Hi I have only recently read about sync and sourcing. I have made a simple circuit which uses a NE555 timer and a 4017 Decade counter to simply, as each output comes on it turns on a LED then as it goes off the next starts etc. I was just wondering if i can use the outputs when they are low to switch on other LEDs by supplying VS to the LED (obviously in the opposite direction as the LED which comes on when the output is high) AM I BEING DUMB?