6 x 8 cm Universal PCB Prototype Board Double-Side X 1 - Rs. 49 ( pcb fabrication) assembly Rs 0.8 per board 100nF capacitor - Rs. 3 NE555DR - Rs. 10 (approx.) Resistor - approx Rs 2 , each . total: Rs. 14 12v relay (EC-6576) - Rs. 67 BC547: Rs. 3.72, 1N4007 - Rs 1.13 PCB Box Plastic Enclosure: 100 per prototype Led 3mm X 5mm Rs. 17.88 Board Size (mm): 106 X 42 PCB Fabrication : Rs 894 PCB Assembly: Rs 1918 Board Thickness (mm): 1.6mm 2 layers Surface finish: HAL lead-free Total cost of two prototypes: Rs 5907 /- (approx.)