Objective of this experiment:
To demonstrate the operation of a typical uni-junction
transistor and show a practical application of the device.
You will determine the peak voltage (VP)
and valley voltage (VV) and construct relaxation
oscillator.
Built in regulated supply + 15V/300mA.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C8: SILICON
CONTROLLED RECTIFIER (SCR) CHARACTERISTICS & TESTING
METHODS
Objective of this experiment:
To verify that the SCR is basically a rectifier which
conducts current in only one direction. However, the
device can be made to conduct (turn "ON") or stop conducting
(turn "OFF") and therefore provide a switching action
that can be used to control electrical current. To draw
the V-1 characteristics by taking different readings
of anode voltage and anode current to get the forward
break over (VF) and holding current (IH).
Built in regulated supply + 15V/300mA.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C9: PHASE CONTROL
OF AN SCR
Objective of this experiment:
1. To study the firing angle of SCR during positive
& negative half cycle.
2. Two SCRs are connected in opposite directions & anti-parallel,
are used to control the phase.
Built in power supply: 30V AC
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C10: SPEED
CONTROL OF MOTOR USING SCR
Objective of this experiment:
1. To control the speed of the AC motor, hand driller,
etc, using SCR.
2. The gate is triggered by diac device to control the
speed of motor.
3. The SCR conducts in one direction when it is triggered
by a positive voltage applied between gate & cathode.
The trainer is operated with 230VAC/50 Hz mains.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C11: CONSTRUCTION
OF SCR TRIGGERING CIRCUIT USING LDR
Objective of this experiment:
In this experiment the photocell (LDR) is used in conjunction
with an SCR. The LDR triggers the SCR under proper conditions
of light. The SCR in turn acts as a switch to turn the
lamp that is Load either 'ON' or 'OFF'
Built in power supply: (0-18) VAC/50
Hz.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C12: CONSTRUCTION
OF UJT FIRING CIRCUIT FOR SCR
Objective of this experiment:
1. To construct a relaxation oscillator using UJT.
2. To fire the SCR gate using the relaxation oscillator.
3. To find the corresponding load operation of SCR.
Built in regulated power supply:
+15V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C13:
UJT CONTROLLED SCR TIME DELAY CIRCUIT
Objective of this experiment:
1. To construct time delay circuit using SCR triggered
by UJT. To build relaxation oscillator using UJT and
the timing can be varied by different capacitors and
potentiometer. The pulses generated by UJT should be
given to gate for triggering. The SCR can be turned
ON with reference to the input pulses.
Built in regulated, power supply:
+ 15V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C14: CONSTRUCTION
OF SINGLE PHASE HALF & FULLY C0NTROLLED BRIDGE RECTIFIER
USING SCR
Objective of this experiment:
To construct single-phase half & fully controlled bridge
rectifier. Two SCRs are used in two arms of the bridge.
During positive half cycle the firing angle of SCR1
can be controlled and observed. During negative half
cycle the firing angle of SCR2 can be controlled and
observed on CRO. Similarly both positive & negative
half cycles of applied AC signal can be rectified.
Built in power supply: 0-18V AC/50Hz
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C15: DIAC
& TRIAC CHARACTERISTICS
Objective of this experiment:
1. To observe the forward & reverse V-I characteristics
of Triac and plot the graph.
2. To observe the forward & reverse V-I characteristics
of Diac & plot the graph.
3. To observe the break over voltages of Diac & Triac.
Built in regulated power supply:
+15V/300mA, -15V/300mA, + (0- 35)V/300mA; -(0-35)V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C16: SPEED
CONTROL OF AC MOTOR USING TRIAC
Objective of this experiment:
1. The speed of the motor is controlled by Diac and
triac.
2. The triac is bi-directional device. The gate is controlled
by Diac.
Input Supply: 230 VAC/50Hz mains
operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C17: CONSTRUCTION
OF FAN REGULATOR USING DIAC & TRIAC
Objective of this experiment:
To construct fan regulator circuit. The firing angle
of triac can be varied and gate is triggered by the
break down voltage of Diac.
Input Supply: 230 VAC/50Hz mains
operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C18:
LAMP CONTROL USING DIAC & TRIAC
Objective of this experiment:
To construct Lamp dimmer using Diac & Triac. To build
Lamp control circuit using Triac. The gate of the triac
is triggered by diac (bi-directional device). The firing
angle can be varied by the gate control simultaneously
the brightness of the lamp can be varied.
Built in power supply: 130 VAC/50Hz
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
VACUUM TUBES: CHARACTERISTICS
AND TESTING METHODS
Model C19: VACUUM DIODE VALVE CHARACTERISTICS
& TESTING METHODS
Objective of this experiment:
This training board is a single PCB.
To demonstrate how much current flows for one arbitrary
value of applied voltage, to plot graph of voltage Ampere
characteristics. The starting point for this technique
is the static characteristics of the diode. (i.e.,) graph
of current versus voltage. This is combined with a graphical
construction called a load line, representing the applied
voltage and the resistance in series with the diode. The
combination provides information about the operation of
vacuum diode in the particular circuit represented by
the load line.
Built in regulated power supply: +(0-175)V/50mA;
AC voltage 6.3V/1 A.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL
C20: TRIODE VALVE CHARACTERISTICS
Objective of this experiment:
1. To study three electrical quantities.
- Plate Voltage VP
- Plate current lP
- Grid voltage Vg To demonstrate if one quantity
varies other will be affected.
2. To study three possible
characteristics showing this inter dependence,
- Between VP<& l<sub>P</sub> for constant value of Vg-static plate characteristics.
- To study the dynamic characteristics using various
load resistors.
Built in regulated power supply: -15V/300mA, +175 V DC/300mA,
AC voltage 6.3V AC
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C21: TETRODE
CHARACTERISTICS
Objective of this experiment:
To draw the characteristics
curve between plate voltage VP & plate current lP keeping
grid voltage constant.
Built in regulated power supply:
+ (0-175V)/300mA; 15V/300mA, AC voltage 6.3 V AC/1A.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL C22: PENTODE
CHARACTERISTICS
Objective of this experiment:
To draw the characteristics
curve of pentode. Adjust screen grid voltage to positive
potential & control grid is kept at Negative potential.
Vary the plate voltage & note the corresponding plate
current and screen grid current. Plot the plate current
against plate voltage.
Built in regulated power supply:
+ (0-175)V DC/300mA; 15V/300mA; AC voltage: 6.3 VAC/1A
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms
MODEL
C23: THYRATRON TUBE CHARACTERISTICS
Objective of this experiment:
To measure the grid control characteristic
of a thyratron. This experiment will provide an introduction
to the operation of this device and will serve to emphasize
the fundamental difference between the gas triodes and
the vacuum triode,
Built in regulated power supply:
+ (0-175)V/300mA, -15V/300mA, AC voltage: 6.3V AC/1A