supply of lab equipments , purchase of lab equipments , ldr charactertics trainer kit • to carryout ldr characteristics experiment by varying the intensity of the light • provision to vary the light intensity and measuring with lux meter • provision to connect voltmeter and ammeter in the ldr circuit • built in power supply and wooden closed cabinet , speed control of dc motor using optical sensor • 24v dc motor • variable speed circuit • slotted plate fitted in the shaft of the motor • opto interrupter to sense the slot to use the speed of dc motor measured the pulse • frequency to voltage converter circuit • digital display to display the speed • built in power supply • wooden closed cabinet , servo motor with potentiometer , test of dc motor using transistor and relay • to test of 5v dc motor using push button, limit switch, transistor and relay. • built in power supply and wooden closed cabinet => limited