of the standard and most widely used methods for the measurement of resistively of semi-conductors.
The error due to contact resistance, which is specially serious in the electrical measurement on semi-conductors, is avoided by the use of two extra contacts (probes) between the current contacts.
As long as the resistance of the crystal and contact resistances are small compared with the effective resistance of the voltage measuring device (potentiometer, electrometer or electronic voltmeter), the measured value will remain unaffected. Because of pressure contacts, the arrangement is also specially useful for quick measurement on different crystals or sampling different parts of the crystal.

Probe Arrangement :

It has four individually spring loaded probes,

Sample :

Germanium crystal in the form of a chip.

Oven :

It is a small oven for the variation of temperature.

Four Probe Set-up :

Set-up consists of three units.

Mini Oven

With Heater ON/OFF Switch and Lid

Complete set with circuit engraved and in box with power supply wire and shoe Abron

Price : Rs 0 eachSend Enquiry
 
   
   
 

Band Gap in a Semi-Conductor Bsc Exp 190 Electronics To determine the band gap in a semi-conductor using a PN junction diode

AP-2340

To determine the band gap in a semi-conductor using a PN junction diode

Apparatus Required: Power supply, microammeter, electricaly heated oven,thermometer, semiconductor diode


Price : Rs 0 eachSend Enquiry
 
   
   
 

Band Gap of Semi-Conductor Diode

AE-1204-01

In the Semi-Conductor Diode with the increase in surrounding temperature,
the current suddenly starts flowing excessively to see this band,
the instrument is designed accordingly

Power Supply Ist

0 - 30 Volt at 15 mA

Power Supply IInd

0 - 1.5 Volt at 10 mA

Voltmeter Dual Range

0 - 30 V / 1 - 1.5 V DC 65 mm

round ma

uA : 15 mA / 100 uA

Mini Oven

With Heater ON/OFF Switch and Lid

Semi-Conductor Diode :Fitted in Lid
with Terminal Thermometer :110 x 1/2C
For Forward & Reverse characteristic patch cord connection can be changed.Complete with Manual and Connection Wire.

Price : Rs 0 eachSend Enquiry
 
   
   
 

Battery Charger Abron

AE-1206

Input 220V AC, Output 0-12v in steps with Ammeter
Usage :For charging battery from 230 V AC, 50 cycles line. This charger is
recommended for general use in laboratories especially where the drain on the battery is quite severe.The charger is equipped with heavy transformer, silicon diode bridge rectifier,ampere meter,current control switch and safety fuse.DC output 2 - 4 - 6 - 12 Volts selectable at

AE-1206A

Output 2A

AE-1206B

Output 3A

AE-1206C

Output 5A


Price : Rs 0 eachSend Enquiry
 
   
   
 

Battery Charger Automatic Abron

AE-1207

Output Current and voltage adjusts automatically as per battery being
charged with Ammeter The instrument is designed to give constant
output. It cuts off charging when the battery is charged to its capacity
and has solidstate circuit Reverse Polarity Protection.
Built-in a nicely polished box with indicator.
One meter 65 m round.
Input:230 Volts AC.

AE-1207-01

Output-12 Volts DC at 3 A.

AE-1207-02

Output-12 Volts DC at 4 A.

AE-1207-03

Output-12 Volts DC at 5 A.


Price : Rs 0 eachSend Enquiry
 
   
   
 

Battery Eliminator

AE-1205-01

Battery Eliminator with full wave silicon diode bridge rectifier. Safe and reliable source of low voltage DC for use in class rooms for various experiments while avoiding the decrease characteristics of partially exhausted dry cell. having full wave bridge and Double wound Transformers. Using copper wire and high grade lamination to avoid losses. Supplied in metal box powder coated having lock type terminals ON / OFF switch, jewel, light etc.
Input :230 Volts AC 50 c/s.

AE-1205-01

Ouput 2, 4, 6, 8, 10, 12 Volts at 500 milli amps.

AE-1205-02

Ouput for Calendar and Barns

AE-1205-03

Ouput 2, 4, 6, 8, 10, 12 Volts at 1 Amp.

AE-1205-04

Ouput 2, 4, 6, 8, 10, 12 Volts at 2 Amp.

AE-1205-05

Ouput 2, 4, 6, 8, 10, 12 Volts at 3 Amp.

AE-1205-06

Ouput 2, 4, 6, 8, 10, 12 Volts at 4 Amp.

AE-1205-07

Ouput 2, 4, 6, 8, 10, 12 Volts at 5 Amp.


Price : Rs 0 eachSend Enquiry
 
   
   
 

Battery Eliminator (Stabilized)

AE-1205-21

Safe and reliable source of low DC voltage. Solid state circuitry offers protection against
inadvertent short circuits common in learning situations.
Regulation better than 2 % on full
load. Supplied in metal box powder coated having lock type terminals ON / OFF switch, jewel, light etc.
Input 230 V AC Output either 1.5 to 12 Volts or 2 to 12 Volts.

AE-1205-21

Output 2.0 to 12 Volt DC at 1 Amp.

AE-1205-22

Output 2.0 to 12 Volt DC at 2 Amp.

AE-1205-23

Output 2.0 to 12 Volt DC at 3 Amp.


Price : Rs 0 eachSend Enquiry
 
   
   
 

Battery Eliminator AC / DC

AE-1205-31

The unit contains a transformer with a variable voltage and a silicon diode bridge rectifier.
Supplied in metal box powder coated having lock type terminals ON / OFF switch, jewel, light etc.
Two terminals for AC output, two terminals for DC output.
Thus battery eliminator can be used as a step down transformer also.

AE-1205-31

Ouput 2, 4, 6, 8, 10, 12 Volts at 500 milli amps.

AE-1205-33

AC/ DC Ouput 2, 4, 6, 8, 10, 12 Volts at 1 Amp.

AE-1205-34

Ouput 2, 4, 6, 8, 10, 12 Volts at 2 Amp.

AE-1205-35

Ouput 2, 4, 6, 8, 10, 12 Volts at 3 Amp.

AE-1205-36

Ouput 2, 4, 6, 8, 10, 12 Volts at 4 Amp.

AE-1205-37

Ouput 2, 4, 6, 8, 10, 12 Volts at 5 Amp.


Price : Rs 0 eachSend Enquiry
 
   
   
 

Battery Eliminator Metal Rectifier

AE-1205-11

supplied with SELENIUM METAL BRIDGE RECTIFIER instead of silicon diode rectifier.
different applications would require different voltage values, the equipment has provision to
select the required voltage from the range 0 V to 12 V.
A knob in the front panel facilitates selection of the required voltage. The output is made
available in the front panel through screw terminals for easy connection to the
experimental set up.
Fuse : To ensure the safety of personal handling the equipment
DC fuse is provided in series in the output circuit.
The protects the equipment against excessive loading of the output. Supplied in
metal box powder coated having lock type terminals ON / OFF
switch, jewel, light etc.
Output from 0-12 Volts DC.

AE-1205-11

Range 1 Amp

AE-1205-12

Range 2 Amp

AE-1205-13

Range 3 Amp

AE-1205-14

Range 5 Amp


Price : Rs 0 eachSend Enquiry
 
   
   
 

BH Curve Apparatus

AE-1208a

The instrument is designed to draw the characteristics BH Curve of a transformer.
The instrument has built-in power supply 0 - 10 - 20 - 30 V AC with transformer
output variable by a pot and load resistance. 2 terminals are provided for
connectins for X and Y and 3rd common for CRO.
* Complete with Manual and Connection Wire.

Price : Rs 0 eachSend Enquiry
 
   
   
 

BH Curve Apparatus complete set up with CRO 5MHz

AE-1208b

The instrument is designed to draw the characteristics BH Curve of a transformer.
The instrument has built-in power supply 0 - 10 - 20 - 30 V AC with transformer
output variable by a pot and load resistance. 2 terminals are provided for
connecting for X and Y and 3rd common for CRO.
Complete CRO 5 MHZ and Manual and Connection Wire.

Price : Rs 0 eachSend Enquiry
 
   
   
 

Binary Adder 4 Bit Abron

AE-1211

Complete set with circuit engraved and in box with power supply wire and shoe Abron
Price : Rs 0 eachSend Enquiry
 
   
   
 

Binary Counter Two

AE-1212

Complete set with circuit engraved and in box with power supply wire and shoe Abron
Price : Rs 0 eachSend Enquiry
 
   
   
 

Binary to Decimal Encoder

AE-1210

Complete set with circuit engraved and in box with power supply wire and shoe Abron
Price : Rs 0 eachSend Enquiry
 
   
   
 

Bistable Multivibrator

AE-1258-03

Circuit has two transistors, associated components with three diodes, monopulser, buffered LED and in-built power supply. Complete with Manual and Connection Wire.
Optional :Triggered CRO, Audio oscillator.


Price : Rs 0 eachSend Enquiry
 
   
   
 

Boolean Algebra Trainer

AE-120

Complete set with circuit engraved and in box with power supply wire and shoe Abron


Price : Rs 0 eachSend Enquiry
 
   
   
 

Bread Board Abron Solder less

AE-1213

For making and study circuit without solder
Price : Rs 0 eachSend Enquiry
 
   
   
 

Bread Board solder less on box With Power supply

AE-1214

Complete set in box with power supply wire and shoe Abron
Price : Rs 0 eachSend Enquiry
 
   
   
 

Brewster's Angle using Polaroid Abron

AE-1215

AE-1215A

Photo Cell + Power Supply

AE-1215B

Poloroid Set for above

AE-1215C

High Resolution Spectrometer + Prism

AE-1215D

Sodium Vapour Lamp with TXR + Box


Price : Rs 0 eachSend Enquiry
 
   
   
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