tender for supply of kit , amplitude modulation and demodulation trainer kit 1 ) carrier generation -xr 2206 - 100 khz to 1 mhz 2 ) audio signal generation – wien bridge oscillator - 20 hz to 20 khz 3 ) xr 2206 based amplitude modulation at different modulation index 4 ) diode detector for demodulation 5 ) legend printed on the pcb and wooden cabinet , pulse position modulation generation and detection kit 1 ) pwm generation circuit 2 ) pulse position modulation generation 3 ) reconstruction of pwm signal 4 ) reconstruction of original signal using low pass filter and ac amplifier 5 ) legend printed on the pcb and wooden cabinet , single phase half controlled bridge converter with resistive load 1 ) phase angle control circuit using tca 785 2 ) control scheme to vary the phase angle of the half bridge 3 ) trigger circuit for scrs and with pulse transformers 4 ) half bridge power circuit to drive the pmdc 24v motor , series and shunt equalizer kit 1 ) audio oscillator 0-20khz, frequency and amplitude control 2 ) shunt equalizer for low pass 3 ) series equalizer for high pass 4 ) series and shunt equalizer for band pass 5 ) with amplifier and speaker => limited