HNC

HNC Report As part of my HNC I was asked to Design, Manufacture and Test a circuit that would control both traffic lights and motor situated on a model of the Kincardine Bridge. The specification I was given was that the circuit board could be no bigger than 100 x 160mm and could cost no more than £50. Taking the specification into account I searched for components I would use to construct the circuit making sure the price was under the £50 limit (the total cost was £42.99). The second task I undertook was to design a board within the required size (the final size was 89 x 74mm) but I ran into problems with the design because of this there was a total of 20 designs before the board was ready to be manufactured, some of the problems are listed below. SIL Reed relay pins were the wrong size Earth connections were missing LED’s were over-lapping The pins on the 7406 were connected the wrong way round Once the PCB was designed, the board was then manufactured. The manufacturing process can be found in Appendix page 2`. The next stage was to test board, process, circuit, time, project, design, test, size, £50, wrong, worked, total, testing, spent, specification, reason, problems, pins, pcb, manufactured, main, hours, first, final, done, cost, components, amount, £4299, working, within, wire, way, waste, using, undertook