The purpose of this experiment is to investigate the operation and characteristics of the astable multivibrator, the mono-stable multivibrator and bistable multivibrator, using transistors. Astable multivibrator is free running rectangular wave generator. It has two outputs, which are 180 degrees out of phase. Monostable is a one-shot multivibrator and R is triggered by sharp pulse, obtained by differentiating a square-wave. It produces one output pulse for each input pulse. A bistable is a flip-flop and it is stable either in '1' or '0' state, till it is triggered into their other state. Output changes for every two Input triggers. It can also be used as divide-by-two counter.

Built in regulated power supply:+5V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms

Objectives of this experiment:
The purpose of this experiment is to design and demonstrate the operation of stable (free running), monostable (one-shot) and bistable (two stages) multivibrators, using op-amp.

Built in regulated power supply: +15V/300mA; -15V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms

Objective of this experiment:
The purpose of this experiment is to design and demonstrate the operation of an astable, monostable and bistable multivibrator, using digital ICS.

Built in regulated power supply: + 5V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms

Objectives of this experiment: The purpose of this experiment is to demonstrate the operation of an astable, monostable and bistable multivibrator, using timer-IC-"555".

Built in regulated power supply: +5V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms

Objectives of this experiment:
1. To construct an emitter-coupled Schmitt trigger using transistors.
2. To observe that this produces a rectangular wave output from a sine wave input. To construct Schmitt trigger using op-amp.
3. To observe that any increase in amplitude of input sine wave has an effect on the width of the output waveform.
4. To verify these facts, using an IC-7413.

Built in regulated power supply + 15V/300mA, -15V/300mA.
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms

Objectives of this experiment:
1. To construct a timer circuit (IC-555) which can excite a time delay relay after a specific time interval after the application of power to the timer circuit.
2. To repeat the same experiment such that the relay contacts close during the time delay period.

Built in regulated power supply: + 5V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms

Objectives of this experiment:
1. To construct timer using transistor.
2. The frequency depends on capacitor or resistor.

Built in regulated power supply + 15V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms

Objectives of this experiment:
To construct light operated relay using 555. The ambient light around the cds cell decreases and timer 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

Objectives of this experiment:
To construct counter using 555 and LDR circuit. Depending upon the intensity of the resistance value of LDR varies & that will vary the frequency of 555 output.

Built in regulated power supply: + 5V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms

Objectives of this experiment:
To construct Burglar alarm using 555 & photocell.

Built in regulated power supply: +5V/300mA
Input Supply: 230 VAC/50Hz mains operated.
Dimension: 27cms x 17cms x 10cms.
Weight: 500gms