If you don't want to wait that long, you can temporarily add a NPN switching transistor as a simple pulse inverter.
Input via 1k to the base, 10k between base and emitter, emitter to ground.
Pull up resistor of 1k from +5V to collector, collector as output to the 112's
This way you ignore the lower output level of the oscillator.
Quick and dirty, I agree...
Leo
satbeginner