tender for purchase of mechatronics lab equipments = limited; 1 mechatronics lab equipments 2 circuit with a thyristor (scr), a dc voltage source, and a load resistor and measure and observe the thyristor’s turn-on characteristics by varying the gate trigger 3 mosfet or igbt, a dc voltage source, and a resistive load and investigate the switching behavior of the mosfet or igbt by applying gate signals with different rise and fall times 4 single-phase or three-phase rectifier circuit using diodes and measure the output voltage and current waveforms for different load conditions and input voltages(inbuilt transformer voltmeter and ammeter and r load) 5 single-phase inverter circuit using igbts or mosfets and generate sinusoidal output voltages by modulating the switching of the power devices,24v dc input sinusoidal inverter) 6 chopper circuit using mosfets or igbts to control the speed of a dc motor and experiment with different pwm (pulse width modulation) techniques to vary the motor speed and direction 7 cyclo-converter circuit to convert ac power at one frequency to ac power at another frequency and measure the output waveform and frequency under various load conditions 8 speed control of a dc motor using pwm techniques 9 stepper motor control with various step modes and torques measurements 10 closed-loop position control of a stepper motor using an encoder