BASIC ELECTRONICS LAB

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CLIPPER & CLAMPPER Trainer kit; make : Hi-Q

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The 555 timer is used in number of applications. It can be used as Monostable, Astable multivibrator. Dc to Dc converters, Digital logic Probes, Analog frequency meters, Temperature measurement and control, Infrared transmitters, Burglar alarms, Voltage regulators and Time delay circuits.
a. To study the Astable Multivibrator circuit,
b. To obtain the different waveforms and,
c. To study the variation of frequency with R & C.

ACCESSORIES:

1) Hi-Q Electronics 555 Application Trainer.
2) C.R.O
3) 1 MHz Function Generator
4) Connecting Patch Cords.

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The Astable or free-running Multivibrator is a closed loop regenerative feedback circuit. Which has two states, both of which are quasi and stable. Without the aid of an external triggering signal, it switches back and forth from one stable state to the other, remaining in each for a time dependent upon the discharging of a capacitive circuit. Thus, the Astable circuit is an oscillator and is used as a generator of “square waves”.

a. To study the Astable Multivibrator circuit,

b. To obtain the different waveforms and,

c. To study the variation of frequency with R & C.

ACCESSORIES:

1. C.R.O. Dual beam 20MHZ
2. Connecting Patch Cords.---8 No’s

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a) To study the input , output and transfer characteristics of a NAND gate.b) To verify the truth tables of different logic gates using IC’s.c) To realize AND, OR, NOT and NOR functions using NOR gates.d) To realize AND, OR, NOT, and NAND functions using NOR gates.

Trainer Introduction: Basic Logic Gates Trainer is an extremely powerful lab teaching aid for studying the Basic Logic Gates such as OR, AND, NAND etc, to an extent of flip-flops. It allows the student to not only practically check the performance of the individual gates, but also helps in building different logic circuits and check their performance. Built-in fixed power Supply of +5V with overload and short circuit protection system is an added advantage of this trainer.
ACCESSORIES:
1.PATCH CORDS 

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To study Boot strap Generator.

the gating waveform at t = 0, transistor Q1 is in saturation. The voltage across the capacitor C and at the base of Q2 is V_ce (sat). The quiescent output voltage at the emitter of Q2 is lower than the base voltage by V_be2 and hence with respect to ground is at V_ce (sat) Vbe2, as indicated in fig. If we neglect this small voltage (a few tenths of a volt negative) as well as the small diode drop, then the voltage across C1 and also across R is V_cc. Hence the current iR is V_cc/R. Since the quiescent output voltage is close to zero, then the emitter current for Q2 for  t < 0 is V_ee/Re and the base current of Q2 is iB2 ~ V_ee/Re.hFE. Since iB2 is usually small in comparison with ic1.
Ic1~ iR = V_cc/R
ACCESSORIES:

1. Function Generator.

2. C.R.O.

3. Connecting Patch Chords.

 

 

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a) To calculate the voltage and current gains,
b) and to calculate the input and output resistance’s of Emitter Follower. 

ACCESSORIES:
1) Signal Generator
2) C.R.O
3)  Digital Multimeter
4) Connecting Patch Cords

a Common Collector Transistor Amplifier. Since the collector resistance is made to zero, the collector is at ac ground that is why the circuit is also called as a grounded collector amplifier or this configuration is having voltage gain close to unity and hence a change in base voltage appears  a an equal change across the load at the emitter hence the name Emitter Follower. In other words the emitter follows the input signal.

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1. To study the Monostable multivibrator circuit

2. To obtain the different waveforms and

3. To study the variation of pulse width with R & C.
ACCESSORIES

1. Function Generator

2. C.R.O

 

3. Connecting Patch Cords 
The Monostable Multivibrator which is also known as a univibrator or one shot multivibrator can be used to generate a gating pulse whose width can be controlled. In the monostable configuration, a trigger signal is required to induce a transition from the stable state to the quasi-stable state. The circuit may remain in its quasi-stable state for a time which is very long in comparison with the time of transition between states. After a certain interval of time, the circuit returns to the original stable state by itself.

 

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1) To Study of the realization of “AND,OR, NAND, AND, NOR” gates using diodes & Transistors.
2) To obtain the Truth tables of the above gates.

A Digital System functions in a binary manner. There are only two possible states or conditions. For example, a switch may be closed or open, a situation True or false, a voltage level high or low, etc., A node may be at a high voltage of say 4 +or -1V or at a low Voltage of say, o.7 +or -0.2V, but no other values are allowed.Various designations are used for these two quantized states, and the most common one is “one” and “Zero” respectively (positive logic system).

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