bids are invited for pn junction diode characteristics apparatus with aluminum panel and square meters , zener diode v i characteristics apparatus with aluminum panel and square meters forward and reverse , transistor amplifier circuits cb ce cc modes , fet common source amplifier , ujt characteristics apparatus and ujt as relaxation oscillator with aluminum panel and square meters , common emitter transistor amplifier , light intensity control using scr and triac , single phase scr bridge convertor universal ac dc motor controller , mosfet characteristics apparatus with aluminum panel square meters , igbt characteristics application , three phase fully controlled bridge converter with r load , scr commutation techniques , oscillators circuits hartley colpitt wein bridge phase shift oscillator , wein bridge oscillator using operational amplifier ic 741 , transistor push pull amplifier , fet characteristics apparatus with bakelite panel and round meters , lcr resonance apparatus with builtin sine wave oscillator , logic gates using six ttl ics 6 in 1 , digital logic trainer logic gates booleon identities and demorgans theorems , digital lab trainer with bread board , 4 bit adder and subtractor circuits using ic 7483 , 16 to 1 line multiplexer and 1 to 16 line demultiplexer , flip flops using nand gates and ttl ics , amplitude modulation and demodulation , frequency modulation and demodulation , wheatstone bridge portable with mfr resistance on board , kelvin bridge industrial with dc source and galvanometer , maxwell inductance bridge with inbuilt digital null detector sinewave oscillator etc , schering bridge with inbuilt with digital null detector sinewave oscillator etc , thermocouple trainer kit with digital meters as per iec 61010 , rtd trainer kit with digital meters as per iec 61010 , lvdt trainer kit with digital meters as per iec 61010 , strain gauge trainer kit with cantilever beam with digital meters as per iec 61010 , linear ic trainer , operational amplifier as inverting non inverting summing and difference amplifier with one digital voltmeter as per iec 61010 , active filters using operational amplifier , operational amplifier as schmitt trigger , 8085 microprocessor training kit with inbuilt power supply , 8031 microcontroller training kit with inbuilt power supply , transmission line trainer , dc regulated power supply dual output 0 30vdc 2 amps with fixed 5v 2v output with digital meters as per iec 61010