I have a set of vintage door chimes that uses an electro-mechanical sequencer to activate a series of plungers to strike the chimes. The problem is the mechanism uses a low rpm motor to sweep a set of contacts over traces on a PC board to sequencially ring the chimes. It has worn to the point that it is no longer consistently rings the chimes. I've been testing the circuit with leds in place of optocouplers until I get the timing right (see attached). The problem I'm having to a shorten the activation of the led (about .2 second) while the time between each led in the sequence is about 1 second. Right now, each led stays on until the next one comes on. Is there some way to AND the output of the 555 with the outputs of the 4017 so the led is on only during the high pulse of the 555? I'd like to do i with discrete components that I have on hand rather that an IC if possible. Any ideas?
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