novel flashing lights

55 novel flashing light As you may have already guessed, this circuit ess than a method of illumi- By altering the pin numbering a totally "random" display sequence can be obtained. Remember that if more outputs are to be used the reset connection must be moved to the next, unused ouput. sorts of The effects can also be comb ined : t all represents no more or l Ds . LE The diagram shows five of ter P1 is increased the nating a series LEDs, but this can be extended to a maxi resistance of potentiome charge and discharge time for this capacitor in- creases and therefore the frequency of the oscillator decreases — this results in the LEDs being lit for longer periods. The squarewave pulses are fed to a divide-by- en counter, IC2. The outputs of this counter each go high in turn after every clock pulse. The previous output, which was high, now goes low and the LED connected to it, via the resistor and transistor, will go out, while the next LED in the sequence will come on. Finally,...