supply of eee lab items , supply of eee laboratory equipments , line synchronized ujt trigger circuit ? line synchronization dc power supply circuit ? ujt relaxation oscillator circuit ? provision to add dc pedestal voltage to the capacitor in the circuit ? triggering circuit for 2 scrs using pulse transformer ? 24 v lamp ac load using 2 scrs , diac – triac lamp control circuit ? variable ac power circuit using triac ? diac circuit to trigger the triac in both half cycles ? provision to vary the charging time of capacitor ( changing the phase angle also ) for the diac ? isolation transformer for 110 v ac, lamp load , scr commutation circuits ( class b & d ) ? natural commutation – 24 v ac power supply, dc triggering ? current commutation – 24 v dc power supply, pulse triggering, rlc components ? complementary commutation – main scr and auxiliary scr, 2 nos. of dc triggering ? resonant commutation – 24 v dc power supply, pulse triggering, discharge circuit to facilitate to trigger again voltage commutation – 2 nos. of scrs as on and off switches, provision to charge the capacitance which will be used for voltage commutation , single phase half wave controlled rectifier ? half wave controlled rectifier circuit ? phase angle control potentiometer ? provision to connect r load & rl load , single phase fully controlled bridge with r & rl load ? single phase full bridge power circuit ? firing circuit consists of phase angle control circuit using tca 785 ? triggering circuit from the output of tca 785 using pulse transformers ? vary the conduction angle and plot the output voltage ? r, rl load with freewheeling diode ? 24v, 2 a power supply for the power circuit ? necessary dc power supplies for the control circuits , single phase semi controlled bridge with r load trainer kit ? single phase halfbridge power circuit ? phase angle control circuit using tca 785 ? triggering circuit from the output of tca 785 using pulse transformers ? vary the conduction angle and plot the output voltage ? r & rl load ? 24v, 2 a power supply for the power circuit ? necessary dc power supplies for the control circuits , dc chopper trainer kit ? ramp generation circuit ? level translation circuit ? comparator circuit to produce pwm signal ? monostable circuit for triggering aux. scr ? chopper power circuit using main scr and aux. scr with inductance ? triggering circuit for 2 scrs with pulse transformer, necessary dc power supplies , pwm based step up chopper using mosfet ? pwm based control circuit ? power circuit to get variable dc , pwm based step down chopper using mosfet ? square wave generator ? integrator to generate the ramp ? comparator with dc voltage as one input ? mosfet switch to switch on the load, small dc motor as load , single phase single pulse inverter using mosfet / igbt ? 50 cycles generation ? variable duty cycle generation ? driver circuit ? h bridge power circuit using mosfet , trainer kit for smps using mosfet ? isolation transformer ? inverter circuit ? output circuit ? feedback circuit , dcshunt motor open loop & closed speed control circuit with 24 v pmdc motor kit ? phase angle control using tca 785 ? control scheme to vary the phase angle of the half bridge ? trigger circuit for scrs and with pulse transformers ? half bridge power circuit to drive the pmdc 24 v motor ? small 24 v pmdc motor ? necessary dc power supplies , open loop & closed speed control of ac motor ? carrier wave generation ? pwm generation according to the sine wave ? driver circuit ? h bridge power circuit using mosfet , universalmotor control circuit with fractional hp universal motor kit ? control scheme for phase angle control using tca 785 ? triggering circuit for scrs / triac ? scr / triac ac power circuit with switch and power socket ? fhp universal motor with plug built in power supplies , single phase parallel inverter using mosfet ? triggering circuit ? power circuit using mosfet ? lamp load ? chopper power circuit , single phase to single phase cyclo converter ? cyclo converter with divide by 2 supply frequency and divide by 3 frequency ? power circuit using center tapped 24 v transformer and 4 nos. of scrs and resistive load ? +ve and –ve polarity zero crossing detectors using opto couplers ? decade counters to generate required control signals ? separate 4 nos. of dc power supplies to trigger the scrs ? triggering circuits to trigger the ate circuits of power scrs , cro with power probe , multimeter => limited