Hi, I'm trying to build a clock using 4 7 segment LEDs. The requirement is that the clock must display the time using signals from a computer. Currently I have a four 7 segment displays, a 555 timer, 74LS47 Binary to decimal decoder, RS Flip Flops, and a 74LS245 Buffer/Transceiver, a few resistors and capacitors. A description would be appreciated, but if possible could anyone post up a circuit diagram. Any help would be greatly appreciated. THX.